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Anodizing Companies

Last updated: January 2026

This directory lists 88 anodizing companies across the United States, from those specializing in small-batch, high-precision aerospace components to large-volume industrial finishing services.

Buyers typically seek anodizing companies to solve problems related to corrosion resistance, surface hardness, electrical insulation, and aesthetic finishing for aluminum parts. Key challenges include achieving consistent dye penetration across varied geometries, managing inevitable dimensional growth within tight tolerances, and ensuring reliable sealing to prevent 'bleeding' or premature coating degradation.

Anodizing suppliers vary significantly in their capabilities, ranging from job shops focused on standard Type II anodizing for consumer goods, to highly specialized facilities equipped for Type III hardcoat and specialized architectural finishes. Some excel in precision aerospace components requiring Nadcap and AS9100 certifications, while others cater to high-volume industrial parts with automated lines and robust quality systems like ISO 9001.

To facilitate an effective sourcing process, buyers should arrive with detailed engineering drawings, clearly defined alloy specifications, desired anodize type (e.g., Type II Class 1, Type III Class 2), crucial dimensional tolerances, and any specific color or finish requirements. Suppliers, in turn, expect clarity on racking point locations and critical surfaces, allowing them to optimize their process for quality and cost.

A notable trend in the anodizing industry is the increasing demand for environmentally compliant processes, particularly regarding hexavalent chromium alternatives for sealing and stricter wastewater treatment protocols. Furthermore, advancements in real-time process monitoring and automation are improving batch consistency and reducing lead times, particularly for high-volume orders.

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Company Directory

88 companies nationwide

Hillside, IL

Based in Hillside, IL, Ace Anodizing & Impregnating Inc. specializes in aluminum anodizing, offering Type II, hard coat, bright dip, and architectural finishes. Their facility handles large parts up to 24 feet long. The company also provides powder coating and chromate conversion, meeting ISO 9001-2015 standards.

Paterson, NJ

Based in Paterson, NJ, Aerotech Processing Solutions specializes in NADCAP certified anodizing and metal finishing services. They offer various anodizing processes and seal choices, alongside chem film and masking. Serving aerospace and high-tech industries, the company holds approvals for Mil-A-8625 and Boeing specifications.

Lorton, VA

Based in Lorton, VA, Alexandria Metal Finishers provides high-capacity anodizing and electroplating services since 1962. They specialize in demanding applications for aerospace, defense, telecommunications, electronics, and medical industries. The company also offers precious metals, exotic substrate plating, chemical films, electropolishing, and passivation.

Oxnard, CA

Based in Oxnard, CA, Alliance Finishing & Manufacturing is a plating and finishing company with over 25 years of experience. They provide premium plating, polishing, and secondary services for various metal substrates, including aluminum, stainless steel, and copper alloys. Serving equipment manufacturers globally, Alliance optimizes processes to meet or exceed Nadcap standards.

Stanton, CA

Based in Stanton, CA, All Metals Processing has provided quality metal finishing services since 1961. The company specializes in processing components for demanding aerospace, military, and defense industries, upholding stringent quality control. They professionally handle diverse projects, from small fasteners to large landing gear components.

South El Monte, CA

Alum-A-Coat, based in South El Monte, CA, specializes in aluminum anodizing and metal finishing. They offer Type II and Type III Hardcoat anodizing, chromate conversion, and passivation services. With NADCAP and ISO 9001:2015 certifications, the company provides high-quality finishing solutions for aerospace, medical, automotive, and commercial industries.

Fort Wayne, IN

Based in Fort Wayne, IN, American Anodizing Co. specializes in aluminum anodizing and hardcoat services. They provide Type II Gold, Black Hardcoat, and Fast Clear anodizing for military, automotive, and various industries. Handling volumes from prototypes to large-scale production, they offer comprehensive metal finishing for enhanced corrosion and wear resistance.

Fort Worth, TX

Based in Fort Worth, TX, Anodics, Inc. specializes in metal plating and finishing for aerospace and industrial markets. They offer anodizing, chromate conversion coating, and a comprehensive suite of solutions. Services include non-destructive testing, passivation, paint, prime, and powdercoating, providing a complete metal finishing experience.

Tualatin, OR

Based in Tualatin, OR, Anodize Solutions specializes in anodizing services for manufacturers, handling orders from single parts to thousands. Capabilities include Soft Anodize Type II, Hard Anodize Type III, Bright Dip, media blasting, and masking/plugging to meet diverse specifications.

Los Angeles, CA

Based in Los Angeles, CA, Anodizing Industries provides high-volume anodizing services since 1978. Specializing in Type II & III, architectural, die cast, brite dip, and color dye anodizing, they also offer chem film and wet paint. The company serves aerospace, automotive, architectural, and military industries nationwide.

Escondido, CA

Based in Escondido, CA, AnoPass Enterprises, Inc. specializes in metal finishing services, including Anodizing Type II, Chemical Film, and Passivation. Established in 1995, this family-owned business operates a 5300 sq ft facility with RoHS-compliant sulfuric acid anodizing lines, serving customers across San Diego County.

Portland, OR

Based in Portland, OR, Apex Anodizing is a full-service metal finishing shop. It offers anodize, powder coat, and chemical conversion services. The Nadcap-accredited company supports the aerospace, defense, healthcare, firearms, and hi-tech industries, providing high-quality finishing solutions from prototype to final product.

Chatsworth, CA

Based in Chatsworth, CA, A&S Finishing provides comprehensive metal finishing services. The company specializes in anodizing, chemical film application, passivation, and zinc plating. They offer solutions for industrial and commercial customers seeking quality surface treatments for their components.

Missouri City, TX

Based in Missouri City, TX, Ballard Aluminum Specialty Services, LLC specializes in aluminum finishing and anodizing. They offer strip and re-anodizing, grain finishing, and silk screen printing for sheet metal and machined parts. With over 60 years of combined experience, they also provide expert consulting, testing, and certifications.

Chicago, IL

Based in Chicago, IL, Chicago Anodizing Company provides comprehensive metal finishing services, specializing in anodized finishes for aluminum products. Their offerings include Type II (sulfuric) and Type III (hardcoat) anodizing, chemical conversion coatings, bulk processing, and bright dip, alongside color matching, polishing, and blasting.

Oroville, CA

Based in Oroville, CA, Chico Metal Finishing, Inc. specializes in decorative sulfuric anodize (Mil-A-8625 Type II) and hard anodize (Mil-A-8625 Type III) with various colors. They also provide ROHS compliant clear chromate conversion coatings, glass bead blasting, and precision masking. The company offers pickup and delivery in Northern California.

San Antonio, TX

Based in San Antonio, Texas, City Plating & Metal Finishing offers comprehensive metal finishing services. They specialize in Type II and Type III Hardcoat anodizing, meeting MIL-A-8625 standards, along with zinc plating, electroless nickel, and passivation. The company serves various industrial and commercial sectors.

Wolcott, CT

Based in Wolcott, CT, Clear & Colored Coatings LLC specializes in aluminum anodizing and metal finishing services. They provide Type III hard coat, Type II sulfuric (color) anodizing, and masking. With over 40 years of expertise, the company offers a large variety of anodizing colors, ensuring superior quality and compliance with RoHS/REACH standards.

Round Rock, TX

Based in Round Rock, TX, Consolidated Metal Technologies, Inc. (CMT) provides comprehensive metal finishing services. Specializing in aerospace, automotive, and hardcoat anodizing, the company also offers various plating, coating, and painting solutions. CMT serves OEM customers, including the semiconductor industry.

Garden Grove, CA

Based in Garden Grove, CA, Coastline Metal Finishing provides diverse metal finishing services. They specialize in anodizing, offering Type II sulfuric, Type III hard coat, and phosphoric anodizing, with various dyed colors. Capabilities also include chemical film processing, plating, and abrasive blasting for defense and telecommunications industries.

Garland, TX

Based in Garland, TX, Courter-Hall Company is a family-owned business providing chemical processing and organic finishes since 1961. Serving Tier-1 aerospace customers, the company is recognized for quality and on-time performance. They hold ISO 9001:2015, Raytheon, and Bell-Helicopter approvals, plus ITAR registration, ensuring high standards for industrial finishes.

Bridgeport, CT

Connecticut Anodizing & Finishing Co. Inc., based in Bridgeport, CT, offers comprehensive anodizing services including Type II Anodize, Type III Hardcoat, media blasting, and masking. With generations of craftsmanship, they provide convenient pickup and delivery throughout Connecticut, serving various industrial and commercial clients.

Arcadia, CA

Danco Metal Surfacing offers comprehensive metal finishing services, including anodizing aluminum and titanium, chemfilm, plating, and powder coating. With over 50 years of experience, Danco also provides precision marking and surface preparation. They serve aerospace, medical, dental, commercial, and industrial clients from multiple US facilities.

Warsaw, IN

Based in Warsaw, IN, Danco Medical specializes in titanium and aluminum anodizing for medical devices, orthopedic implants, instruments, and machined parts. They also provide electropolishing, passivation, and Low Friction Chrome Coating. The company is ISO 13485, Nadcap, ITAR, and RoHS REACH certified, ensuring quality and compliance for critical applications.

Houston, TX

Based in Houston, Texas, Diamond M.F. specializes in anodizing services, offering Type II, Type III, and specialized processes. Serving the aerospace, defense, and space industries, they provide certified corrosion protection and durability from their 52,000 sq ft facility, meeting MIL-A-8625 standards.

San Jose, CA

Based in San Jose, CA, Du-All Anodizing dba GMP Plating, INC. provides comprehensive metal finishing services. They specialize in Type II and Type III anodizing, passivation, electropolishing, and chemical conversion coating. The company also offers precision laser marking, delivering high-quality surface treatments for various industrial and commercial applications.

Gold River, CA

Based in Gold River, CA, EDC Specialties offers custom titanium anodization services. The company specializes in creating unique finishes for titanium tools, parts, and hardware. They provide professional anodizing solutions, enabling clients to achieve specific aesthetic and protective qualities for their titanium products.

Oxnard, CA

Based in Oxnard, CA, Elite Metal Finishing, LLC offers comprehensive metal finishing services. These include anodizing (Type II & III), chemical processing, plating, painting, and non-destructive testing. With a second facility in Orlando, FL, they provide technical support, serving demanding clients like Lockheed Martin.

Santa Ana, CA

Based in Santa Ana, CA, Embee Processing offers advanced industrial processing capabilities, including anodizing. With over 70 years of experience, they deliver high-quality finished parts for critical applications. The company primarily serves the aerospace industry, enhancing aluminum components with protective layers.

Hayward, CA

Based in Hayward, CA, Electro-Plating Specialties Inc. is a metal finishing provider specializing in anodizing services. The company offers both Type II (Sulfuric) and Type III (Hardcoat) anodizing in clear, black, and various custom colors, catering to industrial and commercial clients.

Adkins, TX

Wright Metal Finishing LLC provides comprehensive metal finishing services, including Type II (sulfuric acid) and Type III (hard coat) anodizing with various colors. Based in Adkins, TX, the company also offers passivation, electroless nickel, zinc plating, chromate conversion, and powder coating, catering to industrial, commercial, and agricultural applications.

Hamden, CT

Based in Hamden, CT, Giering Metal Finishing provides comprehensive metal finishing services nationwide. With over 70 years of experience, the company specializes in delivering high-quality coatings and advanced solutions for corrosion protection, catering to various industrial and commercial client needs.

Edina, MN

Based in Edina, MN, Hard Anodize, Inc. specializes in high-end hard anodize finishing, offering Type III and Type II anodizing, conversion coating, and masking. With over 45 years of experience, they provide precision coatings certified to AS-9100, ISO-9001, and NADCAP standards for various industrial applications.

Based in Philadelphia, PA, Hillock Anodizing is a NADCAP accredited metal finisher specializing in precision anodizing and plating services. The company handles urgent delivery and critical tolerance requirements for industrial customers, serving prime contractors such as Lockheed Martin, Boeing, and GE Aviation.

Detroit, MI

Based in Detroit, Michigan, International Hardcoat is a full-service anodizer specializing in aluminum anodizing, hardcoat, and chromate conversion coatings. Operating from two facilities, the company offers sulfuric anodizing and Pixodize™, serving diverse sectors including automotive, aerospace, military, and medical industries with precision and durability.

Houston, TX

Based in Houston, TX, Industrial Metal Finishing provides comprehensive industrial finishing services. These include anodizing, phosphating, and chromate conversion, alongside extensive electroplating and spray coating solutions. They serve diverse sectors such as OEMs, petrochemical, oil and gas, aviation, military, and fastener manufacturers.

Fridley, MN

Based in Fridley, MN, INCERTEC Metal Finishing Company provides electroplating, anodizing, heat treating, and cryogenic processing services. The company offers high-capacity metal finishing solutions for primary OEMs in the aerospace, medical, and defense industries.

Burbank, CA

K&L Anodizing provides metal finishing services, including anodizing, with over 75 years of experience. The company offers Nadcap and ISO 9001:2015 Certified processing, utilizing top-line equipment. K&L serves diverse industries such as military, aerospace, medical, and commercial clients.

Southington, CT

Based in Southington, CT, Light Metals Coloring provides comprehensive finishing solutions for light metal alloys like aluminum and titanium. They specialize in Type II and Type III Hardcoat anodizing, electropolishing, chemical cleaning, and passivation, serving diverse industrial applications with high-quality surface treatments.

Lorin Industries, Inc. specializes in batch and coil anodizing of aluminum, offering customizable and durable colors and finishes. They provide Architectural Class I and II coil anodized aluminum with a 70-year warranty, serving architectural, medical, consumer, and transportation applications.

Wadsworth, OH

Based in Wadsworth, OH, Luke Engineering & Anodizing Co. Inc. specializes in anodizing and conversion coatings for aluminum. Established in 1964, it offers over 55 years of experience in hard coat anodizing. The company utilizes one of North America's largest tanks, ensuring consistent quality through a custom process control system.

New Britain, CT

Based in New Britain, CT, Marsam Metal Finishing Co. specializes in chemical processing and applied coatings. Services include anodizing, chemical film, manganese and zinc phosphate, and passivation of stainless steel. They also offer dry film lube, PTFE paint, powder coating, non-destructive testing, precision deburring, and assembly services.

Wichita, KS

Based in Wichita, KS, Metal Finishing Company provides extensive surface finishing and plating services. Their offerings include non-destructive testing, hard metal and aluminum heat treatment, shot peening, and thermal spray. With a focus on industrial applications, they are a direct provider of specialized metal treatment, including anodizing capabilities.

Columbus, OH

Based in Columbus, OH, Mills Metal Finishing Inc. provides comprehensive metal finishing services, including sulfuric acid and hard coat anodizing with various colors. The company also offers powder coating, tin plating, electropolishing, and corrosion resistance solutions like zinc plating and iron phosphate for diverse metal products.

Santa Rosa, CA

Milner's Anodizing, a Nadcap accredited job shop in Santa Rosa, CA, provides premium anodizing, passivation, and surface finishing services. Adhering to US Aerospace and Defense standards, they serve aerospace and commercial clients across Northern California and the Western US, utilizing over 25 years of experience and in-house lab capabilities.

Compton, CA

Morrell's Aerospace Processing, based in Compton, CA, specializes in metal finishing services for aerospace and industrial clients. The company provides anodizing, chemical film coating, painting, and blasting. They also offer comprehensive inspection and chemical cleaning services.

Sun Valley, CA

Based in Sun Valley, CA, NDT Metal Finishing Inc. provides cutting-edge metal finishing and non-destructive testing services, primarily for the aerospace industry. Founded in 2008, the company uses state-of-the-art equipment to efficiently process orders, focusing on customer satisfaction.

Linden, NJ

Based in Linden, New Jersey, Paramount Metal Finishing offers state-of-the-art coating technology, including plating, painting, powder coating, and anodizing services for metal and some plastic products. Established in 1949, the company provides coatings for corrosion protection, RFI shielding, and aesthetic appeal. It is ISO 9001:2015 certified.

Green Bay, WI

Electrochem Solutions, Inc., a Pioneer Metal Finishing Company, offers extensive metal finishing solutions for aluminum alloys, castings, and forgings. They enhance properties like corrosion resistance, wear resistance, and aesthetics for manufacturers and OEMs. Serving aerospace and defense sectors, the company processes millions of parts annually.

Chatsworth, CA

Based in Chatsworth, CA, Plateronics Processing specializes in metal finishing, offering Type II and Type III aluminum anodizing and hard anodize. They provide chromate conversion and plating for aerospace, medical, and defense industries, holding ISO 9001:2015 and AS9100D certifications.

Anaheim, CA

Based in Anaheim, CA, Precision Anodizing and Plating, Inc. is a family-owned company specializing in anodizing, plating, and metal finishing. With over 47 years of experience, Nadcap and ISO9001:2015 certifications, and a 48,000 sq ft facility, they serve aerospace, military, medical, automotive, and commercial industries.

Woonsocket, RI

Based in Woonsocket, RI, Precision Coating offers extensive aluminum anodizing and finishing services. With over 65 years of experience, the company provides complex masking, coating application, and value-added surface treatments. They focus on the medical device industry, helping achieve product engineering and clinical performance goals.

Pomona, CA

Based in Pomona, CA, Precision Metal Processing Inc. provides high-quality metal finishing solutions for diverse industries, including aerospace, military, medical, and commercial sectors. The company offers a variety of services, aiming to be a one-stop shop with fast turnaround times and competitive pricing.

Waterbury, CT

Based in Waterbury, CT, PrecisionX provides high-quality anodizing services for deep drawn and progressive stamped metal parts. They supply high-reliability, precision components to aerospace, defense, medical, electric vehicle, semiconductor, and industrial markets, with AS9100 and ISO 13485 certifications.

Sun Valley, CA

Based in Sun Valley, CA, Prime Plating provides precision electroplating and anodizing services, including hard anodizing, utilizing large tanks at its 30,000 sq. ft. facility. Since 1986, they serve commercial, military, and aerospace industries with high-quality metal finishing to strict specifications.

Clarksville, TN

Quick Turn Anodizing (QTA), LLC specializes in aluminum anodizing, offering Type IIB, Type II sulfuric, and Type III hardcoat. They also provide chromate conversion, stainless steel passivation, and black oxide coating. QTA is ITAR Registered, ISO 9001:2015/AS9100D compliant, with a 3-day average turnaround for diverse US industries.

Nashville, TN

Based in Nashville, TN, SAF is a nationwide aluminum anodizer and metal fabricator, operating since 1946. They provide anodizing, painting, and custom fabrication for architectural aluminum sheet and extruded shapes. SAF serves the building industry, offering comprehensive metal solutions for projects like column covers and wall panels.

Independence, OH

Based in Independence, OH, SIFCO Applied Surface Concepts specializes in selective electroplating services. Their SIFCO Process® includes selective anodizing and brush plating for enhancing component performance. They offer job shop and on-site services, focusing on corrosion protection, wear resistance, and hardness for industrial applications.

Houston, TX

Surface Techniques, Inc., based in Houston, TX, specializes in metal finishing services. They are experts in anodizing and precious metal plating, offering a wide variety of color options for parts. The company serves industrial B2B clients in packaging, food manufacturing, industrial fabrication, oil and gas, and offshore/subsea/ROV industries.

Based in East Greenville, PA, Titanium Finishing Company offers specialized metal coating and anodizing. They provide eco-friendly titanium anodizing for functional and aesthetic applications, alongside hardcoat anodizing for aluminum. With over forty years of experience, TFC serves the military, aerospace, and medical communities.

Based in Reading, PA, US Anodize is a third-generation, family-owned business specializing in custom aluminum finishing. They provide anodizing for enhanced corrosion protection, wear resistance, and excellent dyeing ability. The company also offers aesthetic PERMODIZE®, chromate conversion, and laser engraving, emphasizing high-volume performance and quality service.

Camden, AR

Valence Surface Technologies provides comprehensive product finishing for aerospace, defense, and medical industries in the US. They specialize in chemical processing for aluminum, steel, and titanium alloys, offering direct anodizing expertise. Additional services include NDT, shot peening, plating, and painting.

Waco, TX

Based in Waco, TX, Waco Metal Finishing specializes in aluminum anodizing, stainless steel passivation, and metal finishing services. They offer Type 2 and Type 3 anodizing, clear coat and dyed, adhering to MIL-SPEC 8625 standards. The company provides fast turnaround times, accommodating parts up to 96x42 inches.

Marion, TX

Based in Marion, TX, Warner's Metal Finishers Inc provides comprehensive metal finishing services. They specialize in sulfuric anodizing, offering protective and decorative finishes for various industrial applications. Additional services include Alodine, Iridiate, passivate services, and zinc plating for commercial clients.

Dallas, TX

Based in Dallas, TX, W/S Finishing Corp specializes in aluminum anodize finishes. They utilize a sulfuric acid process for durable, abrasion-resistant coatings up to 1 mil thick. Offering two-step color anodizing for bronze, champagne, and black shades, their facility accommodates parts up to 30 feet long.

Wood Village, OR

Advanced Precision Anodizing is a family-owned business in Wood Village, OR, specializing in Type II and Type III anodizing. They also provide laser marking, media blasting, chromate conversion, passivate, and bright dip services. Holding an FFL license, the company is equipped to serve various industries, including firearms, with quality and precision finishing.

Compton, CA

Based in Compton, CA, AAA Plating & Inspection, Inc. provides comprehensive metal finishing services, specializing in five types of anodizing processes. They also offer cadmium plating, passivation, painting, Ion Vapor Deposition (IVD) of aluminum, and NonDestructive Testing. The company serves industrial clients, committed to high quality and consistent results.

Compton, CA

Based in Compton, CA, Accurate Anodizing provides specialized anodizing services for industrial and commercial clients. The company focuses on applying durable, corrosion-resistant, and aesthetically pleasing anodic coatings to metal parts. They offer precise surface finishing solutions to enhance product performance and longevity for diverse applications.

Roseville, CA

Advanced Metal Finishing, based in Roseville, CA, provides precision metal finishing services for mission-critical components. Serving the aerospace, defense, and medical industries, the company offers high-spec, NADCAP-ready processes. They ensure tight tolerances, full traceability, and rapid turnaround for demanding production schedules.

San Diego, CA

Based in San Diego, California, Anocote Metal Finishing provides comprehensive metal finishing services. They specialize in various anodizing processes, including Type II (clear and color) and Type III hardcoat anodizing, alongside chemical film and passivation treatments. Anocote serves industrial customers requiring high-quality surface treatments for metal components.

Syracuse, NY

Based in Syracuse, NY, Anoplate Corporation provides nationwide metal finishing and anodizing services. They offer a range of surface treatment capabilities to various industries. Established in 1960, the company has extensive experience in specialized plating and finishing processes.

Based in Billerica, MA, AOTCO specializes in comprehensive metal finishing services, including Type II and Type III anodizing and various metal plating solutions. With over 45 years of industry experience, the company delivers high-quality results and fast turnarounds for a wide range of industrial and commercial applications.

Chicago, IL

Based in Chicago, IL, Automatic Anodizing specializes in Type II and Type III anodizing, plus chemical and chromate conversion coating for aluminum. Established in 1947, this ISO 9001:2015 certified company delivers premium finishing solutions, ensuring high quality for various client needs.

North Hollywood, CA

Curtiss-Wright Surface Technologies provides a comprehensive suite of specialized surface finishing solutions, including Type I, II, and III (hardcoat) anodizing. They also offer chemical film, various plating processes, coatings, and heat treating services. Serving critical industries like aerospace, defense, energy, and medical, the company operates multiple facilities across the United States.

Redwood City, CA

Based in Redwood City, CA, Dean's Anodizing provides comprehensive metal finishing services. They specialize in Type II and Type III anodizing, chemical film, passivation, and etching. With over 35 years of experience, they serve industrial clients in medical, aerospace, military, and electronics sectors.

Oceanside, CA

Based in Oceanside, CA, Elite Metal Finishing provides comprehensive metal finishing services. They specialize in Type II and Type III anodizing, offering clear, black, and custom color finishes. The company's processes enhance corrosion resistance, durability, and aesthetic appeal for various industrial and commercial clients.

Houston, TX

Houston Anodizing, based in Houston, TX, provides aluminum anodizing and metal finishing. They offer Type II and Type III (hardcoat) anodizing in clear/colored finishes, compliant with MIL-A-8625F. Serving automotive, military, and aerospace, the company is ISO 9001:2015 registered and NADCAP compliant.

Sacramento, CA

Metal Finishing Group, based in Sacramento, CA, provides a comprehensive suite of metal finishing processes. They offer full-spectrum solutions for critical applications in leading sectors, leveraging extensive capabilities and large-scale operations. With tank sizes up to 12 ft long, they accommodate diverse part dimensions.

San Diego, CA

Based in San Diego, California, Miramar Metal Processing is a comprehensive metal finishing facility. The company specializes in various surface treatment services, including Type II and Type III anodizing, chem film, passivation, powder coating, and wet paint applications for industrial and commercial clients.

Macedonia, OH

Based in Macedonia, OH, PSP Metal Finishing provides comprehensive metal finishing services. Specializing in high-quality Type II and Type III (Hardcoat) anodizing, the company also offers powder coating and plating. They serve industries including aerospace, automotive, and medical, delivering durable and precise finishes for various components.

Oklahoma City, OK

Based in Oklahoma City, OK, Quality One Anodizing, Inc. specializes in Type II and Type III sulfuric anodizing for aluminum components. The company also provides chromate conversion coating, masking, and laser engraving services, catering to various industrial requirements.

Middletown, CT

Based in Middletown, CT, Rayco Metal Finishing Inc offers anodizing, electropolishing, passivation, and various electroplating services. They serve OEM companies, sheet metal fabricators, precision machine shops, and tool & die shops throughout the Northeast. The company is FDA approved for medical instruments and provides certifications to military specifications.

Santa Clara, CA

Based in Santa Clara, CA, Santa Clara Plating Co., Inc. provides high-quality metal finishing services. They specialize in anodizing, electroless nickel plating, chemical films (Alodine), blackening, passivation, and masking. Serving industrial clients across Silicon Valley and the Bay Area, the company is ISO 9001:2015 certified.

Garland, TX

Based in Garland, TX, Texas Precision Plating, Inc. offers comprehensive anodizing services, including Chromic, Sulfuric, and Hard Anodize. Established in 1966, this family-owned company provides a range of plating and finishing options for commercial, automotive, aerospace, military, and government specifications.

Fresno, CA

Based in Fresno, CA, Valley Metal Finishing, Inc. specializes in aluminum anodizing services. Established in 1991, the company leverages over 45 years of industry experience to provide reliable anodizing solutions. They offer typical 48-72 hour turnarounds, with expedited 24-hour options for clients.

Morgan Hill, CA

GMP Plating Inc. is a family-owned metal finishing company based in Morgan Hill, CA. Established in 1978, it provides high-quality plating and anodizing services, including electroless nickel, tin, silver, gold, and copper plating. The company is ISO 9001 and AS9100 certified, serving the high-tech industry.

Anaheim, CA

Based in Anaheim, CA, Platinum Surface Coating offers industrial anodizing services. The company provides Type II (sulfuric) and Type III (hardcoat) anodizing, along with custom finishes and coloring. They serve various manufacturing industries, delivering durable and protective surface treatments for metal components according to customer specifications.

Houston, TX

Based in Houston, TX, Specialty Metal Finishing, Inc. provides high-quality metal finishing services. They specialize in Type II and Type III anodizing, chromate conversion, passivation, and electropolishing. The company serves diverse industries including aerospace, medical, defense, and oil & gas, offering critical surface treatments for various components.

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How to Choose a Company

  • Verify the supplier’s capability for your specific anodizing type; ensure they routinely process Type II sulfuric for decorative finishes or Type III hardcoat for wear resistance, and confirm their ability to meet specific MIL-A-8625 requirements if applicable.
  • For applications requiring extreme reliability, such as aerospace or medical devices, demand proof of Nadcap or AS9100 certifications, along with documented process controls for film thickness, pore sealing, and pre-treatment methods.
  • Insist on understanding their process for managing dimensional growth, especially for parts with tight tolerances; a common red flag is a supplier who dismisses the impact of anodizing on critical features or provides vague estimates without prior experience on similar geometries.
  • Evaluate their quality control procedures for color consistency and dye penetration, particularly for aesthetic parts or those with multiple components that need to match. Ask for statistical process control data and examples of their internal color matching standards.

Frequently Asked Questions

How does anodizing affect the dimensions of my part, and how can I account for it?

Anodizing inherently creates a layer of aluminum oxide on the surface of your part, leading to dimensional growth. Typically, about half of the film thickness penetrates the substrate, while the other half builds up externally. For a standard Type II anodize of 0.0002-0.0007 inches, you can expect an increase in dimension per surface of 0.0001-00035 inches. For critical features, communicate your tightest tolerances and specific surfaces to the anodizer, who may recommend masking, post-anodizing machining, or adjusting pre-anodize dimensions to compensate for this growth.

What are 'racking marks' and how do they impact my anodized parts?

Racking marks are small, localized contact points where your aluminum part is electrically connected to the anodizing rack during the plating process. These areas typically do not receive the anodize coating, leaving a small, un-anodized spot or visual imperfection. While often functionally benign if located in non-critical areas, they can be an aesthetic issue. It's crucial to discuss racking locations with your supplier during design, identifying non-critical surfaces where these marks are acceptable or can be hidden, to avoid unexpected cosmetic defects.

Why is color consistency so difficult to achieve in anodizing, especially across different batches?

Achieving perfect color consistency in anodizing is challenging due to several factors, including variations in the aluminum alloy (even within the same series), minor fluctuations in the anodizing bath chemistry, differences in sealing processes, and dye lot variations. For example, 6061 and 7075 alloys will often take the same dye differently. To mitigate this, provide your supplier with a physical color standard or a precise Lab* color specification. A reputable anodizer will employ spectrophotometers for color measurement and maintain strict process controls, often running control samples with each batch, but some minor variation is always possible.

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