This directory lists 86 zinc plating companies across the United States, from high-volume automated barrel lines to specialized manual rack plating facilities.
Buyers in this space are typically solving problems related to corrosion protection for ferrous metals, enhancing part appearance, or preparing surfaces for subsequent painting. This involves specifying the correct zinc deposit thickness, the type of chromate conversion (e.g., trivalent clear for RoHS compliance, or yellow for enhanced protection), and ensuring adequate hydrogen embrittlement relief for critical components.
Zinc plating suppliers range from large, multi-process finishing houses offering a full suite of services including electropolishing and anodizing, to smaller, highly specialized shops focusing exclusively on zinc and zinc alloys. Some cater to high-volume automotive runs with automated lines, while others specialize in complex, intricate parts requiring meticulous rack plating and specific masking operations for industries like aerospace or medical.
To ensure a successful engagement, buyers should come prepared with detailed part drawings, material specifications (including heat treatment status), required deposit thickness (e.g., 8-12 microns), desired chromate type, any post-treatment requirements, and performance standards such as specified salt spray hours (e.g., 96 hours to red rust). Suppliers will often inquire about the application and end-use environment to recommend the most suitable plating system.
A significant trend in the zinc plating industry is the continued shift towards environmentally friendlier processes. This primarily involves the widespread adoption of trivalent chromium passivation as a replacement for hexavalent chromates, driven by global regulations like RoHS and REACH, pushing platers to invest in new chemical lines and process controls while maintaining equivalent corrosion resistance.