Zinc is an electrolytic plating process that acts as a sacrificial coating to protect the substrate from corrosion. A conversion coating of chromate can be applied after zinc plating to increase the level of corrosion resistance.
Zinc plating with chromate can also be used to improve adhesion of secondary paint operations. Threaded features benefit from zinc plating because of its anti-galling characteristics. Zinc plating with black chromate offers better corrosion resistance and anti-galling characteristics than black oxide.
The zinc plating process can be considered an excellent primer for paint surfaces, with the paint protecting the zinc, giving a lasting protection. Rust, which gets under paint films and lifts them from the steel, will be inhibited from forming because of zinc plating. Should the part require longer corrosion protection, depending on end use, zinc chromate conversion coatings are used.
Colored Conversion Treatment Non-RoHS Compliant
- Clear to Blue Hue
Colorless Conversion Treatment RoHS Compliant
ASTM B633 Type I, II, III & V
REACH, ELV & WEEE Compliant (Types I, III & V only)
Sacrificial Corrosion Protection
Cost Effective Corrosion Resistance
Color Identification (offer black, yellow, bluish/clear available)
Max Part Size
48" x 30" x 24"
35 pounds per part