Trivalent Acid Zinc Plating
MAPT delivers top-quality plating services that meet the highest standards of automotive parts manufacturers, and we keep improving our quality and service to satisfy every customer demand.
- Trivalent chromium passivation in blue-white, yellow and iridescent finishes
- Uniform luster and rich, consistent color
- Cost-effective for high-volume screws and nuts
- RoHS compliant
Zinc Without Passivation
Trivalent chromium passivation is skipped on request; wax or lubricant can be applied in a later step.
Salt spray resistance: 48 hours no red rust
Finishes
Blue-White Zinc
Acid zinc with trivalent blue-white passivation: a bright, uniform finish and the most widely used general-purpose corrosion protection.
Salt spray resistance: 96 hours no white rust / 720 hours no red rust
Wax or lubricant can be added on request to meet friction-coefficient requirements.
Iridescent Zinc
Acid zinc with trivalent iridescent passivation: rich coloring and high cost-efficiency for mass-produced screws and nuts.
Salt spray resistance: 24–48–240 hours no white rust / 120–1,500 hours no red rust
Wax or lubricant can be added on request to meet friction-coefficient requirements.
Yellow Zinc
Acid zinc with yellow passivation: a full golden finish offering solid corrosion protection and easy identification.
Salt spray resistance: 120 hours no white rust / 500 hours no red rust
Wax or lubricant can be added on request to meet friction-coefficient requirements.
