Surface Treatment Services
MAPT specializes in high-quality surface treatment for metal fasteners — zinc-nickel alloy plating, acid zinc plating, and more — serving automotive fastener and hardware manufacturers. Backed by advanced international technology and our own R&D and QC teams, every process meets the latest environmental regulations and international specifications.
Trivalent Black Zinc
Black-passivated trivalent acid zinc plating with a uniform glossy black finish — good quality at a competitive price, widely used on automotive and hardware fasteners.
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Trivalent Zinc-Nickel Alloy 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.
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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.
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Stainless Steel Whitening
High corrosion-resistant surface treatment for 300-series stainless screws, nuts and hardware — a dual process of bright finishing and native-color passivation that meets demanding fastener requirements.
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Long Screw Zinc Plating
Long-screw surface-treatment specialists: sizes from 120 mm to 1,700 mm, backed by extensive trivalent zinc plating experience, outstanding equipment and reliable quality.
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AI Server Stainless Tubing Whitening
Stainless tubes, manifolds and fittings in AI-server liquid-cooling systems — chemically polished, passivated and sealed for reliable corrosion protection.
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