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Trivalent Yellow Passivation
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Trivalent Yellow Passivation

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Trivalent Yellow Passivation is a post-treatment process applied to zinc or zinc-alloy plated parts to enhance corrosion resistance and provide a yellow or gold finish. This process is an alternative to traditional hexavalent chromium passivation, offering environmental and safety benefits while still delivering excellent protective qualities.

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Benefits

  • Enhanced Corrosion Resistance : The passivation layer provides a significant boost in corrosion protection, extending the lifespan of the zinc-coated parts.
  • Aesthetic Appeal : The yellow or gold finish is often used for decorative purposes or to visually distinguish treated parts.
  • Environmentally Friendly : Trivalent chromium is less toxic and more environmentally safe compared to hexavalent chromium, making this process compliant with RoHS and other environmental regulations.
  • Improved Adhesion for Paints and Sealants : The passivated surface is better suited for additional coatings or paints, enhancing overall product durability.

Applications

  • Automotive Parts : Fasteners, clips, brackets, and other components where corrosion resistance is critical, and a yellow finish is desirable.
  • Electrical and Electronic Components : Connectors, terminals, and other parts that require both protection and a distinctive appearance.
  • Industrial Hardware : Screws, bolts, nuts, and other fasteners used in environments where corrosion resistance is necessary.
  • Consumer Goods : Decorative and functional parts in various consumer products, such as appliances and tools.