Zinc Yellow Chromate Plating

The iridescence in a dichromate conversion can display different iridescent hues.

Zinc yellow chromate plating.

Zinc dichromate remains a superior chromate for primer applications. Liquid concentrate is used at 0 5 to 3 by volume in water at 65 to 90 f. Trivalent dichromate conversion coating is a type of coating used to passivate zinc cadmium copper silver magnesium and tin alloys. The yellow chromate is a yellow bronze iridescent finish on plated cadmium and zinc.

Steel parts requiring embrittlement relief after plating are baked according to industry standards. Some of our metal finishes include anodizing chromating zinc plating electroless nickel plating tin plating wet paint and powder coating. I am trying to persuade our engineering department to allow us to make the switch to have our hardware clear zinc plated. Yellow zinc plating vs.

If you were specifying zinc with clear chromate you would have to specify type i. We can also improve the surface conditions of various metals with processes such as electropolishing passivation and bright dip. Coatings shall be continuous free from. Our unique trivalent yellow passivate is ideal for our customers who require their products to be ultraviolet uv stable as our coatings do not contain dye.

These hues can appear to be yellow green red blue and etc. Yellow chromate solution 4oz. Trivalent yellow and hexavalent yellow. Zinc plus yellow hexavalent free chromate part suffix zc.

The zinc the chromate react to form the new colors. Plating specifications general information page 8 reference only april 2018 chemical film chromate mil c 5541 coatings for aluminum zinc silver and cadmium. Iridescent yellow chromate after preparing the part to accept the process the part is simply dipped into a solution for a few minutes. Zinc trivalent dichromate plating provides a similar finish to the hexavalent finish with the added benefit of rohs compliance.

Great lakes metal finishing inc has two zinc yellow plating options. I was hoping to reach out to you to help me with this research. A discussion started in 2011 but continuing through 2018. The finish has outstanding resistance to salt spray greatly surpasses the normal 96 hour salt spray resistance specified for yellow chromates on zinc.

Color can vary from colorless to iridescent yellow brown. To improve those older zinc pot metal.