Zinc Yellow Chromate Plating

The finish has outstanding resistance to salt spray greatly surpasses the normal 96 hour salt spray resistance specified for yellow chromates on zinc.

Zinc yellow chromate plating.

Yellow chromate solution 4oz. Coatings shall be continuous free from. We can also improve the surface conditions of various metals with processes such as electropolishing passivation and bright dip. 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. Yellow zinc plating vs. Zinc plus yellow hexavalent free chromate part suffix zc. Trivalent dichromate conversion coating is a type of coating used to passivate zinc cadmium copper silver magnesium and tin alloys.

Zinc trivalent dichromate plating provides a similar finish to the hexavalent finish with the added benefit of rohs compliance. These hues can appear to be yellow green red blue and etc. Trivalent yellow and hexavalent yellow. Iridescent yellow chromate after preparing the part to accept the process the part is simply dipped into a solution for a few minutes.

The yellow chromate is a yellow bronze iridescent finish on plated cadmium and zinc. Yes zinc and yellow dichromate per astm b633 type ii fe zn 12 is a good way to specify plating on a part print type ii is for colored chromates like zinc yellow. Plating specifications general information page 8 reference only april 2018 chemical film chromate mil c 5541 coatings for aluminum zinc silver and cadmium. To improve those older zinc pot metal.

I was hoping to reach out to you to help me with this research. If you were specifying zinc with clear chromate you would have to specify type i. A discussion started in 2011 but continuing through 2018. I am trying to persuade our engineering department to allow us to make the switch to have our hardware clear zinc plated.

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. Liquid concentrate is used at 0 5 to 3 by volume in water at 65 to 90 f. The iridescence in a dichromate conversion can display different iridescent hues. Color can vary from colorless to iridescent yellow brown.

Great lakes metal finishing inc has two zinc yellow plating options. Astm b633 sc1 type ii scope this specification covers electrodeposited zinc coatings as applied to steel copper brass and bronze parts to protect them from corrosion.