Zinc Chromate Plating Specifications

Springs having a hardness over rc 40 must be given anafter plating baking of 375 25 f for 3 hours.

Zinc chromate plating specifications.

Astm b 633 type ii vs. Zinc plating plus yellow chromate coating on steel sae j81 zinc plate and yellow zinc dichromate coating to meet ford wsb m10p10 a3 and wsd m1p85 a2 on aisi 12l14. We also offer metal plating solutions to additional specifications such as ams mil astm sae and customer specifications. A discussion started in but continuing through 2018.

Zinc should be deposited directly on the base metal nickelis permissible undercoat if base metal is a corrosion resisting steel parts having a hardness greater that rc 40 must be given a heat treatmentprior to plating. Below is a list of specifications that are most often provided by techmetals. Specs for chromate zinc coatings 2002 q. Color can vary from colorless to iridescent yellow brown.

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. 90040 plating specifications for nickel chrome zinc we at valley plating works inc feel that customer satisfaction is our number one priority. Trivalent yellow meets automotive and rohs specifications. Techmetals also offers r d optical coatings medical coatings large id od grinding areas with 20 ton capacities.

Valley plating works inc. We are getting poor coverage on the as cast surface of some steel castings using a yellow zinc chromate. I am in need of as much information as i can get about the chemical composition of coatings. Specifications thickness comments qq n 290a class 1 grade e class 1 grade f class 1 grade g 0006 min 0004 min 0002 min.

Plating specifications general information page 8 reference only april 2018 chemical film chromate mil c 5541 coatings for aluminum zinc silver and cadmium. Steel parts requiring embrittlement relief after plating are baked according to industry standards. Zinc plus yellow hexavalent free chromate part suffix zc. Yellow can be used as is or as a paint base.

Coatings shall be continuous free from. Zinc plating with clear passivation gives all the same advantages of any other zinc plating particularly the addition of considerable corrosion resistance. Chromate conversion coating or alodine coating is a type of conversion coating used to passivate steel aluminium zinc cadmium copper silver titanium magnesium and tin alloys. As a rule the darker the chromate the more corrosion resistant the finish with the same amount of plated thickness.

Specifically for the following coatings. P 1265 the coating serves as a corrosion inhibitor as a primer to improve the adherence of paints and adhesives as a decorative finish or to preserve electrical conductivity.