I am in need of as much information as i can get about the chemical composition of coatings.
Zinc yellow chromate plating specifications.
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.
Color can vary from colorless to iridescent yellow brown.
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.
If you were specifying zinc with clear chromate you would have to specify type i.
We also currently do hexavalent and trivalent yellow zinc plating.
As a rule the darker the chromate the more corrosion resistant the finish with the same amount of plated thickness.
Link to spec at techstreet that states you should get at least 24 hrs to white corrosion from a single dip clear blue brite chromate in a salt spray cabinet.
Specs for chromate zinc coatings 2002 q.
Yellow chromate should get 96 hrs to failure.
Type ii refers to a colored yellow olive drab chromate.
Coatings shall be continuous free from.
Specifically for the following coatings.
Springs having a hardness over rc 40 must be given anafter plating baking of 375 25 f for 3 hours.
Zinc plus yellow hexavalent free chromate part suffix zc.
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.
90040 plating specifications for nickel chrome zinc we at valley plating works inc feel that customer satisfaction is our number one priority.
Valley plating works inc.
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.
Steel parts requiring embrittlement relief after plating are baked according to industry standards.
Type iii refers to a clear blue brite chromate passivate.
I believe it is astm b201 80 affil.
Yellow can be used as is or as a paint base.
We offer many plating methods for various industries and offer the best available technology while reducing excessive.
No matter the plating thickness bake cycle chromate or salt spray requirement glmf will deliver exactly what is required to meet your specifications.
The majority of the work performed at glmf is plated to a customer s individual zinc or zinc nickel plating specifications.
