The fix is a 0 5 nitric acid pre dip before the chromate use of a very blue trivalent chromate and close control of the chromate ph.
Zinc plated clear chromate dip.
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.
High salt spray clear a high performance trivalent passivate that can provide over 100 hours of corrosion resistance to white salts per astm b 117 to electroplated zinc.
Yellow chromate a single dip trivalent yellow chromate.
Zinc plating with clear passivation gives all the same advantages of any other zinc plating particularly the addition of considerable corrosion resistance.
No additional top coat is required.
Color is almost like hexavalent yellow.
Offers high salt spray resistance of up to 200 250 hours to white rust.
An easy to use single dip trivalent iridescent yellow red bright chromate.
It also offers some benefits in terms of strength and abrasion resistance.
A clear chromate dip is a protective film applied after electroplating adding corrosion protection.
Zinc plated zinc chromate dichromate thanks very much.
Zinc plating is a popular choice for coating nuts bolts washers metal stampings automotive parts fabricated.
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.
It is similar to galvanizing.
Overall people often choose clear zinc coating because it is both affordable and.
Zinc chromate is usually an organic primer paint that can be spray or brush applied over steel galvanizing or even zinc plating.
Zinc plating performs better than cadmium in an industrial atmosphere but not in a salt atmosphere.
Zinc plating with clear chromate has yellowish discoloration.
Advantages of clear zinc plating.
Zinc plating is an inorganic metal coating that is deposited on a steel using an external electric current.
With trivalent blue bright chromates increases in the ph that lead to values greater than 2 3 1 8 to 2 0 being optimal for most processes.
We can also improve the surface conditions of various metals with processes such as electropolishing passivation and bright dip.
See more on zinc metal plating with zinc plating the coating is only typically 3 microns thick.
Some of our metal finishes include anodizing chromating zinc plating electroless nickel plating tin plating wet paint and powder coating.
Meets automotive and all other industrial standards.
