Zinc Clear Chromate

It is used industrially in chromate conversion coatings having been developed by the ford motor company in the 1920s.

Zinc clear chromate. The deposit is a pleasing finish in itself however it is also an excellent base for paint. Zinc plate with clear chromate per astm b633 affil. Because zinc is a more active metal. The second step is to treat the plated metal with a chemical passivate which adds color.

Citation needed the protective effect of chromate coatings on zinc is indicated by color progressing from clear blue to yellow gold olive drab and black. Zinc dichromate plating provides additional protection for corrosion vs. This is a major project that we are undertaking. Is there any research on a comparison of zinc plating with different chromates.

Link to spec at techstreet type 3 sc 2 sheet is crs 1010 1020 060 thick. Tommy garza quality technician austin texas usa. The first step is to add the zinc plating through the use of electrical current. Zinc plating in general can be broken into two primary steps.

60 000 q a topics education aloha fun topic 2233 clear vs. What is clear zinc plating. I believe it is astm b201 80 affil. Dichromates were originally used as primers for paint until their natural appeal was realized.

These solutions are referred to as chromates hex chrome or passivates tri chrome. Trivalent dichromate conversion coating is a type of coating used to passivate zinc cadmium copper silver magnesium and tin alloys. The chromate coating acts as paint does protecting the zinc from white corrosion thus making the part considerably more durable depending on the chromate layer s thickness. Our zinc and chromate finishes are rohs compatible.

Zinc dichromate remains a superior chromate for primer applications. Zinc chromate zn cr o 4 is a chemical compound containing the chromate anion appearing as odorless yellow powder or yellow green crystals but when used for coatings pigments are often added. Yellow or clear zinc chromate coatings. Type ii refers to a colored yellow olive drab chromate.

Steel components are often zinc plated for corrosion resistance and sacrificial cathodic protection. The iridescence in a dichromate conversion can display different iridescent hues. Zinc trivalent dichromate plating provides a similar finish to the hexavalent finish with the added benefit of rohs compliance. Yellow chromate should get 96 hrs to failure.

Yellow and clear sometimes called white essentially perform the same function as a superior corrosion inhibitor for your metal parts. In general please give me your thoughts on yzp vs clear zinc i really appreciate you taking the time to help us out.