Zinc Clear Chromate

The first step is to add the zinc plating through the use of electrical current.

Zinc clear chromate.

Tommy garza quality technician austin texas usa. Zinc plate with clear chromate per astm b633 affil. This is a major project that we are undertaking. 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.

Dichromates were originally used as primers for paint until their natural appeal was realized. Link to spec at techstreet type 3 sc 2 sheet is crs 1010 1020 060 thick. The deposit is a pleasing finish in itself however it is also an excellent base for paint. Type iii refers to a clear blue brite chromate passivate.

Zinc dichromate plating provides additional protection for corrosion vs. Yellow or clear zinc chromate coatings. Type ii refers to a colored yellow olive drab chromate. 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.

The iridescence in a dichromate conversion can display different iridescent hues. These solutions are referred to as chromates hex chrome or passivates tri chrome. Yellow chromate should get 96 hrs to failure. Zinc trivalent dichromate plating provides a similar finish to the hexavalent finish with the added benefit of rohs compliance.

60 000 q a topics education aloha fun topic 2233 clear vs. In general please give me your thoughts on yzp vs clear zinc i really appreciate you taking the time to help us out. Steel components are often zinc plated for corrosion resistance and sacrificial cathodic protection. Trivalent dichromate conversion coating is a type of coating used to passivate zinc cadmium copper silver magnesium and tin alloys.

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. I believe it is astm b201 80 affil. It is used industrially in chromate conversion coatings having been developed by the ford motor company in the 1920s. Because zinc is a more active metal.

Zinc plating in general can be broken into two primary steps. What is clear zinc plating. Zinc dichromate remains a superior chromate for primer applications. 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.

Our zinc and chromate finishes are rohs compatible. Is there any research on a comparison of zinc plating with different chromates.