Our zinc and chromate finishes are rohs compatible.
Zinc clear chromate.
This is a major project that we are undertaking.
Zinc trivalent dichromate plating provides a similar finish to the hexavalent finish with the added benefit of rohs compliance.
Is there any research on a comparison of zinc plating with different chromates.
Zinc plating in general can be broken into two primary steps.
Zinc dichromate remains a superior chromate for primer applications.
Dichromates were originally used as primers for paint until their natural appeal was realized.
Trivalent dichromate conversion coating is a type of coating used to passivate zinc cadmium copper silver magnesium and tin alloys.
The first step is to add the zinc plating through the use of electrical current.
Zinc plate with clear chromate per astm b633 affil.
Steel components are often zinc plated for corrosion resistance and sacrificial cathodic protection.
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.
Yellow or clear zinc chromate coatings.
Because zinc is a more active metal.
It is used industrially in chromate conversion coatings having been developed by the ford motor company in the 1920s.
Link to spec at techstreet type 3 sc 2 sheet is crs 1010 1020 060 thick.
Yellow chromate should get 96 hrs to failure.
60 000 q a topics education aloha fun topic 2233 clear vs.
Tommy garza quality technician austin texas usa.
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.
Type ii refers to a colored yellow olive drab chromate.
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.
These solutions are referred to as chromates hex chrome or passivates tri chrome.
Yellow and clear sometimes called white essentially perform the same function as a superior corrosion inhibitor for your metal parts.
The deposit is a pleasing finish in itself however it is also an excellent base for paint.
I believe it is astm b201 80 affil.
In general please give me your thoughts on yzp vs clear zinc i really appreciate you taking the time to help us out.
What is clear zinc plating.
Type iii refers to a clear blue brite chromate passivate.
The second step is to treat the plated metal with a chemical passivate which adds color.
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.
