Thread 509/62
Want to strip trivalent chromate but not the zinc plating
as we have non-cyanide zinc bath the plated component is dipped in trivalent passivation and the same job got rejected due to some reasons I want to remove passivatio only without affecting the plating tell me is there is any way.
Jacf Petermanager - India
publicly reply to Jacf Peter
You can remove it by caustic soda ⇦liquid caustic soda in bulk on Amazon [affil link]
Hatem Shaker- Cairo, Egypt
January 21, 2009
publicly reply to Hatem Shaker
You have to be very careful using caustic as it will also remove the zinc if left in too long or if the caustic is too strong. Consider using a 1 pound per gal of bicarbonate of soda at about 100F and then add tiny amounts of caustic soda ⇦liquid caustic soda in bulk on
Amazon [affil link]
to increase the rat of reaction as required.
Also, You can wet blast the chromate off. We had a wet blast cabinet and added a handful of 600 grit aluminum oxide and a couple of ml of liquid soap and it worked extremely well.
- Navarre, Florida
January 23, 2009
publicly reply to James Watts
Q, A, or Comment on THIS thread -or- Start a NEW Thread