Metal finishing Q&As since 1989

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Best cleaning or prep method for 12L14 machined material to be trivalent zinc chromate plated

2005

Hello,

I have seen much on the proper cleaning of 12L14, but am interested in what may be the best cleaning method from a zinc plating standpoint. The product is screws.
I am also interested in knowing what cleaning methods to stay away from.

Thank for your help.

Ken Greenwood
metal products fabrication - Rochester, New York

Since it is a leaded metal, your acid etch needs to be a fluoboric acid etch. A normal caustic cleaner should be useable. If you use a silicated one, do not let it dry on the parts as it is difficult to get off. Excellent rinsing is a must! An absolute must because the threads tend t hold solution. I assume that you are going to use a barrel plating method.

James Watts
- Navarre, Florida
2005