Letter 15046

Zinc passivation  

++

I have a customer that calls out zinc passivate as the finish on their cold rolled steel (1018 steel)on a small hat section bracket job. We do a lot of gold, clear and black zinc jobs (through outside process platers) and have never heard of zinc passivate. All of our platers are dumbfounded by this callout and have no idea what it is either. Can anyone help me to understand what this process is and possibly where I could get this done?

Thank you.

Ken Stevens
- Livermore, CA, USA

++

The process of chromate conversion coating of zinc plated parts is sometimes called passivation. I'm virtually sure the customer is looking for zinc plating followed by chromate conversion coating; but I have no idea whether s/he wants clear or yellow or some other color.

 
Ted Mooney, P.E.
finishing.com Inc. - Brick, NJ

++

Zinc plated steel is almost always a bright, silver colored finish. Chromate conversion coatings are applied for increased corrosion resistance. The chromate conversion coatings are available (usually) in blue, yellow, olive drab, black etc. Another name for the chromate conversion coating is passivate.

Vic Waldman
- Naugatuck, CT

Dear Reader, please --
Post a question on a different subject.
 
Answer or follow-up on this subject (in non-commercial fashion).
 

Legal disclaimer boilerplate button

List of Directories
Jobshops Directory button Environmental Directory button Equipment Directory button Consultants Directory button Chemicals Directory button Test Directory button Help-Wanted Directory button About Advertising button Classifieds Directory button Booklist button

 

Link to Del.icio.us button Save This Page (why?)    -    Home    -    ©1995-2009 finishing.com