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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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Haze problem in Chrome plating
Q. I have been in the plating business for 35+ years. I have been a hands on person plating just about every metal you could think about. So I have done trouble shooting over the years. Currently I am having a problem with a haze in the low current density area on flat surfaces. I have tried raising and lowering the temperature, raising and lower the current with know success. I am currently working with a hull cell raising and lowering the sulphate. We have omitted any pre-plate so we know it's in the Chrome. Any ideas out there?
Warren Levy- Danbury, Connecticut, USA
May 23, 2012
A. Some possibilities: Increased rectifier ripple? Intermittent contact? High chloride?
Are you using a fluoride catalyst? Boric acid supplemental catalyst? Fume control agent?
IS throwing power decreased? Are you entering at full current? Does amperage drop off during plating?
Jeffrey Holmes, CEF
Spartanburg, South Carolina
First of three simultaneous responses -- May 29, 2012
A. Haze problem was eliminated by the addition of Barium to reducing the sulphate.
Warren Levy- Danbury, Connecticut, USA
Second of three simultaneous responses -- May 30, 2012
A. Hi,
Check the rectifier for the DC current, maybe you have some AC current in it. Also the chloride content can be a little too high.
Regards
Anders Sundman
Anders Sundman
4th Generation Surface Engineering
Consultant - Arvika,
Sweden
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