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  for Metal Finishing since 1989
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Chroming Defects

adv.    

2007

I'm an ISO Coordinator in this company the producing knitting parts. I am handling quality improvement program at which currently working to reduce the defects in chroming process.

We're having a problem that is called white head - white color appears at the top of the part after chroming.For me I believe it would not come from the setting of the parts in the chroming clamps or jigs. It may be caused by the setting of Voltage/Ampere/Chroming time.
What do you think it the cause of this white color?

Uzaimi Musa
ISO Coordinator - Klang, Selangor, Malaysia

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Hi, Uzaimi. You call it "white head", but others might call it whitewash, or burning, or something else. We just don't have enough to go on. Is this a hard chroming process? Have you successfully plated them in the past? Can you send a picture?

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2007

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Please reduce your bath temp. & maintain it up to 56 - 60 °C reduce the current and increase the time in appropriate ratio.
Yudhbeer Singh & Kuldeep

Kuldeep Singh
- Pantnagr , Uttrakhand (India)
2007

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How many mg copper per 1000 amp/hr emission?

Popatbhai B. Patel
electroplating consultant - Roseville, Michigan
February 6, 2008

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Hi, if the parts are bright nickel , them flash chrome for a decorative finish, then the white marks could be caused by a break of contact of power during the flash chrome cycle, or burnt, or even because the chrome is too cold.

If the parts are hard chrome plated , you can sometimes get the white marks due to poor jigging contact - too much heat being generated at the point where the jig and component meet.

Jay Smith
- Essex, UK
March 16, 2008

adv.