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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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Hard chrome plating defects - Reg
Can anybody throw some light on the effect of Manganese sulfide Inclusion streaks in substrates up to 0.2 mm length on Hard Chrome plating on Hardened Ball bearing steel substrate and its implications on plating quality with reference to plating defects like pitting, Roughness, peel off etc.
thanks in advance.
R&D, METALLURGIST - COIMBATORE, INDIA
2005
2005
Can you throw some light on what motivates the question, Mr. Chandrasekaran? You are experiencing plating defects like pitting, roughness, and peel off? And you are seeing these sulfide inclusions? So you are suspecting them? Were you satisfactorily plating a different alloy before? Or the same alloy from a different supplier? Has anything else changed?
In Larry Durney's "Trouble in Your Tank?", 'define the problem' is step 2 (right after step 1: Don't Panic) in a 12-step methodical troubleshooting process. It's hard to do anything but flail around if we lack the key facts of the situation. Please get back to us with more. Thanks!
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
May 22, 2008
Dear sir,
I am facing the less hardness in my Hard chrome plating. please help.
Regards
employee - New Delhi, India
May 22, 2008
Hi, S K. You've given us nothing to work with yet. If you want to just review a troubleshooting list yourself, the Canning Handbook is pretty good at this. Good luck.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
August 18, 2010
Dear K.CHANDRASEKARAN
No, MnS has no impact on adhesion of chrome. You may find pits in the chrome layer as the MnS is solved by the Chromic Acid and an increase of trivalent chrome.
Best Regards, Dirk.
- Hamburg, Germany
September 14, 2011
DEAR SK MISHRA,
LOW HARDNESS MAY BE DUE TO HIGH TEMP OF BATH AND LOW CURRENT DENSITY.
PLEASE CHECK FOLLOWING PARAMETERS:
1.BATH TEMP
2.sulfurIC ACID CONTENT
3.CURRENT DENSITY.
PLEASE MAINTAIN ABOVE PARAMETERS. I AM CONFIDENT THAT YOUR PROBLEM WILL BE SORTED OUT.
- MUMBAI, INDIA
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