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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.

K.CHANDRASEKARAN
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

SK Mishra
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.

D. Wiethoelter
- 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.

ANIL PAIKRAO
- MUMBAI, INDIA

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