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Hard chrome 316 stainless steel

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Hi I work for Park Industries in perth, the solution I use is Aotech hr70 hard chrome, we specialize in hydraulic rams, I have poor adhesion on stainless steel when grinding (chrome peeling) any help overcoming this problem would be appreciated

Paul Court
Perth WA Australia

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First of two simultaneous responses -- +++++

Everyone wants to blame the xxxx plater. If their plating passes required QC tests, then the problem is the grinder!
The grinding shop is where almost all of the problems like this lie. Too deep a cut per pass, wrong feed and/or speeds, wrong wheel grit or resin and inadequate or wrong coolant are the most common causes.
Management is the ultimate cause for not having done their homework on wheels, and feeds/speeds or by allowing or causing grinder operators to rush the operations.

James Watts
- Navarre, Florida

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Second of two simultaneous responses -- +++++

Paul,
Some possible causes of imperfect adhesion are:

a) presence of grease or oxides on the surface
b) interrupted current supply
c) failure to etch the part or incorrect etching solution

you have to tell us your full process before we can hazard a guess

kind regards,

Peter Van de Luecht
MacDermid - Melbourne, Vic, Australia

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September 30, 2010

Hi,I'm new to hard chroming business in Malaysia, and finding solution to hard chrome stainless steel and aluminum. I'm told that neither of these metals can be hard chromed. Is it true? Because I've learned that some people are chroming it.

Darren Teoh
plating shop owner - Penang, Malaysia.
  ^- Privately contact this inquirer -^

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October 4, 2010 Hi,Darren. Both stainless steel and aluminum can be hard chromed, but will require different pretreatment sequences than steel requires. Not all plating shops will be familiar with these pretreatments. Guffie's book is a good introduction => Another thing to remember is that stainless steel and aluminum are much softer than hardened steel. Chrome plating is often applied to hardened steel, and it can give a very hard and wear resistant surface. But if the underlying metal is soft and the chrome plating is thin, the plating will simply crack like the hard shell of an egg. Regards, Ted Mooney, P.E. RET finishing.com Brick, New Jersey

Hard Chromium Plating Robert K. Guffie

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December 20, 2011

Q. We are trying to plate hard chrome on stainless steel type 660 (also referred to Nitronic 60) we are close but still having small spots of adhesion issues. Thoughts on how to activate would be helpful.

Chris Basti
- New Hampshire, USA

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December 22, 2011

You might try a Woods nickel strike under the chrome. It helps on high nickel SS.

You will save a lot of time and get more replies if you let us know what you have tried. Most will not answer because invariably it comes back "that is what I tried".

James Watts
- Navarre, FL