Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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IRON MANGANESE PHOS COATING

I need to know the what purpose an iron-manganese-phosphate coating serves on a pump gerotor. Isn't this a soft coating which will wear off fairly quickly? The application is automotive powertrain and my company is in the process of quoting, and I am trying to get a little bit of information.

Glen Saeger
- Columbus , Indiana, USA
2003

I am not an automotive engineer, and cannot reply with authority. But I was involved with the supply of many manganese phosphate installations in my career and always understood the coating to be for the purpose of break-in protection, so hard metal does not gall hard metal before lubricants have a chance to protect the surfaces.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003

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