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Manganese phosphating is too red

2007

Dear all

Please clarify my questions?

We are doing Mn phosphating on sg iron. Product is almost as-cast product only. We are getting red color shade after phosphating if we did phosphated on normalized parts instead of as cast parts.

What can I do to avoid such color appearance of red after phosphating?

ARUMUGAKUMAR
SUNDARAM FASTENERS LTD,CHENNAI - CHENNAI, INDIA

2007

Dear Aru,
You should have to use de-watering type oil after giving last hot water rinse.

regards,

Milind Padwal
- Pune, India

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