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

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Alkali washing problems

Dear sir, while doing 0.5% hot alkali washing of aluminium components machined by using neat cutting oil, pH of the alkali dropped to 4 pH from 8 pH. why? After alkali wash, components undergo anodizing treatment. Can I use kerosene vapour degreasing instead of alkali?

Regards,

A.JOTHIMANI
Lubricants industry - CHENNAI, TAMIL NADU, INDIA
2004

No. Use vapor degreasing before alkaline cleaning rather than as a substitute for it.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004

Hi,

If your lubricant is emulsified , pre wash with hot water then use an inhibited alkaline cleaner. or follow TED'S vapour degreasing.

Hadi Khosravi
- Tehran, Iran
2004

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