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topic 6811

Anodize type III clear - sticky


periodically, complaints of a sticky feel to anodize type III coating have been experienced. this is unacceptable to our customer. inspection at line QC station does not detect this condition. anodize coating is .001"-.002" thick, is clear and unsealed per Mil A 8625. final rinses following anodize solution are: clean water rinse (CWR), CWR and spray rinse. with forced warm air dry. help - any thoughts, suggested cause and corrective action thanks

norma kemm
- denver, colorado,usa

First of two simultaneous responses-- (2000)

We do Type III Hardcoat anodize here also, and a sticky feeling is absolutely normal & expected on unsealed Hardcoat.

David A. Kraft
- Long Island City, New York

Second of two simultaneous responses-- (2000)

Pretty simple one to answer...seal the parts. Unsealed anodizing is often very tacky to the touch, especially just after processing.

Marc Green
Marc Green
anodizer - Boise, Idaho


start to worry if your unsealed hard anodised do not feel tacky especially when the parts are warm & dry as they will suck the moisture out of your fingers & feel tacky

Keith Tranmer
engineering services - England

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