The authoritative public forum
  for Metal Finishing since 1989
-----

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
2000

---

First of two simultaneous responses--

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
2000

---

Second of two simultaneous responses--

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

Marc Green
anodizer - Boise, Idaho
2000

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
2000