Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
-----
Reduce anodize thickness by leaving in tank with power off?
finishing.com is made possible by ...
this text gets replaced with bannerText
this text gets replaced with bannerText
Aluminum How-To"Chromating - Anodizing - Hardcoating"
by Robert Probert
Also available in Spanish
You'll love this book. Finishing.com has sold almost a thousand copies without a single return request :-)
Q. Type II Anodize of 7075 Aluminum. If the anodize is too thick is there a way to thin the coating safely without stripping?
I have been a chemical processor for 23 years and I am pretty sure you can leave unsealed aluminum in the sulfuric bath immediately after voltage is off for an extended time and the anodize will very slowly remove -- am I correct?
- Steelville Missouri
September 13, 2023
Ed. note: This forum enjoys the warm aloha of real names. People who offer their real name may be less likely to engage with those who don't.
A. Yes, it will be slowly removed if you do that...
But it will be also ruined, because the pore walls will erode in such a way as to leave the surface with a powdery "smut", which will be even more aggravated by subsequent sealing.
Sorry, there is no good way to partially "un-anodize" an anodized part's anodize thickness, short of stripping the coating and redoing it from the beginning.
- Czestochowa, Poland
September 14, 2023
(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)
Q, A, or Comment on THIS thread -or- Start a NEW Thread
Q, A, or Comment on THIS thread -or- Start a NEW Thread