Summary for reduce anodize thickness Discussion
Reduce anodize thickness by leaving in tank with power off is not presented as a practical way to strip or thin the coating. The thread excerpt provided contains only the question title and no answer text, so there is no documented guidance from named contributors to summarize. Based on the question alone, the issue appears to be whether anodized parts can be left in the anodizing tank without power in hopes of reducing coating thickness, but the source excerpt does not confirm any result, method, or recommendation. Because no replies are included, there are no conflicting views or expert cautions to attribute. The safest reading of the available source is that the question is unresolved in the excerpt and should not be treated as validated process advice.
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Aluminum How-To
“Chromating – Anodizing – Hardcoating”
by Robert Probert
You’ll love this book. Finishing.com has sold a thousand copies without a 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?
Ninj JJL
– Steelville Missouri
September 13, 2023
This is a meeting place for camaraderie & sharing, not a free consultancy. So some readers don’t engage with anonymous posters.
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.
P. H. Wheeler
– Czestochowa, Poland
September 14, 2023