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Sticky surface after anodising



(-----) 2006

Sometimes after anodising we obtain a sticky fell to the surface of our aluminium parts. Has anyone come across this issue and is their a method of eliminating this.

Denis Hoyle
anodiser - Nelson, England
^

Ed. note: Our readers have most often attributed this to improper sealing. Please try searching the site for "sticky seal".


2006

Usually the surface is sticky immediate after anodising i.e that indicates either no sealing or insufficient sealing. A die absorption test will confirm this. The remedy is to put back the anodised material to Seal tank for the time require in accordance with the total film thickness.

Regards.

Srimay Basu
- Dubai, U.A.E.
^


2006

I reckon this is due to poor sealing. Check you process parameters and specifications and just to prove the point, try dying the anodised layer and seeing if it stays fast.

trevor crichton
Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
^


2006

Inadequate rinsing after anodising often can contribute to the problem faced by you. Try at least 2 rinses and thereafter proper sealing as already suggested by other readers.
Regards,

Malvinder Pal Singh
- Delhi, India
^



April 17, 2012 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. Hi,

I'm adding new sealing tank with nickel acetate (warm sealing with temp 60 - 70 °C) to speed up my productivity. However I'm still using my old sealing/old tank (cold sealing, nickel fluoride especially for my EC coloring). Sometimes I found some pieces sticky for clear and color coating upon warm sealing or cold sealing. Is there someone tell me what is the reason? Is it because I'm using the same rinsing for both seals? Please advise.

Roni Panjaitan
- Surabaya, East Java, Indonesia
^


April 19, 2012

A. Nickel acetate and acetic acid are "sticky", you are not rinsing it off.

robert probert
Robert H Probert
Robert H Probert Technical Services
supporting advertiser
Garner, North Carolina
probertbanner
^


April 20, 2012

A. Sticky = poor sealing.

jeffrey holmes
Jeffrey Holmes, CEF
Spartanburg, South Carolina
^

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