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"Effective hard anodize mask sought"
My company manufactures aluminium prismatic components for the aerospace industry. We currently employ a brown wax mask in order to prepare parts for the hard anodizing process. However, the application and removal of the wax is time consuming and is thought to be causing acid attacks on the component during its removal.
Can anybody out there recommend an improved mask that may assist us?
Many thanks for your time.Ian Jones
- Wolverhampton, England
Check if your folks 'reuse' the wax by putting the wax from the de-wax tank back into the wax tank. If they do you may well of found your problem. We use wax and have no problems, but we never 'reuse' the wax and never put wax removed from cut back operations back in the wax tank.
surface treatment shop - Stroud, Glos, England
Ian, apart from waxes there are organic resin "Stop-offs" available from most of the larger Metal Finishing Suppliers.
Good luck.Patrick Wm. Mc Ilvena
Macdermid - Melbourne, Victoria, Australia
Thanks for your help guys.Ian Jones
Chromic Anodize or Type II conventional sulfuric acid anodize first, seal very well, grind off the areas to be hard coated, then hard coat anodize. The chromic acid anodizing will mask adequately. AES Proceedings 1958, Dr Harold Weisner then of Bendix Kansas City.
Robert H Probert
Robert H Probert Technical Services
Garner, North Carolina
Have you tried to use a masking disc, such as aluminum or lead foil discs? They can be cut to shape and will hold up well in your process. There are various polyester and vinyl tapes that can also do the job, though the quality of the vinyl is important, and the cost of polyester can be prohibitive.Ty Sarajian
- Brookfield, Wisconsin
February 4, 2010
I am a tool designer for a company in the States that specializes in making precision molded products for selective surface treatment. Aviation in particular is our bread and butter. I just happened to stumble on this thread. I apologize for being vague or if this post is invasive but I just did not see any recommendations for custom hard tooling in the responses.
- Avon Indiana
December 8, 2010 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread
HOW CAN I PROTECT ALUMINUM FROM HARD ANODIZE(TYPE 3) USING CHROMIC ANODIZE(TYPE 1)?ALI GHANEM
PLATING SHOP EMPLOYEE - ISRAEL