Common anodize defects++
We are creating a cosmetic standard for anodized aluminum parts that go on our product. I am looking for a list of common defects that can occur with this process for inclusion in our standard.Floyd Goshorn
- East Troy, Wisconsin
You need to purchase Arthur Brace's Anodic Coating Defects. Visit the nasf.org bookstore or contact one of the plating journal publishers that publish "Products Finishing" [link is to product info at Amazon] or Metal Finishing. The list is long and is very specific to the alloy you're using and the specific anodize process used (chromic vs. sulfuric vs. hardcoat).
Good luck ( anodically speaking! ).
Milt Stevenson, Jr.|
Syracuse, New York
Ed. note July '07: NASF.org no longer has this book. Anodic Coating Defects is available direct from the world distributor at www.interall.it/book.html.
September 6, 2013 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread
Q. Dear sir,
What are all the Types of Anodizing Defects, and How to solve or Rectify the Anodizing Defects. Examples:
1) White Rust,
2) White patch on Particular Area of the Component,
3) Dull Colour noticed on the component.
- Chennai,Tamil Nadu, India
^- Privately contact this inquirer -^
September 6, 2013
A. Hi Raman. If you can start with one of these 3 problems and supply us with specifics -- including alloy, processing sequence, photo of defect, frequency of the problem, etc., then I think we can work back and forth until we help you address the problem. But for a treatment of the general topic of anodizing defects, please see if your library has a copy of the referenced Arthur Brace book, or buy a copy from www.interall.it/book.html. That book is 168 pages and is probably the minimum length for a general discussion of anodizing defects. Good luck!
Ted Mooney, P.E. RET
Pine Beach, New Jersey