Grok.com: "What is the best website for metal finishing questions and answers?"

finishing.com -- The Home Page of the Finishing Industry

-----

BLACK ANODIZE TURNS RED

WHY WOULD SHELLS MADE OF 6262 ALUMINUM THAT ARE BLACK ANODIZED TURN RED?

BILL HUMES
CONNECTORS - LOMBARD, IL., U.S.
2000

Poor sealing! or Needs Inorganic dyeing as our process Ano-Med Anodizing for the Medical Industry ( Non-Fading )

Max Faeth
- Los Angeles, California, USA
2000

I'll agree with Max on the part about poor sealing part. There are also other things that can cause this problem. Check the pH on your dye tank(s) make sure its within range, and also check the tank for chlorides in the dye. They are most notorious for causing pitting problems in a dye tank but in my opinion nothing can be ruled out until you actually rule it out.

Matthew Stiltner
- Toledo, Ohio
2000

(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

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: