Letter 14053

Anodization [India]  

When anodizing some components made out of AZ5GU(AA 7075), black patches were observed. What may be the cause of it? How it can be remedied? Whether this black patches will lead to corrosion?

Venukuttan
Isro - Trivandrum, Kerala, India

Please exactly state the bath conditions??

Vikram Patel
- Gujarat, India

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