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Clear Anodized 6061 -- Black Pitting in Bore

Q. Type II Clear Anodize 6061-T6 Aluminum corrosion pitting issue.

Has anyone out there had issues with internal bores with areas of corrosion pitting that appear black rather than a dull gray?

Lee Rensberger
Mfg Production Engineer - Blaine
September 11, 2025

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