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Chemical conversion coating on top of anodizing

September 1, 2021

Q. Is orange colour will fade in the anodized parts with the thickness of 5 to 6 microns when immerse the anodized parts in Bonderite M CR 600 chemical for chemical conversion process for 30 to 40 seconds.

Vasudevan Sivaraman
- Madippakkam, Chennai, Tamil Nadu, India

September 2021

A. Hi cousin Vasudevan. Yes it may fade.

Indian English is different than American English, so I'm not sure I'm understanding the question. Further, we beg people to introduce themselves and explain the details of their own actual situation, not post abstract questions :-)

But it sounds to me like you have anodized components which are dyed orange in color, and presumably properly sealed, and now you want to dip them into a chemical conversion coating tank for some unknown reason.

We could guess that maybe you have components that require anodizing in some areas and chromate in other areas -- in which case you are not doing things in the right order :-(

But that's only a wild guess, so before we go off on wild goose chases, please introduce yourself (are you from the anodizing shop, or are you the buyer?) and your actual situation please. Thanks!

Luck & Regards,

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Ted Mooney, P.E. RET
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