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Q&As since 1989


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Pollution reduction of "Alodine" like method and the use of Chromic acid

We have a process of treating aluminium that is referred to as "Alodine". In Ontario the need for a pollution reduction plan is required to be submitted, to the City of Toronto. They refer to this plan as P2. Our major concern is the use of Chromic acid in the process and it's disposal once it is contaminated. The above plan is looking for methods of reducing this heavy metal by reusing it. The equipment or method is the reason for my inquiry. Is there a commercially available process of re-using and what does it do and it's possible costs.

Thank you.

Luis M [last name deleted for privacy by Editor]
- Scarborough, Ontario, Canada
2001

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You and 10 thousand other shops. I'd bite the bullet and look into conversion coatings that are both good and hex-chrome free. I, for one, am a recent convert to the possibility that such a thing exists.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2001

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There is a substitute for Iridite/Alodine that has NO chrome in it. It is Sanchem 3000 series.

Drew Nosti, CEF
Anodize USA

Ladson, South Carolina

2001