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topic 9948

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


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, Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey


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

drew nosti
Drew Nosti, CEF
Anodize USA - Ladson, South Carolina

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