AAMA vs AAC

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Posted by Alyosha Verzhbinsky (12.49.219.230) on March 19, 2009 at 18:21:12:

I'm an architect.

For an exterior application in salty environment, I specified 3/4" thick, 8' wide 6061 T6 aluminum plates with Class 1 Natural Anodized Finish (AAMA 611 AA-M12C22A41 Clear anodic coating not less than 0.7 mils thick).

Contractor submitted a sample of grained (120 grit) plate in Type III hard anodized coating. its dark gray looking, quite unusual for those of us that are used to seeing standard clear anodizing. I love it, personally.

My question is: can anyone tell me if performance of AAC Type III in the exterior coastline salty environment in San Francisco will be equivalent to the specified Class 1 A41 finish? Is color retention good? Is color consistency good from piece to piece?

Thanks.

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: I'm an architect. : For an exterior application in salty environment, I specified 3/4" thick, 8' wide 6061 T6 aluminum plates with Class 1 Natural Anodized Finish (AAMA 611 AA-M12C22A41 Clear anodic coating not less than 0.7 mils thick). : Contractor submitted a sample of grained (120 grit) plate in Type III hard anodized coating. its dark gray looking, quite unusual for those of us that are used to seeing standard clear anodizing. I love it, personally. : My question is: can anyone tell me if performance of AAC Type III in the exterior coastline salty environment in San Francisco will be equivalent to the specified Class 1 A41 finish? Is color retention good? Is color consistency good from piece to piece? : Thanks.

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