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Fatigue concern with hardcoating 6061 twice.

April 20, 2010

We had a manlift platform (6061) hardcoated (type III) with disasterous results. The process was not performed correctly, resulting in burn areas, non-uniform appearance, etc. Is it possible to re-hardcoat the platform with minimal concern of decreased metal fatigue? If another hardcoat application is not recommended, can we clean it up (remove current hardcoat and powder coat or paint?

54835-1 54835-2

Don Bartelson
Engineer - Cape Canaveral, Florida

Theoretically, there is no reason you cannot strip and re-anodize in a quality anodizing shop that has a large enough tank, enough voltage, enough amperage for at least 24 ASF, enough chilling for 32 to 45 F, a glycolic/glycerin additive, and UNIFORM agitation. The part looks very large so we suspect it cramped the tank and limited agitation, did not have enough voltage for the thickness you desired, etc...This is not a commercial site, but come back with more info.

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

April 20, 2010

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