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Cracking aluminum and powder coating

When we try to powder coat an aluminum cylinders, approximately 4" in diameter, they crack during the process. Any ideas why?

Stephen Murphy
Manufacturing - Houston, Texas
2004

Need a bit more info. At what stage of the process do they crack? What pretreatment are you using? What cure temp? time? Whats the cylinder? thick wall, thin?

Geoff Crowley
Crithwood Ltd.
Westfield, Scotland, UK

2004

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