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toys19
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Join Date: Jun 2009
Posts: 2

Powder Coating Wrought Aluminum

06/04/2009 8:36 AM

Hi,

We want to powder coat some wrought aluminum 6061 that has been HT to T6. The powder coating goes to 356 fahrenheit (180C) for about 1 hour, this is around about the ageing temp for 6061, will it effect the properties of the alloy?

Thanks in advance..
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Jerrell Conway
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Join Date: May 2006
Location: Bahama, NC. USA.
Posts: 270
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#1

Re: Powder Coating Wrought Aluminum

06/04/2009 2:08 PM

toys19 Im not sure about your 6061 but we had an aluminum spoiler for a race car powder coated and it became very soft and unusable. Jerrell

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Kwetz
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Spain - Member - New Member Engineering Fields - Nuclear Engineering - New Member

Join Date: Oct 2007
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#2

Re: Powder Coating Wrought Aluminum

06/05/2009 4:55 PM

Hi,

Normal aging temperatures for 6061 are between 320 and 350 F, depending on the product type (rolled, forged...). If the intended coating process needs holding 1 hour at 356F, the alloy will result over-aged.

Anyway, I recommend you to make a test just heating a test coupon (not necessarily coated) at 360 F for 1 hour and test it. Depending on the specific aging given to the raw material, the loss in mechanical properties can be acceptable for your intended use.

Kind regards

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