Re: Alumina coating

Posted by Gordon England on February 12, 2003 at 18:48:02:

In Reply to: Alumina coating posted by David Coultas on February 10, 2003 at 10:50:37:

: Hi,

: I am interested in coating stainless steel exhaust pipes with a porous, thermally resistant layer of aluminium oxide. Can anyone recommend a technique? I have tried wet spraying a slurry of Al2O3 in water, but the adhesion was not good.

: Cheers,

: Dave

Hi Dave

You could try combustion powder spraying first a bond coat of nickel/aluminium followed by alumina
(without the use of cross airjet acceleration. Inquire at a local thermal spray coating company (It's not something you would set up for yourself unless you are going into production.

If this seems to complex or expensive for your purpose I believe there are paint on products available, but they usually require heat curing.

Regards Gordon

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