Hi! John.
I believe that sanding is "bad news" with likelihood of inducing fatigue
cracks better degrease and aerosol spray IMHO. Pencil marks and the like
have been known to be an issue also?
Suggest those competants in this field will advice the forum ? Of course
scuff sanding is often called for on embedded components but I guess they
don't get the stresses of flexing in that position?
Regards
Bob Harrison G-PTAG
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of
TELEDYNMCS@aol.com
Subject: Re: Europa-List: Primer for Zn-coated steel
In a message dated 7/1/2003 9:29:03 AM Eastern Daylight Time,
cgalley@qcbc.org writes:
> If the tubes are steel, powder coating is o.k. Aluminum may not as the
> fusing temperature may alter the strength and temper of the aluminum. FAA
> will not approve aluminum to be powder coated for certified aircraft, so
you
> might do some checking before using this process.
Powder coating is also known for hiding cracks, especially in welded areas.
Before I found this out I had my nose gear mount and rudder pedals
powdercoated. I was happy with the finish until I started handling and
installing the
parts. The tubing was zinc coated to start with (shiney, gold finish) and
now the
powder coat is chipping off. I will likely scuff sand and repaint with
Corlar
primer, then a top coat.
Regards,
John Lawton
Dunlap, TN
A-245
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