There is a recognised abrasion resistance test called Taber. This uses wheels with
specified grit and rotation speeds pressures etc, and is designed to give repeatable
comparitive data. This maybe what you are looking for. Believe its an ASTM Standard so try
there for more details, [if no joy I can punt around my files for more info.]

Mike Fenner
Bonding Services & Products
T: +44 1295 722992
F: +44 1295 720937

----- Original Message -----
From: Bill Davis <[log in to unmask]>
To: <[log in to unmask]>
Sent: 28 October 1999 23:18
Subject: Re: [TN] sand-man


> Ralph- Try finding something call "Arizona Road Dust". This is an industry
> standard "Dirt" that is predominantly silicon diox, but also has other
> constituents. It is generally used by the DOT and automotive industries for
> testing metal contacts as well as paint durabilities. Can't help beyond
> that...
> >  Bill Davis, Ph.D
> >       MS&PF
>   408-273-2921
> [log in to unmask]
>
>
>
> -----Original Message-----
> From: Vaughan, Ralph H [mailto:[log in to unmask]]
> Sent: Thursday, October 28, 1999 8:33 AM
> To: [log in to unmask]
> Subject: [TN] sand-man
>
>
> For anyone who would like a diversion from the assembly processes, I have a
> different question.
>
> My Army customer is simulating field testing of a weapon system to check the
> abrasion resistance of some treated metal surfaces (tungsten carbide) that
> rub together during flight.  The 'sand' that they are using to contaminate
> these areas is aluminum oxide.  Needless to say, excessive scoring is
> observed on the metal faces.  My contention is that sand is primarily
> quartz, or silicon dioxide, which is softer than the Al2O3, and the system
> is being over-tested.
>
> Anyone have a notion of the acceptable sand type used in environmental
> tests?
>
> Thanks
>
> Ralph Vaughan
> Boeing-Fleming

Mike Fenner
Bonding Services & Products
T: +44 1295 722992
F: +44 1295 720937

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