Mary,

Mixed Flowing Gas tests have very little to do with reality. They are used to determine
the ability of various materials to resist certain reactive gases.

They are not designed to simulate expected conditions. They are stimulation type tests.
Correlating the results to real world conditions can be very problematic.

Telcordia (Bellcore) Spec GR-63-CORE has some interesting measured amounts of contaminants
for both indoors and outdoors. When you compare these numbers with MFG tests the divergence
is very apparent.

The real question is do you need to know what the long term effects
of exposures are or do you need to meet a contract requirement?

David A. Douthit
Manager
LoCan LLC

Mary Lin wrote:

> Does anyone has experience with aging test of metal plating such as chrome,
> aluminum on plastic chassis in a light industry environment? What I can think
> of is the mixed flowing gas test, anything else I should  be aware of?
>
> Thanks for your time.
>
> Mary
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