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When bare ferrous and non-ferrous parts are exposed
to our environment, corrosion begins to occur. The service
life of these parts is shortened dramatically, due to
this naturally occurring, corrosion process.
In order to extend the service life of the ferrous
or non-ferrous parts, we subject those parts to metal
finishing processes. These processes can be as simple
as applying topcoats to act as a barriers to the environment
, or as complicated as multi-layer, electroplated deposits.
Manufacturers need to know how long their components
will last in various environments before they fail.
Accelerated methods of corrosion testing are needed
to determine which finish works best for their application.
Environmental test chambers meet those needs.
There are numerous test methods being used throughout
the world today. Please see table 1 for a few examples.
New specifications are being written daily and each
industry has different requirements. Cyclic testing
is now being done which cycles between salt spray, humidity,
and heat, to better assimilate environmental conditions.
The selection of a environmental chamber can begin
once a particular test method, and failure conditions
have been determined. Test chambers vary in size from
table top to “drive-in” units.
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