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Automotive casting used in critical painting application. Part needed high corrosion resistance.

From Able Electropolishing Company, Inc.

These stainless parts are used in an automotive painting application.
End users reported to the manufacturer that they were experiencing
corrosion problems when using the parts with water based paints. The
manufacturer subjected the parts to corrosion tests and was able to verify
the problem. Engineers concluded that passivation alone did not prevent
corrosion, nor did it correct the problem after parts were in use.

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