Abstract
The corrosion properties of a series of eight stainless steel alloys were determined in a "Dip-and-Dry Corrosion Test". This cyclic type of test has been frequently used to test stainless steel alloys for automobile trim and it has shown some correlation with actual field test results. Each alloy series tested was made from a basic AISI Type 430 ferritic stainless steel but modified by a number of small additions of one of the following elements: Mo, V, W, Ta, Si, Re, Pd, or Ge. The final composition never exceeded 3.11% of addition element. The corrosion resistance of AISI Type 430 stainless steel containing 1.5% and 3.1% Mo showed a marked superiority, both in appearance and in weight loss, compared to the base alloy. An alloy containing 1.8% Re also has superior corrosion resistance in this test. Small additions of tantalum, silicon or germanium, to AISI Type 430, all improved corrosion resistance with increased alloy content. Tungsten produced a slight improvement in corrosion resistance and appearance. Vanadium or palladium additions did not improve these corrosion properties of their alloys, and showed no consistent trend with increasing alloy addition.
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