Corrosion property about some kinds of stainless steel wire in outdoor atmosphere.

概要

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The atmospheric exposure test of various stainless steel wires has been carried out for ten years in three places, that is, a coastal area, a costal industrial zone and a suburb. As the results, the following facts were found. In general austenitic stainless steel wires, the rate of rusted area and pitting density were small, but the pitting occurred tended to advance deeply, therefore, care must be taken. In ferritic stainless steel wires, the overall corrosion progressed, therefore, the rust quantity was much, but the deep pitting was rather few. Even in the kinds of steel in which the rate of rusted area was large, the rate of cross section reduction was slight, therefore, the lowering of tensile strength was small.As to the effect of the places of exposure, in the coastal area where specimens were exposed to Cl-, the deterioration was most severe, the coastal industrial zone followed this, and in the suburb, it was mild.When stainless steel wires were exposed being brought in contact with other metal wires, in the case of the other metal being copper, the deep pitting advanced, and in zinc or aluminum, they tended to be protected.
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