焼結ステンレス鋼の耐食性におよぼす開放気孔の影響とAlプレミックスの効果

概要

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The corrosion behavior of sintered 316L stainless steel was studied by sodium chloride solution spray test, and the influences of open pore and Al addition on the corrosion resistance were investigated.The results are summerized as follows.1) The percentage of rust area increases with the open porosity of sintered steel, and it is shown that the decrease of the open porosity reduces expansion of the rusting area.2) The rusting of sintered steel has upper limit on the diameter of the open pore. In this study, 0.05mmφ drilled wrought 316L, as pseudo-pore, corrodes after sodium chloride solution spray test for 96hr, but 0.10mmφ drilled wrought one doesnt corrode.3) The corrosion resistance of sintered 316L steel is improved by 1.5% Al addition.
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