等离子体改性１Ｃｒ１８Ｎｉ９Ｔｉ不锈钢钝化膜的耐蚀性雷明凯，袁力江，孔常静，张仲麟（大连理工大学大连１１６０２４）电子回族共振（ＥＣＲ）微波等离子体具有高电子密度和离化率，低放电粒子溅射率及无极放电设计等优点［１－２］，为金属钝化膜的改性提供了有效和便利的手段。本文报导利用ＥＣＲ微波氮等离子体轰击１Ｃｒ１８Ｎｉ９Ｔｉ不锈钢钝化膜进行表面改性的技术和结果。其耐蚀性采用动电位阳极极化曲线评定；钝?...
A new surface modiffication technique by direct exposure of the native passive film on 1Cr18Ni9Ti stainless steel to electron cyclotron resonance (ECR) nitrogen plasma at room temperature was described.The modification significantly reduced its susceptibility to pitting corrosion. The pitting corrosion resistance of the modified steel in 1%NaCl solution was comparable to that of AISI type 316L stainless steel.In general, a higher self-biasing potential and a longer modification time resulted in further improvement of the corrosion resistance.The X-ray photoelectron spectroscopy (XPS) analyses showed that the modified passivating surface predominantly consisted of the stable Cr2O3,FeOx oxides, and other chromium oxides such as CrO3 and CrO2, as well as some of carboxyl species with a little chromium nitride. These chromium oxides were enriched in the modified passive films and could act as a stable corrosion resistant barrier layer.
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