MICROSCOPIC CHARACTERIZATION AND ELECTROCHEMICAL-BEHAVIOR OF HIGH-DOSE CARBON-IMPLANTED STAINLESS-STEELS

被引:6
作者
FUJIHANA, T
UEDA, Y
TAKAHASHI, K
IWAKI, M
机构
[1] SCI UNIV TOKYO,NODA,CHIBA 278,JAPAN
[2] RIKEN,WAKO,SAITAMA 35101,JAPAN
关键词
D O I
10.1016/0257-8972(94)90046-9
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A study was made of the electrochemical properties and microscopic characteristics of types 304 and 430 stainless steel implanted at room temperature with carbon at a dosed of 10(18) ions cm-2 at 100 keV. The electrochemical properties were measured by multisweep cyclic voltammetry in a solution of H2SO4 + Na2SO4. X-ray diffraction and X-ray photoelectron spectroscopy were used to analyze the structure, composition depth profiles and chemical bonding states of carbon-implanted layers. Carbon implantation suppressed the dissolution with transpassivation of stainless steels without influencing adversely their excellent passivity. The amorphized carbon-implanted layers were composed of graphitic solid state carbon, which had a gaussian depth profile corresponding to the distribution of implanted carbon, and metallic carbide with a uniform chemical state in the region containing more than approximately 20 at.% carbon. From these investigations, it is proposed that room-temperature carbon implantation at a very high dose can improve the aqueous corrosion resistance of stainless steels owing to the formation of amorphous layers consisting of graphitic solid state carbon and metallic carbide.
引用
收藏
页码:441 / 445
页数:5
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