Mechanical and electrochemical behavior of nanocrystalline surface of 304 stainless steel
Mechanical and electrochemical behavior of nanocrystalline surface of 304 stainless steel
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DOI：
10.1016/s0013-4686(02)00365-1
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发表时间：
2002-09
影响因子：
6.6
通讯作者：
Xiaolei Wang;Dongyang Li
中科院分区：
文献类型：
--
作者：
Xiaolei Wang;Dongyang Li
本文报道了用喷砂退火法制备304不锈钢（304SS）纳米晶表面层的研究进展。喷砂后表层的晶粒尺寸小于20 nm。采用纳米/微压痕、微划痕、扫描开尔文探针（SKP）、动电位扫描和电化学划痕等技术研究了纳米晶表面及其钝化膜的力学和电化学性能。结果表明，钝化膜增强后的纳米晶表面明显优于原始304SS。极化、电化学划痕和SKP测试表明，纳米晶表面具有较高的耐蚀性、再钝化能力和化学稳定性。结果表明，纳米晶化表面不仅提高了表层及其钝化膜的力学性能，而且有利于钢的钝化能力，提高了钢的耐蚀性。
This paper reports our recent studies on nanocrystalline surface layer of 304 stainless steel (304SS) produced using a sandblasting and annealing process. The grain size of the sandblasted surface layer was less than 20 nm. Mechanical and electrochemical properties of the nanocrystalline surface and its passive film were investigated using nano/micro/-indentation, micro-scratch, scanning Kelvin probe (SKP), potentiodynamic scanning and electrochemical scratch techniques. It was demonstrated that the nanocrystalline surface was markedly superior to that of original 304SS with enhanced passive film. The polarization, electrochemical scratch and SKP measurements indicated that the nanocrystalline surface had higher resistance to corrosion, greater capability of repassivation and higher chemistry stability. All results demonstrated that the nanocrystallization surface did not only enhance the mechanical properties of the surface layer and its passive film, but also benefited the passivation capability of the steel with improved corrosion resistance.