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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.2; Jul 7-11, 2003; Leganes, Madrid, Spain >Hydrogen Embrittlement and Electrochemical Corrosion Behaviors of Cu-IF and Microalloyed HSLA Steels
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Hydrogen Embrittlement and Electrochemical Corrosion Behaviors of Cu-IF and Microalloyed HSLA Steels

机译：Cu-IF和微合金HSLA钢的氢脆和电化学腐蚀行为

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摘要

Hydrogen embrittlement (HE) and electrochemical corrosion behaviors in the Cu-IF steel and the high strength low alloy (HSLA) steel were investigated for meeting the general demand that an advanced material with excellent material properties should be developed and applied to actual components and structures. Experimental results revealed that a critical nanometer size of copper precipitation particles beyond which a good protective passive film could not be maintained did not exceed 2-4 nm equivalent to the size of copper clusters precipitated in the peak aged stage. Furthermore, the grown copper particles, such as ε-copper, were preferable to the copper clusters and/or the twinned 9R structures as trapping site for hydrogen and contributed the suppression of HE. On the other hand, regarding the HSLA steel, it was apparent that the susceptibility to HE and the apparent diffusion coefficient of hydrogen in the steel, D_H, strongly depended on applied cathodic potential. There was a unique correlation between both, and the susceptibility to HE increased monotonously with increasing D_H. Consequently, the change in entrance rate of hydrogen into the steel with applied cathodic potential seemed to be responsible for the potential dependence of susceptibility to HE.
机译：为了满足开发具有优异材料性能的先进材料并将其应用于实际组件和结构的一般要求，研究了Cu-IF钢和高强度低合金（HSLA）钢中的氢脆（HE）和电化学腐蚀行为。实验结果表明，铜沉淀颗粒的临界纳米尺寸（超过该临界尺寸无法保持良好的保护性钝化膜）不超过在峰值时效阶段沉淀的铜簇尺寸的2-4 nm。此外，生长的铜颗粒，例如ε-铜，比铜簇和/或孪生9R结构更优选作为氢的俘获位点，并有助于抑制HE。另一方面，对于HSLA钢，很明显，对HE的敏感性和钢中氢的表观扩散系数D_H很大程度上取决于所施加的阴极电势。两者之间存在独特的相关性，并且随着D_H的增加，对HE的敏感性单调增加。因此，氢的进入速率随施加的阴极电势的变化似乎是造成对HE敏感性的电势依赖性的原因。

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