CAJ | 학술논문

运用扫描振动电极技术和局部电化学阻抗谱测量技术，对近中性pH值溶液中X100管线钢应力和氢元素对电化学腐蚀行为的影响因素进行了研究。结果表明，充氢能有效提高钢的阳极溶解，有助于产生一层腐蚀产物，由于氢原子在试样中随时间会发生快速的扩散，所以电荷转移电阻在区域内和区域外基本没什么变化。当局部应力集中不足以接近或达到钢的屈服强度时，钢依然处在相对稳定的状态，并且试样的整个表面的溶解速率不均匀。
운용소묘진동전겁기술화국부전화학조항보측량기술，대근중성pH치용액중X100관선강응력화경원소대전화학부식행위적영향인소진행료연구。결과표명，충경능유효제고강적양겁용해，유조우산생일층부식산물，유우경원자재시양중수시간회발생쾌속적확산，소이전하전이전조재구역내화구역외기본몰십요변화。당국부응력집중불족이접근혹체도강적굴복강도시，강의연처재상대은정적상태，병차시양적정개표면적용해속솔불균균。
In this work, scanning vibrating electrode technique and local electrochemical impedance spectroscopy measurements were used to investigate the effects of stress and hydrogen on electrochemical corrosion behavior of a X100 pipeline steel in a near-neutral pH solution. Results demonstrated that the hydrogen-charging enhances the local anodic dissolution of the steel, contributing to the formation of a layer of corrosion product. However, there is little difference of the charge-transfer resistance between the regions with and without hydrogen-charging due to rapid diffusion of hydrogen atoms throughout the specimen with time. When the local stress concentration is not significant enough to approach the yielding strength of the steel, the steel is still in a relatively stable state, and there is a uniform distribution of dissolution rate over the whole surface of the steel specimen.