论文部分内容阅读
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。
Using scanning vibration electrode technology and local electrochemical impedance spectroscopy (EIS) technique, the influence factors of X100 pipeline steel stress and hydrogen element on electrochemical corrosion behavior in near-neutral pH solution were studied. The results show that hydrogen charging can effectively improve the anodic dissolution of the steel and contribute to a layer of corrosion products. Since the hydrogen atoms rapidly diffuse in the sample over time, the charge transfer resistance hardly changes in the region and outside the region . When the local stress concentration is not close enough to reach the yield strength of steel, the steel is still in a relatively stable state, and the dissolution rate of the entire surface of the sample is not uniform.