模拟缝隙腐蚀环境中闭塞区内的临界pH值研究

Research on Critical pH Value of Blocked Area in Simulated Crevice Corrosion Environment

基于模拟闭塞电池的方法,研究了缝隙腐蚀环境中闭塞区内的临界p H值及其影响因素。结果表明:缝隙内p H值随极化时间的延长而下降,最终趋于稳定。在同一闭塞体系内,其临界p H值的大小受极化电流密度、温度和闭塞程度的影响不同。

Based on simulated blocked cell method, the critical pH value of blocked area in simulated crevice corrosion environment and its influencing factors were studied. The results indicate that pH value in the crevice declines with the increase of polarization time and eventually tends to be stable. However, the critical pH value influenced by the factors such as polarization current density, temperature and the degree of block is different.