高温高压环境下腐蚀试验溶液pH值的测量

摘要

In this paper, high temperature and high pressure pH electrode was used to measure the pH value of the solution during the test, and the change of pH value of the solution under different corrosion conditions was studied. The test results show that Cl- concentration increased to promote the occurrence of corrosion and solution pH increased, the rate of change has increased; CO2 partial pressure increased, the pH value decreased signiifcantly; Under the same corrosion condition, the corrosion of P110S was more serious than that of JFE13Cr, and the pH value of the test solution was higher than that of JFE13Cr.%本文主要采用高温高压pH电极测量了试验过程中溶液的pH值，同时研究了不同腐蚀条件下溶液pH值的变化情况。试验结果表明：Cl-浓度的升高促进了腐蚀的发生，溶液的pH升高，其变化速率有增大趋势；CO2分压的升高，溶液的pH值明显降低；在相同腐蚀条件下，P110S的腐蚀较JFE13Cr严重，试验溶液pH值的升高幅度相对于JFE13Cr较大。