【摘要】 对国外引进的高温高压参比电极不稳定性的原因进行了分析,并相应地作了改进:优化氯化工艺;改善密封结构;采用饱和KCl电解液,从而制得了性能良好的Ag/AgCl高温高压参比电极,建立了完善的高温高压电化学测试体系,解决了长期困扰模拟油气井高温高压环境中腐蚀电化学研究的难题。对比了原位法和离位法高温高压电化学测试的结果,证实将离位法测试结果用于分析高温高压油气井环境中油管钢的电化学腐蚀行为和机理是不合适的。更多还原

【Abstract】 High performance Ag/AgCl reference electrode had been made for in situ investigation of electrochemical corrosion under the conditions of high temperature and high pressure (HPHT) by optimizing of chlorinating process, improving of sealing structure and adopting of saturated KCl solution to overcome the instability of imported HPHT reference electrode. Thus the electrochemical system of autoclave is perfect to achieve the corrosion measurement in simulating oilfield downhole environments of HPHT. Comparing of the electrochemical results in situ and simulation of HPHT environments, it is confirmed that simulation test is unsuitable for discussion of corrosion behaviors and mechanisms of tube steel in HPHT oil and gas well.更多还原