利用腐蚀失重试验, 电化学试验和扫描电子显微镜等方法研究了不同温度下P110钢在含饱和H2S/CO2气体的5% NaCl溶液中的腐蚀行为。研究表明: 随着温度的升高, P110钢的腐蚀速率呈现出了先增大后减小的规律; 在含饱和H2S/CO2气体的5％ NaCl溶液中, 由于温度升高促进了点蚀的发生, 在较高温度时形成全面腐蚀, 但温度的升高导致H2S、CO2气体的溶解度降低, 抑制了点蚀的发生, 形成厚而致密的腐蚀产物膜, 使腐蚀速率随温度升高而降低。

The corrosion behavior of P110 steel in 5%NaCl solution with saturated H2S and CO2 gases was investigated at different temperatures by corrosion weight loss testing, electrochemical testing and scanning electron microscopy. The results show that the corrosion rate of P110 steel at different temperatures increased first and then decreased with the increase of temperature. In 5% NaCl solution with saturated H2S and CO2 gases, the increase of temperature would promote the pitting corrosion of P110 steel, which led to general corrosion at higher temperatures. But the solubility of H2S and CO2 decreased with increasing temperature, which restrained pitting corrosion and led to the formation of thick and compact corrosion films, so the corrosion rate decreased.