采用失重法和电化学方法研究了P110S油套管钢在不同pH 氯化钠溶液中的腐蚀磨损行为,分析了试样表面的磨损产物。结果表明：试验钢在pH 为3的氯化钠溶液中的腐蚀磨损速率最大,而在 pH 为7氯化钠溶液中的最小,在不同 pH 氯化钠溶液中,试验钢的腐蚀与磨损呈正交互作用；腐蚀磨损后试样的自腐蚀电位在 pH 为11的氯化钠溶液中最低,在 pH 为3,7的氯化钠溶液中相差不大,溶液pH 对腐蚀磨损前试样的自腐蚀电位影响不大；随着氯化钠溶液 pH 的增加,试样表面磨损变形程度增大,腐蚀产物中氧、铁原子比减小。
The corrosion wear behavior of oil well tube steel P110S in NaCl solutions at different pH was investigated by the mass-loss and electrochemical tests.The wear products on the sample surface were also analyzed. The results show that the corrosion wear rate of the tested steel in NaCl solution at pH3 was the highest while the lowest in NaCl solution at pH7.In NaCl solutions at different pH,the synergy between corrosion and wear of the tested steel was positive.The free corrosion potential of the sample after corrosion wear was the lowest in NaCl solution at pH11 and had little difference in NaCl solution at pH3 and pH7.The solution pH value had little influence on the free corrosion potential of the sample before corrosion wear.With the increase of NaCl solution pH value,the wearing deformation at the sample surface increased,and the atom ratio of O/Fe of the corrosion product decreased.
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