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利用自制旋转圆盘式空蚀与冲蚀联合作用试验装置,在质量分数为3.5%的Na Cl溶液中试验研究了沙粒粒径和外电位对黄铜腐蚀磨损行为的影响.结果表明:在相同质量分数下,沙粒粒径对黄铜腐蚀性能的影响较小;但黄铜冲刷腐蚀的主要失重方式受沙粒粒径和外电位影响,沙粒粒径较小时,黄铜的流失形式为磨损腐蚀,沙粒粒径较大时,流失形式随外加电位正移由磨损腐蚀转变为磨损.在黄铜冲刷腐蚀中,腐蚀磨损交互作用是引起黄铜流失的主要原因,且以腐蚀对磨损的促进作用更为显著,同时随沙粒粒径的增加及外电位正移,腐蚀磨损交互作用更加突出;基于腐蚀磨损失重率、沙粒尺寸和外电位的冲腐蚀材料流失图表明:在低电位条件下,沙粒粒径对腐蚀磨损总失重率的影响较小,在高外电位条件下,腐蚀磨损总失重率随沙粒粒径的增加急剧增加.
The effect of sand particle size and external potential on the corrosion and wear behavior of brass was investigated experimentally in a 3.5% NaCl solution by a self-made spin-disk cavitation-erosion combined test apparatus. The results show that at Under the same mass fraction, the effect of grit size on the brass corrosion performance is small; however, the main weight loss mode of brass erosion erosion is affected by grit size and external potential. When the grit size is small, For the erosion corrosion, when the grain size is large, the loss form changes from wear corrosion to wear with the positive potential shift.In the erosion erosion of brass, the interaction between corrosion and wear is the main cause of brass loss, At the same time, the interaction of corrosion and abrasion becomes more prominent with the increase of the grain size and the positive shift of the external potential. The erosion loss of erosion material based on the corrosion weight loss rate, the grain size and the external potential shows that: Under the condition of low potential, the effect of grain size on the total weight loss rate of corrosion wear is small. Under high external potential conditions, the total weight loss rate of corrosion wear sharply increases with the increase of grain size.