几种金属副在NaCl溶液中的抗蚀耐磨性能评价

CHARACTERISTICS OF ANTI-CORROSION/WEAR OF SEVERAL METALLIC PAIRS IN NaCl SOLUTION

应用电化学测试手段 ,针对 2 0、2Cr13、QAl 9-2、QAl 10 -3 -1 5和QAl 10 -4-4五种材料试件 ,分别测定了它们在NaCl溶液中的腐蚀电位及与QAl 9-2偶接时的电偶腐蚀电流的变化 .并对几种铝青铜材料和QAl 9-2构成的摩擦副进行了摩擦磨损性能分析 .结果表明 ,铝青铜材料的抗腐蚀性比钢好 .其中QAl 10 -4-4的腐蚀电位最为偏正 ,但它与QAl 9-2配副会对QAl 9-2产生较大的阳极电偶腐蚀 ;QAl 9-2与QAl 9-2相配时的电偶腐蚀最小 ,但其摩擦相溶性最差 ;而QAl 9-2与QAl 10 -3 -1

Corrosion potentials of steels 20,2Cr13,bronze alloys QAl 9-2,QAl 10-3-1.5 and QAl 10-4-4 in NaCl solution,and their corrosion currents during coupling with bronze alloy QAl 9-2 were measured by electrochemical methods.Then the friction and wear characteristics were analyzed for rubbing pairs made by QA19 with those bronze alloys seperatively.Test results reveal that the anti-corrosion properties of bronze alloys are better than that of steels.Although QAl 10-4-4 is the most electropositive material among the bronze alloys,it will result in a greater galvanic corrosion of anode QAl 9-2 when they coupled.The galvanic corrosion for QAl 9-2/ QAl 9-2 pair is the smallest,but its friction compatibility is the worst.Both the anti-galvanic-corrosion property and the friction compatibility are good for QAl 9-2/QAl 10-3-1.5 pair.