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研究AM60镁合金在3种(A、B、C)市售汽车发动机冷却液中的腐蚀电化学行为.极化曲线、电化学阻抗谱测试表明,冷却液A对AM60镁合金的腐蚀性最强,B腐蚀性略低于A,C腐蚀性最弱,最适于镁合金汽车发动机使用.冷却液对发动机镁合金材料的腐蚀性与其电阻有关系,电阻越大,腐蚀性越小;冷却液中的乙二醇和添加剂组分在镁合金表面的竞争吸附对镁合金的腐蚀行为也有重要影响.
The electrochemical corrosion behavior of AM60 magnesium alloy in three kinds of (A, B, C) commercial automobile engine coolant was investigated.The results of polarization curves and electrochemical impedance spectroscopy showed that the corrosion of AM60 magnesium alloy by coolant A was the strongest , B corrosive slightly lower than A, C corrosive weakest, the most suitable for magnesium alloy car engine use. Coolant on the engine magnesium alloy corrosion resistance and its resistance, the greater the resistance, the less corrosive; coolant The competitive adsorption of ethylene glycol and additive components on the surface of magnesium alloy also plays an important role in the corrosion behavior of magnesium alloys.