乙二醇冷却液中AM60镁合金腐蚀行为研究

Study on Corrosion Behavior of AM60 Magnesium Alloys in Ethylene Glycol Coolant

通过电化学方法、失重实验和表面分析技术研究了乙二醇浓度、温度以及乙二醇氧化产物乙醇酸和乙二酸对AM60镁合金在乙二醇冷却液中腐蚀行为的影响,结果发现AM60镁合金在冷却液中的腐蚀速率随乙二醇浓度的增加而减小,同时乙二醇浓度也影响了AM60镁合金表面腐蚀产物的成分。随温度升高,AM60镁合金在冷却液中的腐蚀速率增大。乙二醇氧化产物对AM60镁合金在冷却液中腐蚀行为的影响的研究结果表明,乙醇酸加速了AM60镁合金在冷却液中的腐蚀;而低浓度的乙二酸对AM60镁合金在冷却液中的腐蚀具有抑制作用,但在更高浓度时,却使AM60镁合金的腐蚀速率增大。

The effects of ethylene glycol concentration, temperature, ethylene glycol oxidation products including glycolic acid and oxalic acid on the corrosion behavior of AM60 magnesium alloy in ethylene glycol coolant have been studied by electrochemical method, weight loss experiment and surface analysis technology.The results show that the corrosion rate of AM60 magnesium alloy in ethylene glycol coolant decreases with the increase of ethylene glycol concentration, and the composition of corrosion products on the surface of AM60magnesium alloy also varies under the influences of different concentrations of ethylene glycol. And the corrosion rate of AM60 magnesium alloy in ethylene glycol coolant increases with the rise of temperature. The research results of the effects of ethylene glycol oxidation products on the corrosion behavior of AM60 magnesium alloy in ethylene glycol coolant indicate that glycolic acid accelerates the corrosion of AM60 magnesium alloy in ethylene glycol coolant, while low concentration of acetic acid inhibites the corrosion of AM60 magnesium alloy in ethylene glycol coolant, but the corrosion rate of AM60 magnesium alloy increases at higher concentration.