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研究了纯Zn在模拟大气腐蚀环境(饱和Zn(OH)_2溶液)中的初期电化学腐蚀机理。利用失重实验,极化曲线和电化学阻抗技术测试溶解氧浓度和温度对纯Zn在饱和Zn(OH)_2溶液中电化学腐蚀行为的影响,采用SEM分析腐蚀产物形貌。结果表明:温度是影响纯Zn在饱和Zn(OH)_2溶液中腐蚀速控的主要因素,纯Zn在饱和Zn(OH)_2溶液中的腐蚀速率随着溶解氧浓度的降低而减小,随着溶液温度的升高而增大。
The electrochemical mechanism of pure Zn in simulated atmospheric corrosion (saturated Zn (OH) 2 solution) was studied. The effects of dissolved oxygen concentration and temperature on the electrochemical corrosion behavior of pure Zn in saturated Zn (OH) _2 solution were investigated by weight loss test, polarization curve and electrochemical impedance spectroscopy. The morphology of corrosion products was analyzed by SEM. The results show that temperature is the main factor affecting the rate of corrosion of pure Zn in saturated Zn (OH) 2 solution. The corrosion rate of pure Zn in saturated Zn (OH) 2 solution decreases with the decrease of dissolved oxygen concentration. Increasing the temperature of the solution increases.