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研究了Zn系合金阳极材料在不同环境介质中其电化学性能的变化,通过分析Zn系合金在3.5%NaCl溶液中的不同温度极化曲线,获得了环境温度对牺牲阳极材料性能影响的基本规律。结果表明,Zn-Al-Cd系合金在常温、50℃时,工作情况基本稳定,但当温度高于70℃时,Zn-Al-Cd电位比钢铁还高,钢铁腐蚀速率加快,即电位发生逆转,Zn-Al-Cd无法对钢铁再起到保护作用。
The change of electrochemical properties of Zn-based alloy anode materials in different environmental media was studied. By analyzing the polarization curves of Zn-based alloy in 3.5% NaCl solution, the basic rules of environmental temperature on the performance of sacrificial anode materials were obtained . The results show that the Zn-Al-Cd alloys are stable at 50 ℃ and 50 ℃, but when the temperature is higher than 70 ℃, the potential of Zn-Al-Cd alloys is higher than that of steel and the corrosion rate of steel increases Reverse, Zn-Al-Cd can not play a protective role of steel.