模拟城市酸雨条件下形成铜锈的稳定性研究

设计了可以重复获得铜锈的试验方法,把形成的铜锈从基体上剥离,填充到多孔微电极中,在模拟城市强酸雨条件下(0.2 gL-1Na2SO4+0.2 gL-1Na HCO3,pH值为3的酸性溶液中),测试了铜锈的电化学行为.在硼酸溶液中,通过循环伏安法测试表明,铜锈的电化学反应存在Cu(II)/Cu(I)和Cu(I)/Cu两个还原过程;对比试验发现,在腐蚀型测试介质中(模拟城市酸雨),阳极区可以观察到氧化现象,但是由于BiTA对铜锈的稳定作用,峰值电流明显降低.明确了BiTA对铜锈溶解的抑制效果.

The Study on the Stability of the Bronze in the Acid Rain Condition of a Simulated City

The thesis designs the new methods of obtaining aerugo repeatedly, which test the electrochemical behavior of the aerugo in the strong acid rain condition of a simulated city(0.2 gL~(-1)Na_2SO_4 0.2 gL~(-1)NaHCO_3, in the acid solution of pH value is 3) through stripping the aerugo from the copper and then packing it in the porous microelectrode. In the boric acid solution, the circulation test of volt-ampere shows that there exist the two Cu(II)/Cu(I) and Cu(I)/Cu reduction processes in the electrochemical reaction; the compared experiments find that in the corroding type of testing medium (acid rain of a simulated city), the oxygenation can be observed in the anodic area, but because the BiTA stabilize the copper, the peak value of the electric current is obviously reduced. Further defines the inhibitory effect of BiTA to copper dissolution.