Xue H, Xu N, Zhang C
Shanghai Institute of Metallurgy, Chinese Academy of Sciences, People's Republic of China.
Adv Contracept. 1998 Jun;14(2):153-60. doi: 10.1023/a:1006594818470.
Some copper-bearing intrauterine devices (Cu-IUDs) consist of pure copper and stainless steel. Corrosion of copper in the Cu-IUD was anticipated to be affected by galvanic action due to electrical contact between these two metals. Electrochemical measurements were carried out in physiological saline with or without indomethacin, which was introduced for bleeding control. In the copper/stainless steel couple, the open-circuit potential of stainless steel was found to play a decisive role. In most cases, when stainless steel was in the passive state and acted as the cathode, the contact accelerated copper corrosion. In addition, the area ratio of stainless steel to copper altered copper corrosion behavior. The larger the area of stainless steel, the greater the acceleration of copper corrosion. It was noted that the stainless steel surface might be activated due to improper handling of the IUD. In this case, copper became the cathode of the couple and its corrosion was suppressed.
一些含铜宫内节育器（Cu-IUD）由纯铜和不锈钢组成。由于这两种金属之间的电接触，预计Cu-IUD中铜的腐蚀会受到电偶作用的影响。在有或没有引入用于控制出血的吲哚美辛的生理盐水中进行了电化学测量。在铜/不锈钢偶中，发现不锈钢的开路电位起决定性作用。在大多数情况下，当不锈钢处于钝态并作为阴极时，接触会加速铜的腐蚀。此外，不锈钢与铜的面积比改变了铜的腐蚀行为。不锈钢的面积越大，铜腐蚀的加速程度就越大。需要注意的是，由于对宫内节育器处理不当，不锈钢表面可能会被活化。在这种情况下，铜成为偶对的阴极，其腐蚀受到抑制。
