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在70℃含1.2％HCl的卤水(以下简称酸化卤水)中对钛进行了添加缓蚀剂和阳极保护方法的研究。发现添加缓蚀剂B_1和B_4对气液相中的钛有明显缓蚀作用,使钛的腐蚀速度降低了100～1 000倍,腐蚀得到控制。B_1和B_4的推荐使用量分别为400ppm和200ppm。B_1和B_4的缓蚀机理是它们的加入增加了溶液的氧化能力,促进了阴极反应,使钛表面生成一层TiO_2钝化膜,钛变成了钝态。在+0.200V和+0.500V保护电位下对钛实施阳极保护,也可有效地控制钛的腐蚀,钛的腐蚀速度降低到0.015mm/a(年)。
The study on the addition of corrosion inhibitors and anodic protection to titanium was carried out in a brine containing 1.2% HCl at 70 ° C (hereinafter referred to as acidified brine). It was found that the addition of corrosion inhibitors B_1 and B_4 significantly inhibited the corrosion of titanium in the gas-liquid phase, which reduced the corrosion rate of titanium by 100-1000 times and controlled the corrosion. The recommended usage levels for B_1 and B_4 are 400ppm and 200ppm, respectively. The corrosion inhibition mechanism of B_1 and B_4 is that their additions increase the oxidation ability of the solution and promote the cathode reaction, resulting in the formation of a TiO_2 passivation film on the titanium surface, which leads to the passive state of titanium. Anodic protection of titanium at + 0.200V and + 0.500V protection potentials also effectively controls the corrosion of titanium, reducing the titanium corrosion rate to 0.015mm / year (year).