摘要
利用硝酸滴定试验、失重试验、动电位极化方法以及电化学阻抗谱技术,研究了Cu-Zn-Ni铜合金稀土镧盐型缓蚀剂,在3.5%NaCl溶液中的缓蚀作用。结果表明,协同型缓蚀剂BTA(苯并三氮唑)+TTA(甲基苯并三氮唑)和BTA+LaCl3能够很好地提高该铜合金在3.5%NaCl溶液中的耐腐蚀性能。当缓蚀剂中同时含有BTA、TTA、LaCl3(BTA:3g.L-1,TTA:14g.L-1,LaCl3:7g.L-1)时所表现出来的缓蚀效率最高。Cu-Zn-Ni合金经BTA+TTA+LaCl3缓蚀剂处理后,在NaCl溶液中室温下的腐蚀速率为2μm/a。
The lanthanum chloride-containing corrosion inhibitors for copper-zinc-nickel alloy were investigated by using corrosion resistance rapid test, weight loss experiment, potentiodynamic polarization measurement, and electrochemical impedance spectroscopy（EIS） study. The results indicate that the synergistic inhibitors of BTA-- TTA or BTA -- LaCl3 provide very good protective efficiencies for the copper alloy in 3. 5 % NaC1 solution. The mixture of BTA, TTA and lanthanum chloride （BTA：3 g · L -1, TTA：14 g · L-1, and LaCl3：7 g· L- 1 ） provided the highest protective efficiency. The corrosion rate of the Cu-Zn-Ni alloy with the BTA ＋ TTA ＋ LaCl3 inhibitor treatment in 3.5 % NaC1 solution at room temperature was evaluated to be 2/μm/year.
出处
《腐蚀与防护》
CAS
北大核心
2013年第1期36-41,共6页
Corrosion & Protection
