碱性电解液中缓蚀剂对铝电极性能的影响

通过析氢实验、极化曲线测试、放电性能测试,研究了在6 mol/L NaOH电解液中添加不同浓度Na2SnO3和由Na2SnO3、十六烷基三甲基溴化铵(CTAB)组成的复合缓蚀剂对铝合金电极析氢速率和电化学性能的影响.实验结果表明:缓蚀剂的加入能不同程度抑制铝合金电极的析氢腐蚀,提高阳极利用率,改善铝阳极的电化学性能,一定浓度配比的复合缓蚀剂的效果要比单一缓蚀剂效果明显.在添加有0.025 mol/L Na2SnO3和10 mg/L十六烷基三甲基溴化铵(CTAB)的复合缓蚀剂电解液中,铝电极的析氢腐蚀受到明显抑制,缓蚀效率达93.4％,同时表现出较好的电化学性能.

Influence of inhibitors on the performance of aluminum electrode in alkaline electrolyte

The influences of adding different concentration of Na2SnO3 and the composite inhibitor consisting of Na2SnO3 and hexadecyl trimethyl ammonium bromide over the rate of hydrogen evolution and the electrochemical properties of aluminum alloy anode were investigated in 6 mol/L NaOH electrolyte.This was carried out by means of hydrogen collection,polarization curve and galvanostatic discharge.The experimental results indicated that the addition of corrosion inhibitor could effectively inhibit the hydrogen evolution corrosion of aluminum alloy electrode,improve the anode utilization ratio and optimize the electrochemical properties of the aluminum anode.Also,the composite corrosion inhibitor performed better than the single one.The best composition of the corrosion inhibitor in the electrolyte was 0.025 mol/L Na2SnO3 and 10 mg/L CTAB.Under this condition,the hydrogen evolution corrosion of aluminum electrode was effectively inhibited with the inhibition efficiency of 93.4%,and better electrochemical properties were found at the same time.