十二烷基二羟乙基氧化胺在0.5 mol·L-1 H2SO4中对A3钢的缓蚀性能
Corrosion Inhibition of A3 Steel by Lauryl Dihydroxyethyl Amine Oxide in 0.5 mol·L-1 H2SO4 Solution
摘 要
通过失重法、电化学方法和量子化学计算法研究了十二烷基二羟乙基氧化胺(OAE-12)在0.5 mol·L-1 H2SO4中对A3钢的缓蚀性能和作用机理。结果表明,在0.5 mol·L-1 H2SO4中OAE-12能同时抑制A3钢的阴、阳极反应，缓蚀性能显著，当OAE-12质量浓度仅为200 mg·L-1时，失重试验所得缓蚀率可达93.59%，且失重法、动电位极化曲线法、电化学阻抗谱法测试结果具有一致性;通过量子化学计算结果可知，OAE-12缓蚀作用机理可能是源于其分子内的氮、氧与钢表面的铁的相互作用。
硫酸
A3钢
缓蚀性
OAE-12
sulfuric acid
A3 steel
corrosion inhibition
Abstract
The corrosion inhibition and its mechanism of lauryl dihydroxyethyl amine oxide (OAE-12) as a corrosion inhibitor were studied for A3 steel in 0.5 mol·L-1 H2SO4 solution in weight loss experiment, electrochemical method and quantum chemical calculations. Results showed that the OAE-12 had significant corrosion inhibition, which could inhibit the anodic and cathodic reactions at the same time in 0.5 mol·L-1 H2SO4 solution. The anti-corrosion efficiency in the weight loss experiment reached 93.59% in 0.5 mol·L-1 H2SO4 solution when the concentration of OAE-12 was 200 mg·L-1. The potentiodynamic polarization curves and EIS of A3 steel in H2SO4 solution containing the OAE-12 revealed that both cathodic and anodic processes of steel corrosion were restrained. Quantum chemical calculations showed that OAE-12 molecules might interact with the surface of mild steel through the nitrigen and oxygen atoms donating electrons.
中图分类号 TG174.42 DOI 10.11973/fsyfh-201601007
所属栏目 试验研究
基金项目 材料腐蚀与防护四川省重点实验室开放基金资助项目(2011CL13)
收稿日期 2014/11/20
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备注崔益顺(1969-),教授,硕士,从事无机精细化工方面研究,
引用该论文: XIANG Yun-gang,CUI Yi-shun,QIAO Kang-quan. Corrosion Inhibition of A3 Steel by Lauryl Dihydroxyethyl Amine Oxide in 0.5 mol·L-1 H2SO4 Solution[J]. Corrosion & Protection, 2016, 37(1): 30
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