十二烷基二羟乙基氧化胺在0.5mol·L^-1H2SO4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) H_2SO_4 Solution

作　　者：向云刚 崔益顺[1] 谯康全[2,3] 

机构地区：[1]四川理工学院材料与化学工程学院,自贡643000 [2]四川理工学院分析测试中心,自贡643000 [3]材料腐蚀与防护四川省重点实验室,自贡643000

出　　处：《腐蚀与防护》2016年第1期30-34,38,共6页Corrosion & Protection

基　　金：材料腐蚀与防护四川省重点实验室开放基金资助项目(2011CL13)

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0.5mol·L^(-1)H_2SO_4中对A3钢的缓蚀性能和作用机理。结果表明,在0.5mol·L^(-1)H_2SO_4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200mg·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。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.

关 键 词：OAE-12 硫酸 A3钢 缓蚀性 

分 类 号：TG174.42[金属学及工艺—金属表面处理]