| 赵国凯,韩永琪,李高阳,李梦丽,刘兴俞,赵会玲,王小永.化学通报,2020,83(6):564-568. |
| 玉米醇溶蛋白/十二烷基硫酸钠复合物对碳钢的缓蚀效应 |
| Corrosion Inhibition Effect of Zein/SDS Complex on Carbon Steel |
| 投稿时间：2020-01-15 修订日期：2020-02-10 |
| DOI： |
| 中文关键词: 金属腐蚀 玉米醇溶蛋白 表面活性剂 失重法 极化曲线 |
| 英文关键词:Metal corrosion Zein Surfactant Weight loss method Polarization curve |
| 基金项目:国家自然科学基金项目（21573071）资助 |
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| 中文摘要: |
| 通过失重法、扫描电镜和极化曲线法研究了玉米醇溶蛋白/十二烷基硫酸钠（zein/SDS）复合物对碳钢的缓蚀效应。在1mol/L盐酸溶液中，加入0.05‰ zein对碳钢的缓蚀率为65.5%，而加入zein/SDS复合物（0.05‰ zein+0~8mmol/L SDS）能够使碳钢的缓蚀率逐渐增高至90.1%。随着zein/SDS复合物中SDS浓度的增大，碳钢表面逐渐由深坑面腐蚀变为局部点腐蚀，最终趋于平整。极化曲线测试表明，zein/SDS复合物能够有效抑制碳钢表面电极反应的发生。纯zein与碳钢表面吸附的ΔGads值表明，zein在碳钢表面主要发生静电吸附作用，而zein/SDS复合物对碳钢的缓蚀效应主要来源于zein同碳钢表面之间的配位吸附作用，这是由于SDS类胶束之间的静电斥力引起zein空间构象的改变。 |
| 英文摘要: |
| The corrosion inhibition effect of zein/SDS complex on carbon steel was studied by weight loss method, scanning electron microscope and polarization curve method. In 1mol/L hydrochloric acid solution, the corrosion inhibition rate of carbon steel by adding 0.05 ‰ zein is 65.5%, and the addition of zein/SDS complex (0.05‰ zein+0~8mmol/L SDS) can gradually increase the corrosion inhibition rate of carbon steel to 90.1%. With the increase of SDS concentration in the zein/SDS complex, the surface of the carbon steel gradually changed from overall deep pit corrosion to local pitting corrosion, and eventually flattened. The polarization curve test showed that the zein/SDS complex can effectively inhibit the occurrence of electrode reactions on the surface of carbon steel. The ΔGads value of the surface adsorption of pure zein with carbon steel indicated that electrostatic adsorption is the main force between zein and the surface of carbon steel, and the corrosion inhibition effect of zein/SDS complex on carbon steel mainly comes from the coordination adsorption between zein and carbon steel, which is related with the conformation change of zein induced by the electrostatic repulsion between SDS micelle-like aggregates. |
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