模拟海水淡化一级反渗透产水中咪唑啉复配缓蚀剂对碳钢的缓蚀效果
Corrosion Inhibition of a Mixture Containing Imidazoline to Carbon Steel in Simulated Outlet Water from Seawater Reverse Osmosis Desalination
摘 要
通过电化学测试、原子力显微镜（AFM）、X射线光电子能谱法（XPS）和X射线衍射法（XRD）研究了2-十一烷基-N-羧甲基-N-羟乙基咪唑啉（UHCI）与硫酸锌（ZnSO4）复配对20钢在模拟海水淡化一级反渗透产水中的缓蚀效果。结果表明：复配缓蚀剂是一种混合型缓蚀剂，能有效抑制20钢的腐蚀，复配缓蚀剂的添加总量为100 mg/L时，最佳配比为50 mg/L HUCI+50 mg/L ZnSO4，此时缓蚀率达到96.99%；UHCI分子吸附在金属阳极区，抑制了阳极反应，ZnSO4以Zn（OH）2的形式沉积在金属阴极区，抑制了阴极反应。
咪唑啉
复配
海水淡化一级反渗透产水
carbon steel
imidazoline
combination
outlet water from seawater reverse osmosis desalination
Abstract
Corrosion inhibition of 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazoline (UHCI) in combination with ZnSO4 to 20 steel in simulated outlet water from seawater reverse osmosis desalination was investigated by electrochemical testing, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). Results show that the combined inhibitor, as a mixed type inhibitor, could inhibit the corrosion of 20 steel effectively. The best proportion was 50 mg/L HUCI+50 mg/L ZnSO4 at a total concentration of 100 mg/L, and the inhibition efficiency reached to 96.99% under this condition. UHCI molecules adsorb on the surface of metal anode, and inhibit anodic reaction. Meanwhile, ZnSO4 is deposited on the surface of metal cathode in the form of Zn(OH)2, and inhibits cathodic reaction.
中图分类号 TG174 DOI 10.11973/fsyfh-201710010
所属栏目 绿色缓蚀剂
基金项目 上海市科委项目（14DZ2261000）
收稿日期 2016/1/20
修改稿日期
网络出版日期
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引用该论文: LIU Songhui,WANG Yuna,YUAN Binxia,DONG Wantian,LIAO Qiangqiang. Corrosion Inhibition of a Mixture Containing Imidazoline to Carbon Steel in Simulated Outlet Water from Seawater Reverse Osmosis Desalination[J]. Corrosion & Protection, 2017, 38(10): 789
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【5】李敬,刘贵昌,王玮,等. 碳钢在反渗透水中耐蚀性研究[J]. 广州化工,2009,37(4):95-97.
【6】胡家元,曹顺安,谢建丽. 锈层对海水淡化一级反渗透产水中碳钢腐蚀行为的影响[J]. 物理化学学报,2012,28(5):1153-1162.
【7】周东辉,吴善宏,肖丽,等. 碳钢在海水淡化一级反渗透产水中的腐蚀行为[J]. 腐蚀与防护,2012,33(12):1057-1059.
【8】尹力,曹顺安,吴善宏,等. Q235钢在海水及海水淡化一级RO产水中的腐蚀特性研究[J]. 表面技术,2012,41(3):43-46.
【9】BIRNHACK L,VOUTCHKOV N,LAHAV O. Fundamental chemistry and engineering aspects of post-treatment processes for desalinated water-a review[J]. Desalination,2011,273(1):6-22.
【10】刘光洲,王海涛,张茜,等. 一种海水淡化一级反渗透水的缓蚀剂[P]. 中国:CN 101705489,2010.
【11】韦存忠,沈隼睿. 膜法海水淡化技术在玉环电厂的应用[J]. 电力科技与环保,2010,26(5):48-49.
【12】OKAFOR P C,LIU X,ZHENG Y G. Corrosion inhibition of mild steel by ethylamino imidazoline derivative in CO2-saturated solution[J]. Corrosion Science,2009,51(4):761-768.
【13】ORTEGA-TOLEDO D M,GONZALEZ-RODRIGUES J G,CASALES M,et al. CO2 corrosion inhibition of X-120 pipeline steel by a modified imidazoline under flow conditions[J]. Corrosion Science,2011,53(11):3780-3787.
【14】廖强强,陈亚琼,闫爱军,等. 氨基磺酸溶液中烷基咪唑啉对碳钢的缓蚀作用[J]. 中国腐蚀与防护学报,2011,31(5):356-361.
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