|
|
Organic/inorganic Compound Corrosion Inhibitor of L921A Steel in NaCl Solution |
Zhenning CHEN,Rihui CHEN,Jinjie PAN,Yanna TENG,Xingyue YONG( ) |
State Key Laboratory of Organic Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China |
|
|
Abstract A non-toxic and compound organic-inorganic corrosion inhibitor was prepared with cerium salt, polyphosphate, Zn-salt, borate and organic polymer as raw materials, and then the effect of which on the corrosion of alloy steel L921A in 3.5%(mass fraction) NaCl solution was studied by weight loss measurement in conjunction with orthogonal method. The results show that the corrosion inhibitor was an anodic corrosion inhibitor with inhibition efficiency 97% for alloy steel L921A. The electrochemical impedance spectroscopy (EIS) spectrum of the alloy steel L921A in 3.5%NaCl solution was composed of a high frequency capacitive loop and a low frequency inductive loop with two time-constants, indicating that the alloy steel L921A presented pitting susceptibility in 3.5%NaCl solution. When the corrosion inhibitor was added to the 3.5%NaCl solution, the EIS spectrum of the alloy steel L921A presented only a single capacitive loop with one time-constant. After immersion in 3.5%NaCl solution for 35 h, the electrochemical impedance of the steel increased from 103 Ωcm2 to 1.1×104 Ωcm2. In this case, the coverage of the corrosion inhibitor reached about 80% of the surface of the alloy steel L921A.
|
Received: 02 May 2017
|
[1] | Yu H, Wu J H, Qian J H, et al.Study on the inhibition behavior of a new kind corrosion inhibitor in seawater[J]. J. Chin. Soc. Corros. Prot., 2003, 23(5): 40 | [1] | (于辉, 吴建华, 钱建华 等. 一种海水缓蚀剂缓蚀行为的研究 [J]. 中国腐蚀与防护学报, 2003, 23(5): 40) | [2] | Ivu?i? F, Lahodny-?arc O, ?urkovi? H O, et al. Synergistic inhibition of carbon steel coroosion in seawater by cerium chloride and sodium gluconate[J]. Corros. Sci., 2015, 98: 88 | [3] | S?ylev T A, Richardson M G.Corrosion inhibitors for steel in concrete: State-of-the-art report[J]. Constr. Build. Mater., 2008, 22: 609 | [4] | Cao C N.Electrochemical Corrosion [M]. Beijing: Chemical Industry Press, 1994 | [4] | (曹楚南. 腐蚀电化学 [M]. 北京: 化学工业出版社, 1994) | [5] | Goldie B P F, Mccarroll J J. Method of inhibiting metal corrosion in aqueous systems [P]. EP, EP 0136860A2, 1985 | [6] | Yadav M, Behera D, Sharma U.Nontoxic corrosion inhibitors for N80 steel in hydrochloric acid[J]. Arab. J. Chem., 2016, 9: S1487 | [7] | Lin Y Z.Corrosion and Corrosion Control Principle [M]. Beijing: Sinopec Press, 2007 | [7] | (林玉珍. 腐蚀和腐蚀控制原理 [M]. 北京: 中国石化出版社, 2007) | [8] | Gaupp R H, Nygren Jr J A. Corrosion inhibitor [P]. US, US3992318 A, 1976 | [9] | Lin H C.Progress in research of inhibitors[J]. Corros. Sci. Prot. Technol., 1997, 9: 308 | [9] | (林海潮. 缓蚀剂研究的进展[J]. 腐蚀科学与防护技术, 1997, 9: 308) | [10] | Lin Y T, Hou B R.Progress on natural environmental friendly corrosion inhibitors for metals[J]. Corros. Sci. Prot. Technol., 2006, 18: 37 | [10] | (李言涛, 侯保荣. 天然环保型缓蚀剂近期研究进展[J]. 腐蚀科学与防护技术, 2006, 18: 37) | [11] | Yu G J, Tang B.Electrochemical methods of inhibitor research[J]. J. Chin. Soc. Corros. Prot., 2009, 29: 76 | [11] | (余国骏, 汤兵. 缓蚀剂研究中的电化学方法[J]. 中国腐蚀与防护学报, 2009, 29: 76) | [12] | Cao C N, Zhang J Q.An Introduction to Electrochemical Impedance Spectroscopy [M]. Beijing: Science Press, 2002: 86 | [12] | (曹楚南, 张鉴清. 电化学阻抗谱导论 [M]. 北京: 科学出版社, 2002: 86 | [13] | Zhang J T, Hu J M, Zhang J Q, et al.Studies of water transport behavior and impedance models of epoxy-coated metals in NaCl solution by EIS[J]. Prog. Org. Coat., 2004, 51: 145 | [14] | Orazem M E, Tribollet B.Electrochemical Impedance Spectroscopy[M]. Hoboken: John Wiley & Sons, Inc., 2008 | [15] | Brug G J, van den Eeden A L G, Sluyters-Rehbach M, et al. The analysis of electrode impedances complicated by the presence of a constant phase element[J]. J. Electroanal. Chem. Interfacial Electrochem., 1984, 176: 275 |
|
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|