烯丙基硫脲对硫酸溶液中钢的吸附与缓蚀作用机理
Inhibition Action of Allyl Thiourea for Steel in H2SO4 Solution
摘 要
用失重法、动电位极化曲线和电化学阻抗谱(EIS)研究了在1.0 mol/L H2SO4中20~50 ℃烯丙基硫脲(ATU)在冷轧钢表面的吸附及缓蚀作用。结果表明: ATU对钢具有好的缓蚀作用, 当ATU浓度仅为2.0 mmol/L时, 缓蚀率大于94%。ATU在钢表面的吸附符合Langmuir吸附模型, 得出相应的吸附热力学参数(吸附自由能ΔG0, 吸附焓ΔH0, 吸附熵ΔS0), 并根据这些参数详细讨论了缓蚀作用机理。ATU为混合抑制型缓蚀剂; EIS谱高频区呈半圆容抗弧而低频区呈小段感抗弧, 添加ATU后电荷转移电阻显著增大。
钢
烯丙基硫脲
缓蚀
吸附
sulfuric acid
steel
allyl thiourea
inhibition
adsorption
Abstract
The inhibition action of allyl thiourea (ATU) on cold rolled steel (CRS) in 1.0 mol/L H2SO4 solution at 20 ℃~50 ℃ was investigated by weight loss, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). The results showed that ATU is a good inhibitor for CRS in H2SO4 solution, and inhibition efficiency was higher than 94% with the inhibitor concentration of 0.2 mmol/L. Three adsorption thermodynamic parameters including adsorption free energy ΔG0, adsorption enthalpy ΔH0 and adsorption entropy ΔS0 were also calculated. The inhibition mechanism was discussed in detail according to the parameters. The adsorption of ATU on CRS surface obeys Langmuir adsorption isotherm equation. Polarization curves showed that ATU acts as a mixed-type inhibitor. All EIS spectra exhibit one capacitive loop at high frequency followed by a small inductive loop at low frequency, and the charge transfer resistance increases remarkably after adding ATU inhibitor.
中图分类号 TG174.42
所属栏目 试验研究
基金项目 云南省教育厅自然科学研究基金项目(09C0181); 西南林业大学林产化工加工工程校级重点学科建设项目(XKX200907)
收稿日期 2011/1/18
修改稿日期 2011/3/7
网络出版日期
作者单位点击查看
备注李向红, 副教授,
引用该论文: LI Xiang-hong,DENG Shu-duan,FU Hui,LI Zi-mei. Inhibition Action of Allyl Thiourea for Steel in H2SO4 Solution[J]. Corrosion & Protection, 2011, 32(12): 958
被引情况:
【1】李小龙,张军平,尹成先,张娟涛, "Cu+对喹啉季铵盐缓蚀性能的影响",腐蚀与防护 34, 886-888(2013)
【2】宁文博,孟玥,徐斌,杨文忠,季燕, "2-吡啶甲醛缩4-苯基氨基硫脲席夫碱在盐酸溶液中对Q235钢的缓蚀作用",腐蚀与防护 37, 876-880(2016)
【3】徐斌,刘瑛,尹晓爽,杨文忠, "2-吡啶甲醛缩氨基硫脲席夫碱在HCl溶液中对Q235钢的缓蚀作用",腐蚀与防护 34, 569-572(2013)
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】Li Xianghong, Mu Guannan. Tween-40 as corrosion inhibitor for cold rolled steel in sulphuric acid:weight loss study, electrochemical characterization, and AFM[J]. Applied Surface Science, 2005, 252:1254-1265.
【2】张天胜. 缓蚀剂[M]. 北京: 化学工业出版社, 2002.
【3】李广超, 路长青, 杨文忠, 等. 硫脲及其衍生物的缓蚀行为研究进展[J]. 腐蚀科学与防护技术, 2001, 13(3): 169-172.
【4】李向红, 邓书端, 付惠, 等. HCl中烯丙基硫脲在钢表面的吸附及缓蚀作用[J]. 清洗世界, 2009, 25(1): 18-22.
【5】Bentiss F, Lebrini M, Lagrenée M. Thermodynamic characterization of metal dissolution and inhibitor adsorption processes in mild steel/2, 5-bis(n-thienyl)-1, 3, 4-thiadiazoles/hydrochloric acid system[J]. Corrosion Science, 2005, 47:2915-2931.
【6】木冠南, 李向红, 屈庆, 等. 稀土铈(IV)离子和钼酸钠在盐酸溶液中对冷轧钢的缓蚀协同作用[J]. 化学学报, 2004, 62(24): 2386-2390.
【7】王佳, 曹楚南. 缓蚀剂阳极脱附现象的研究, IV缓蚀剂浓度极值现象[J]. 中国腐蚀与防护学报, 1996, 16(1): 15-19.
【8】Cao C. On electrochemical techniques for interface inhibitor research[J]. Corrosion Science, 1996, 38:2073-2082.
【9】Lagrenée M, Mernari B, Bouanis M, et al. Study of the mechanism and inhibiting efficiency of 3, 5-bis(4-metylthiophenyl)-4H-1, 2, 4-triazole on mild steel corrosion in acidic media[J]. Corrosion Science, 2002, 44:573-588.
【10】Singh A K, Quraishi M A. Effect of cafazolin on the corrosion of mild steel in HCl solution[J]. Corrosion Science, 2010, 52:152-160.
【2】张天胜. 缓蚀剂[M]. 北京: 化学工业出版社, 2002.
【3】李广超, 路长青, 杨文忠, 等. 硫脲及其衍生物的缓蚀行为研究进展[J]. 腐蚀科学与防护技术, 2001, 13(3): 169-172.
【4】李向红, 邓书端, 付惠, 等. HCl中烯丙基硫脲在钢表面的吸附及缓蚀作用[J]. 清洗世界, 2009, 25(1): 18-22.
【5】Bentiss F, Lebrini M, Lagrenée M. Thermodynamic characterization of metal dissolution and inhibitor adsorption processes in mild steel/2, 5-bis(n-thienyl)-1, 3, 4-thiadiazoles/hydrochloric acid system[J]. Corrosion Science, 2005, 47:2915-2931.
【6】木冠南, 李向红, 屈庆, 等. 稀土铈(IV)离子和钼酸钠在盐酸溶液中对冷轧钢的缓蚀协同作用[J]. 化学学报, 2004, 62(24): 2386-2390.
【7】王佳, 曹楚南. 缓蚀剂阳极脱附现象的研究, IV缓蚀剂浓度极值现象[J]. 中国腐蚀与防护学报, 1996, 16(1): 15-19.
【8】Cao C. On electrochemical techniques for interface inhibitor research[J]. Corrosion Science, 1996, 38:2073-2082.
【9】Lagrenée M, Mernari B, Bouanis M, et al. Study of the mechanism and inhibiting efficiency of 3, 5-bis(4-metylthiophenyl)-4H-1, 2, 4-triazole on mild steel corrosion in acidic media[J]. Corrosion Science, 2002, 44:573-588.
【10】Singh A K, Quraishi M A. Effect of cafazolin on the corrosion of mild steel in HCl solution[J]. Corrosion Science, 2010, 52:152-160.
相关信息
