巯基乙酸在预腐蚀过的A3钢表面的吸附行为研究
Adsorption Behaviour of Thioglycolic Acid on Pre-corroded A3 Steel
摘 要
为证实缓蚀剂可以控制已经形成完整膜下的钢表面的腐蚀,采用极化曲线法、交流阻抗技术及理论分析研究了NaHCO3溶液中巯基乙酸(TGA)在FeCO3膜表面的吸附行为及其对A3钢腐蚀行为的影响.结果表明:TGA在腐蚀产物膜上形成了多层吸附,其缓蚀机理为“负催化效应”,浓度为1000 mg/L时具有最好的缓蚀效果；TGA在腐蚀产物膜表面的吸附反应为自发过程,吉布斯自由能为-25.766 kJ/mol.
巯基乙酸
吸附
腐蚀产物膜
sodium bicarbonate
thioglycolic acid
adsorption
corrosion product film
Abstract
In order to confirm the inhibition effect of corrosion product film of A3 steel,the adsorption behaviour of TGA(thioglycolic acid) on FeCO3 surface and its inhibition mechanism in sodium bicarbonate solution were studied by polarization curves,EIS and theoretical analysis.The results indicated that TGA formed a multi-layer film on the surface of FeCO3 and acted as negative catalytic inhibitor,its inhibition effect reached the maximum at the concentration of 1000 mg/L.The adsorption of TGA is spontaneous and the corresponding Gibbs free energy is -25.766 kJ/mol.
中图分类号 TG174.42
所属栏目 试验研究
基金项目
收稿日期 2008/12/8
修改稿日期 2009/1/6
网络出版日期
作者单位点击查看
备注李晓伟,硕士研究生.
引用该论文: LI Xiao-wei,GAO Yan-min,LI Yan-xi. Adsorption Behaviour of Thioglycolic Acid on Pre-corroded A3 Steel[J]. Corrosion & Protection, 2010, 31(1): 10～13
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参考文献
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【2】郭睿,张春生,包亮,等.新型咪唑啉缓蚀剂的合成与应用[J].应用化学,2008,25(4):494-498.
【3】甘复兴,戴忠旭,汪的华,等.中性介质中铜缓蚀剂的成膜过程[J].应用化学,1998,15(4):45-48.
【4】Markin A N,Markina T T.On inhibition of carbon dioxide corrosion accompanied with salt deposition[J].Zashchita Metallov,1992,28(6):946-954.
【5】Dougherty J A,Stegmann D W.Effects of flow on corrosion inhibitor performance[J].Materials Performance,1996,35(4):47-53.
【6】Gulbrandsen E,Nesic S.Effect of precorrosion on the performance of inhibitors for CO2 corrosion of carbon steel[C]//Corrosion 1998:013-016.
【7】Ramachandran S.Interaction and properties of corrosion inhibitors with byproduct layers[J].Corrosion 2001,57(6):508.
【8】Kapusta S D,Rhodes P R,Silvemman S A.Inhibitors testing for CO2 environments[C]//Corrosion 1998:04-07.
【9】Malik H.Influence of C16quatemary amine on surface films and polarization resistance of mild steel in carbon dioxide sutured 5 percent sodium chloride[J].Corrosion 1995,51(4):321-328.
【10】李爱魁,李国敏,郭兴蓬.缓蚀剂在N80钢上吸附行为研究[J].电化学,2003,9(3):314-319.
【11】李桐,高克玮,路民旭.X65钢CO2腐蚀产物膜形成机理[J].中国腐蚀与防护学报,2007,27(6):338-341.
【12】Ikeda A,Ueda M,Mukai S.CO2 corrosion behavior of carbon and Cr steels[C]//Corrosion 1984:19-23.
【13】Kermani M B,Morshed A.Carbon dioxide corrosion in oil and gas production-A compendium[J].Corrosion 2003,59(8):659-662.
【14】曹楚南.关于缓蚀剂研究的电化学方法[J].腐蚀科学与防护技术,1990,2(1):1-9.
【15】曹楚南,张鉴清.电化学阻抗谱导论[M].北京:科学出版社,2002.
【16】EL-AWADY A A,ABD-EL-NABEY B A,AZIZ S G.Kinetic-thermodynamic and adsorption isotherm analyses for the inhibition of the acid corrosion of steel cyclic and open-chain amines[J].Electrochem Soc,1992,139(8):2149-2154.
【17】Abd El Rehim S S,Ibrahim Magdy A M,Khalid K F.The inhibition of 4-(2′-amino-5′-methyphenylazo) antipyrine on corrosion of mild steel in HCl solution[J].Mater Chem Phys,2001,70(3):268-273.
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