酸性盐溶液中复合缓蚀剂对304不锈钢缓蚀作用的研究
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摘要
为了研究不同缓蚀剂及复合型缓蚀剂对304不锈钢在酸性(pH=1)3.5%氯化钠溶液中的最佳缓蚀效果、最佳复配效果和最佳复配比例,采用失重法、电化学方法、表面形貌观察法、表面接触角和表面张力等表征方法对咪唑、硫脲、铬酸钾这三种物质的缓蚀效果及复配效果进行了研究.结果表明:失重法和表面形貌观察法均显示出三种物质都有一定的缓蚀效果,其缓蚀效率的大小关系为:硫脲>铬酸钾>咪唑,最佳缓蚀时间为24 h;通过极化曲线Tafel外推法、电化学阻抗谱法和表面形貌观察法等均可得出最佳复配效果为硫脲与铬酸钾复配;将100 ppm的硫脲5 mL和100 ppm的铬酸钾5 mL进行复配时(复配比为1∶1)通过表面接触角和表面张力的方法可得最小接触角为46.5°,最小表面张力71.9 mN/m,故最佳复配比为1∶1,即在硫脲与铬酸钾配比为1∶1且时间为24 h时,这种复合型缓蚀剂对304不锈钢的缓蚀效果最佳.
In order to study the best corrosion inhibition effect,the best compounding effect and the best compounding ratio of 304 stainless steel in acidic(pH = 1) 3. 5% sodium chloride solution with different corrosion inhibitors and compound corrosion inhibitors,the corrosion inhibition effect and compounding effect of three kinds of substances such as imidazole,thiourea and potassium chromate were studied by the method of electrochemistry,electrochemical observation,surface morphology observation,surface contact angle and surface tension. The results showed all three kinds of materials had certain corrosion inhibition effect by using the weight loss method and the surface morphology observation method. The inhibition efficiency of the three kinds of materials was as follows: thiourea > potassium chromate > imidazole,and the best corrosion inhibition time was 24 h. The best compounding effect for thiourea and potassium chromate could be obtained by the polarization curve of Tafel extrapolation method,electrochemical impedance spectroscopy and surface morphology observation. It had the minimum contact angle of 46. 5° and the minimum surface tension of71. 9 m N/m at the compounding ratio of 1∶ 1 which was 5 mL100 ppm of thiourea and 5 mL100 ppm potassium chromate complex by the surface contact angle and the surface tension method,so the best compound ratio was1∶ 1. When the ratio of thiourea and potassium chromate was 1 ∶ 1 and the time was 24 h,it had the best corrosion inhibition effect on 304 stainless steel.
In order to study the best corrosion inhibition effect,the best compounding effect and the best compounding ratio of 304 stainless steel in acidic(pH = 1) 3. 5% sodium chloride solution with different corrosion inhibitors and compound corrosion inhibitors,the corrosion inhibition effect and compounding effect of three kinds of substances such as imidazole,thiourea and potassium chromate were studied by the method of electrochemistry,electrochemical observation,surface morphology observation,surface contact angle and surface tension. The results showed all three kinds of materials had certain corrosion inhibition effect by using the weight loss method and the surface morphology observation method. The inhibition efficiency of the three kinds of materials was as follows: thiourea > potassium chromate > imidazole,and the best corrosion inhibition time was 24 h. The best compounding effect for thiourea and potassium chromate could be obtained by the polarization curve of Tafel extrapolation method,electrochemical impedance spectroscopy and surface morphology observation. It had the minimum contact angle of 46. 5° and the minimum surface tension of71. 9 m N/m at the compounding ratio of 1∶ 1 which was 5 mL100 ppm of thiourea and 5 mL100 ppm potassium chromate complex by the surface contact angle and the surface tension method,so the best compound ratio was1∶ 1. When the ratio of thiourea and potassium chromate was 1 ∶ 1 and the time was 24 h,it had the best corrosion inhibition effect on 304 stainless steel.
引文
[1]K H,SHEK C H,LAI J K L.Rencent development instainless steels[J].Materials Science&Engineering R,2009,65(4-6):39-42.
[2]XING Xuegang,HAN Zhijun,WANG Hefeng,et al.Electrochemical corrosion resistance of Ce O2-Cr/Ti coatings on 304 stainless steel via pack cementation[J].Journal of Rare Earths,2015,10:1002-0721.
[3]ILEVBARE G O,BURSTEIN G T.The inhibition of pitting corrosion of stainless steels by chromate and molybdate ions[J].Corrosion Science,2003,1545-1569.
[4]TIAN Wenming,DU Nan,LI Songmei,et al.Metastable pitting corrosion of 304 stainless steel in 3.5%Na Cl solution[J].Corrosion Science,2014,85:372.
[5]LI Yang,ZHANG Shangzhou,HE Yongyong,et al.Characteristics of the nitrided layer formed on AISI 304austenitic stainless steel by high temperature nitriding assisted hollow cathode discharge[J].Materials&Design,2014,64:527.
[6]ALBRIMI Y A,ADDI A A,DOUCH J,et al.Inhibition of the pitting corrosion of 304 stainless steel in 0.5 M hydrochloric acid solution by heptamolybdate ions[J].Corrosion Science,2015,90:522
[7]SUN Caixia,XU Huiwu,CHEN Yanmin,et al.Research of corrosion inhibitor composed by sodium molybdate[J].Applied Chemical Industry,2013,42(9):1608-1613.
[8]ZAKARIA K,HAMDY A,ABBAS M A,et al.New organic compounds based on siloxane moiety as corrosion inhibitors for carbon steel in HCl solution:weight loss,electrochemical and surface studies[J].Journal of the Taiwan Institute of Chemical Engineers,2016,65,530-543.
[9]YADAV M,GOPE L,SARKAR T K.Synthesized amino acid compounds as eco-friendly corrosion inhibitors for mild steel in hydrochloric acid solution:electrochemical and quantum studies[J].Research on Chemical Intermediates,2016,42(3):2641-2660.
[10]KOSARI A,MOAYED M H,DAVOODI A.Electrochemical and quantum chemical assessment of two organic compounds from pyridine derivatives as corrosion inhibitors for mild steel in HCl solution under stagnant condition and hydrodynamic flow[J].Corrosion Science,2014,78:138-150.
[11]SHEN Changbin,YANG Ye,GE Jingping[J].Effect of compounded inhibitor on the electrochemical behaviour of 2024 aluminum alloy after severe plastic deformation in the ambient corrosive aquous solution[J].Rare Metal Materialsand Engineering,2013,42(2):529-532.
[12]YAN Qianru,MA Yangmin,YANG Xiufang,et al.Synthesis and performance of imidazoline corrosion inhibitor from platycladus orientalis seed oil[J].Journal of Northwest Forestry College,2013,130-133,226.
[13]FUJIMON T,NAKAMURA M,TAKAOKA M,et al.Synergetic inhibition of thermochemical formation of chlorinated aromatics by sulfur and nitrogen from thiourea:multielement characterization[J].Journal of Hazardous Materials,2016.02.054.
[14]SHANKARAIAH N,KUMAR P N,AMULA B S.One-pot synthesis of podophyllotoxin-thiourea congeners by employing NH2SO3H/Nal:anticancer activity,DNA topoisomerase-ll inhibitor,and apoptosis inducing agents[J].Bioorganic&Medicinal Chemistry Letters,2015,25(19):4239-4244.
[15]BENTISS F,TRAISNEL M.Inhibitor effects of triazole derivatives on corrosion of mild steel in acidic media[J].British Corrosion Journal,2000,34(4):315-320.
[16]寇沙沙,李智丽,靳燕.扫描电镜在金属材料检测的应用[J].包钢科技,2016.01.012.KOU Shasha,LI Zhili,JIN Yan.Application of scanning electron microscopy in metallic materials[J].Baogang Technology,2016.01.012.DOI:10.1364/j.cnki.btgkj.2016.01.012
[17]WANG Yishan.Adsorption and corrosion inhibition of several organic inhibitors on carbon steel in simulated concrete pore solution[D].Beijing:Beijing University of Chemical Technology,2016.
[18]CARDONA C,TORRES A A.Assessment of dimethyl benzodiimidazoles as corrosion inhibitor of austenitic stainless steel grade 316L in acid medium[J].Electrochemistry Science,2015,10:1966-1978.
[19]ELSENER B,ADDARI D,CORAY S.Nickel-free manganese bearing stainless steel in alkaline mediaelecrochemistry and surface chemistry[J].Electrochimica Acta,2011,56(12):4489-4497.
[20]BETOVA I,BOJINOV M,KINNUNEN P,et al.Surface film electrochemistry of austerities stainless steel and its main constituents in supercritical water[J].Jsupflu.2007.06.005.
[21]SOUZA R P,FERRARI V J,GUEDES C I.Low toxic polymeric surfactant as a corrosioninhibitor for mild steel in hydrochloric acid medium[J].Emerald,ACMM-01-2015-1485
[2]XING Xuegang,HAN Zhijun,WANG Hefeng,et al.Electrochemical corrosion resistance of Ce O2-Cr/Ti coatings on 304 stainless steel via pack cementation[J].Journal of Rare Earths,2015,10:1002-0721.
[3]ILEVBARE G O,BURSTEIN G T.The inhibition of pitting corrosion of stainless steels by chromate and molybdate ions[J].Corrosion Science,2003,1545-1569.
[4]TIAN Wenming,DU Nan,LI Songmei,et al.Metastable pitting corrosion of 304 stainless steel in 3.5%Na Cl solution[J].Corrosion Science,2014,85:372.
[5]LI Yang,ZHANG Shangzhou,HE Yongyong,et al.Characteristics of the nitrided layer formed on AISI 304austenitic stainless steel by high temperature nitriding assisted hollow cathode discharge[J].Materials&Design,2014,64:527.
[6]ALBRIMI Y A,ADDI A A,DOUCH J,et al.Inhibition of the pitting corrosion of 304 stainless steel in 0.5 M hydrochloric acid solution by heptamolybdate ions[J].Corrosion Science,2015,90:522
[7]SUN Caixia,XU Huiwu,CHEN Yanmin,et al.Research of corrosion inhibitor composed by sodium molybdate[J].Applied Chemical Industry,2013,42(9):1608-1613.
[8]ZAKARIA K,HAMDY A,ABBAS M A,et al.New organic compounds based on siloxane moiety as corrosion inhibitors for carbon steel in HCl solution:weight loss,electrochemical and surface studies[J].Journal of the Taiwan Institute of Chemical Engineers,2016,65,530-543.
[9]YADAV M,GOPE L,SARKAR T K.Synthesized amino acid compounds as eco-friendly corrosion inhibitors for mild steel in hydrochloric acid solution:electrochemical and quantum studies[J].Research on Chemical Intermediates,2016,42(3):2641-2660.
[10]KOSARI A,MOAYED M H,DAVOODI A.Electrochemical and quantum chemical assessment of two organic compounds from pyridine derivatives as corrosion inhibitors for mild steel in HCl solution under stagnant condition and hydrodynamic flow[J].Corrosion Science,2014,78:138-150.
[11]SHEN Changbin,YANG Ye,GE Jingping[J].Effect of compounded inhibitor on the electrochemical behaviour of 2024 aluminum alloy after severe plastic deformation in the ambient corrosive aquous solution[J].Rare Metal Materialsand Engineering,2013,42(2):529-532.
[12]YAN Qianru,MA Yangmin,YANG Xiufang,et al.Synthesis and performance of imidazoline corrosion inhibitor from platycladus orientalis seed oil[J].Journal of Northwest Forestry College,2013,130-133,226.
[13]FUJIMON T,NAKAMURA M,TAKAOKA M,et al.Synergetic inhibition of thermochemical formation of chlorinated aromatics by sulfur and nitrogen from thiourea:multielement characterization[J].Journal of Hazardous Materials,2016.02.054.
[14]SHANKARAIAH N,KUMAR P N,AMULA B S.One-pot synthesis of podophyllotoxin-thiourea congeners by employing NH2SO3H/Nal:anticancer activity,DNA topoisomerase-ll inhibitor,and apoptosis inducing agents[J].Bioorganic&Medicinal Chemistry Letters,2015,25(19):4239-4244.
[15]BENTISS F,TRAISNEL M.Inhibitor effects of triazole derivatives on corrosion of mild steel in acidic media[J].British Corrosion Journal,2000,34(4):315-320.
[16]寇沙沙,李智丽,靳燕.扫描电镜在金属材料检测的应用[J].包钢科技,2016.01.012.KOU Shasha,LI Zhili,JIN Yan.Application of scanning electron microscopy in metallic materials[J].Baogang Technology,2016.01.012.DOI:10.1364/j.cnki.btgkj.2016.01.012
[17]WANG Yishan.Adsorption and corrosion inhibition of several organic inhibitors on carbon steel in simulated concrete pore solution[D].Beijing:Beijing University of Chemical Technology,2016.
[18]CARDONA C,TORRES A A.Assessment of dimethyl benzodiimidazoles as corrosion inhibitor of austenitic stainless steel grade 316L in acid medium[J].Electrochemistry Science,2015,10:1966-1978.
[19]ELSENER B,ADDARI D,CORAY S.Nickel-free manganese bearing stainless steel in alkaline mediaelecrochemistry and surface chemistry[J].Electrochimica Acta,2011,56(12):4489-4497.
[20]BETOVA I,BOJINOV M,KINNUNEN P,et al.Surface film electrochemistry of austerities stainless steel and its main constituents in supercritical water[J].Jsupflu.2007.06.005.
[21]SOUZA R P,FERRARI V J,GUEDES C I.Low toxic polymeric surfactant as a corrosioninhibitor for mild steel in hydrochloric acid medium[J].Emerald,ACMM-01-2015-1485