抗坏血酸缓蚀剂对Q235钢耐蚀性能的影响
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摘要
采用失重法研究L-抗坏血酸缓蚀剂在生产二苯甲酰甲烷的废水中对Q235钢缓蚀性能的影响。用电化学法研究缓蚀剂膜的自腐蚀电流密度、极化腐蚀电流密度和极化阻抗。用SEM研究存在与不存在缓蚀剂膜的Q235钢在极化腐蚀前后的形貌变化。结果表明,在50℃的废水中,L-抗坏血酸的较适宜量0.100g/L;缓蚀剂成膜较适宜时间24h,其缓蚀效率达79%。当存在缓蚀剂膜时,Q235钢自腐蚀电流密度从5.46×10~(-5) A/cm~2降至3.81×10-8 A/cm~2;在0.400V过电势下,极化腐蚀电流密度从6.41×10~(-3) A/cm~2降至4.10×10~(-6) A/cm~2;极化阻抗从198.6Ω·cm~2增加至7546.3Ω·cm~2。SEM测试表明,在0.400V过电势下,无缓蚀剂膜的Q235钢腐蚀十分严重,有缓蚀剂膜的Q235钢几乎不腐蚀。
The ascorbic acid corrosion inhibitor on corrosion properties of Q235 steel in the production wastewater of dibenzoyl methane at 50℃is studied by weight-loss method.The self-corrosion current density,polarization corrosion current density and polarization resistance of corrosion inhibitor film were determined by electrochemical method.The morphology of corrosion inhibitor Q235 steel with and without corrosion inhibitor film is studied by SEM.The result reveals that in the wastewater of 50℃,the best dosage of ascorbic acid is 0.100 g/L,and the optimal time of the corrosion inhibitor film formed is 24 h,and corrosion inhibition efficiency equal to 79%.The self-corrosion current density of Q235 steel is reduced from 5.46×10~(-5) A/cm~2 to 3.81×10~(-8) A/cm~2,when the corrosion inhibitor membrane is present.When the polarization voltage is 0.400 V,the polarization corrosion current density decreases from 6.41×10~(-3) A/cm~2 to 4.10×10~(-6) A/cm~2,and the polarization impedance increases from 198.6Ω·cm~2 to 7546.3Ω·cm~2.The SEM test demonstrates that under the electric potential of 0.400 V,the Q235 steel without corrosion inhibitor film corrosion is very seriously corroded while the Q235 steel with corrosion inhibitor film is hardly corroded.
The ascorbic acid corrosion inhibitor on corrosion properties of Q235 steel in the production wastewater of dibenzoyl methane at 50℃is studied by weight-loss method.The self-corrosion current density,polarization corrosion current density and polarization resistance of corrosion inhibitor film were determined by electrochemical method.The morphology of corrosion inhibitor Q235 steel with and without corrosion inhibitor film is studied by SEM.The result reveals that in the wastewater of 50℃,the best dosage of ascorbic acid is 0.100 g/L,and the optimal time of the corrosion inhibitor film formed is 24 h,and corrosion inhibition efficiency equal to 79%.The self-corrosion current density of Q235 steel is reduced from 5.46×10~(-5) A/cm~2 to 3.81×10~(-8) A/cm~2,when the corrosion inhibitor membrane is present.When the polarization voltage is 0.400 V,the polarization corrosion current density decreases from 6.41×10~(-3) A/cm~2 to 4.10×10~(-6) A/cm~2,and the polarization impedance increases from 198.6Ω·cm~2 to 7546.3Ω·cm~2.The SEM test demonstrates that under the electric potential of 0.400 V,the Q235 steel without corrosion inhibitor film corrosion is very seriously corroded while the Q235 steel with corrosion inhibitor film is hardly corroded.
引文
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[2]王婷婷.海藻酸钠微球包封L-抗坏血酸的制备及其在化妆品中应用[D].无锡:江南大学,2014.
[3]潘寒姁,谢芳,王姣,等.碳酸氢钠与抗坏血酸复合处理对鲜切苹果褐变和品质的影响[J].中国农业大学学报,2015,20(2):114.
[4]丁俭,齐宝坤,毛惠婷,等.抗坏血酸对大豆蛋白乳液抗氧化稳定性的研究[J].中国粮油学报,2017,32(7):67.
[5]顾玲,柯苗,闫璟,等.抗坏血酸在钴钛菁碳糊电极上的电化学行为[J].化学研究与应用,2017,29(2):174.
[6]汤大山,李苗.浅析硫脲-抗坏血酸溶液对水质坤的还原效率[J].广州化工,2016,44(7):160.
[7]黄浩,周秀玲,吕美英.还原性谷胱甘肽-抗坏血酸对酪氨酸酶的拟制作用[J].中国生化药物杂志,2009,30(2):95.
[8]Sirichai Adisakwattana,Thavaree Thilavech,Weerachat Sompong,et al.Interaction between ascorbic acid and gallic acid in a model of furetose-medicted protein glycation and oxidation[J].Electronic Journal of Biothechnology,2017,27(5):32.
[9]XUN Tian,JING Wen,WANG Qian-qian,et al.Biotransformation and production from hansenula anomala to natural ethyl phenylacetate[C].MATEC Web of Conferences,2015(22):05013.
[10]JIN Yue-hua,TAO Da-li,HAO Zhan-qin,et al.Enviornnlenatl stresses and redox sattus of ascobraet[J].Acta Botanica Sinica,2003,45(7):795.
[11]杨植震,白梁,沈兵,等.铁器文物的缓蚀研究(I)-苯并三氮哇对低碳钢的缓蚀作用[J].复旦学报(自然科学版),1994,33(5):584.
[12]朱昆鹏,樊章新,吕艳丽,等.盐酸中2-(3′羟基苯基)-4,5-二(2′-羟基苯基)咪唑对低碳钢的缓蚀性能研究[J].绿色科技,2015(6):297.
[13]周維中.离子液体缓蚀剂缓蚀机理的理论研究[D].昆明:昆明理工大学,2017.
[14]Quraishi M A,Sardar R.二噻唑啉-类新型低碳钢盐酸溶液杂环缓蚀剂[J].国外油田工程,2002,18(6):46.
[15]马丽艳.A酸咪唑啉类缓蚀剂的复配与评价[J].新课程,2015(8):207.
[16]李刚,李晓昆,蒋谭琳,等.Q235钢表面Ni-Cr电镀层的组织及性能[J].材料保护,2017,50(9):63.
[17]李香玉,杨凤,刘桐,等.苯胺四聚体聚乙二醇嵌段共聚物在盐酸介质中对Q235钢的缓蚀性能[J].表面技术,2017,46(11):90.
[18]郑兴文,龚敏,陈仕林.药物莫西沙星对Q235钢在盐酸溶液中的缓蚀作用[J].应用化学,2017,34(8):955.
[19]天津大学物理化学教研室编.物理化学(第六版)[M].北京:高等教育出版社,2017:565.
[20]査全性.电极过程动力学导论(第三版)[M].北京:科学出版社,2002:224.