{"title":"硫脲- zn2 +和l -苯丙氨酸对低碳钢在酸性介质中缓蚀的协同效应","authors":"M. Geetha, J. Sathish, S. Rajendran","doi":"10.22232/stj.2019.07.02.09","DOIUrl":null,"url":null,"abstract":"The formulation consisting of 100 ppm Thiourea, 25 ppm Zn2+ and 250 ppm of L-Phenylalanine has 95% corrosion inhibition efficiency with a synergistic effect among Thiourea, L-Phenylalanine and Zn2+ ions. Polarization study shows that this formulation as a mixed inhibitor. FTIR spectra exposed the presence of Fe2+-Thiourea, Fe2+-L-Phenylalanine complex and Zn(OH)2 in protective film. AFM study confirmed the metal surface smoothness following engrossed in the inhibitor and the presence of formed protective film on the metal surface.","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Synergistic Effect of Thiourea-Zn2+ and L-Phenylalanine on the Inhibition of Corrosion of Mild Steel in Acid Medium\",\"authors\":\"M. Geetha, J. Sathish, S. Rajendran\",\"doi\":\"10.22232/stj.2019.07.02.09\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The formulation consisting of 100 ppm Thiourea, 25 ppm Zn2+ and 250 ppm of L-Phenylalanine has 95% corrosion inhibition efficiency with a synergistic effect among Thiourea, L-Phenylalanine and Zn2+ ions. Polarization study shows that this formulation as a mixed inhibitor. FTIR spectra exposed the presence of Fe2+-Thiourea, Fe2+-L-Phenylalanine complex and Zn(OH)2 in protective film. AFM study confirmed the metal surface smoothness following engrossed in the inhibitor and the presence of formed protective film on the metal surface.\",\"PeriodicalId\":22107,\"journal\":{\"name\":\"Silpakorn University Science and Technology Journal\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Silpakorn University Science and Technology Journal\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.22232/stj.2019.07.02.09\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Silpakorn University Science and Technology Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22232/stj.2019.07.02.09","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
由100 ppm的硫脲、25 ppm的Zn2+和250 ppm的l -苯丙氨酸组成的配方具有95%的缓蚀效率，硫脲、l -苯丙氨酸和Zn2+离子之间具有协同效应。极化研究表明，该配方为混合缓蚀剂。FTIR光谱显示保护膜中存在Fe2+-硫脲、Fe2+- l -苯丙氨酸络合物和Zn(OH)2。原子力显微镜研究证实了金属表面的光滑度，并在金属表面形成了保护膜。
Synergistic Effect of Thiourea-Zn2+ and L-Phenylalanine on the Inhibition of Corrosion of Mild Steel in Acid Medium
The formulation consisting of 100 ppm Thiourea, 25 ppm Zn2+ and 250 ppm of L-Phenylalanine has 95% corrosion inhibition efficiency with a synergistic effect among Thiourea, L-Phenylalanine and Zn2+ ions. Polarization study shows that this formulation as a mixed inhibitor. FTIR spectra exposed the presence of Fe2+-Thiourea, Fe2+-L-Phenylalanine complex and Zn(OH)2 in protective film. AFM study confirmed the metal surface smoothness following engrossed in the inhibitor and the presence of formed protective film on the metal surface.
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