{"title":"Plant extracts as corrosion inhibitors of mild steel in HCl solutions","authors":"Fabrizio Zucchi , Ibrahim Hashi Omar","doi":"10.1016/0376-4583(85)90057-3","DOIUrl":null,"url":null,"abstract":"<div><p>The effects of various plant extracts on the dissolution of mild steel in HCl solutions were studied. The additives investigated were <em>Papaia, Poinciana pulcherrima, Cassia occidentalis</em> and <em>Datura stramonium</em> seeds and <em>Papaia, Calotropis procera B, Azydracta indica</em> and <em>Auforpio turkiale</em> sap. Weight-loss determinations and electrochemical measurements were performed. It was found that all extracts except those of <em>Auforpio turkiale</em> and <em>Azydracta indica</em> reduced the corrosion of steel with an efficiency of 88%–96% in 1 N HCl and with a slightly lower efficiency in 2 N HCl. Both the cathodic evolution of hydrogen and the anodic dissolution of steel are inhibited. We believe that the inhibition action is mostly due to the products of the hydrolysis of the protein content of these plants.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"24 4","pages":"Pages 391-399"},"PeriodicalIF":0.0000,"publicationDate":"1985-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90057-3","citationCount":"132","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surface Technology","FirstCategoryId":"1087","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0376458385900573","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 132
Abstract
The effects of various plant extracts on the dissolution of mild steel in HCl solutions were studied. The additives investigated were Papaia, Poinciana pulcherrima, Cassia occidentalis and Datura stramonium seeds and Papaia, Calotropis procera B, Azydracta indica and Auforpio turkiale sap. Weight-loss determinations and electrochemical measurements were performed. It was found that all extracts except those of Auforpio turkiale and Azydracta indica reduced the corrosion of steel with an efficiency of 88%–96% in 1 N HCl and with a slightly lower efficiency in 2 N HCl. Both the cathodic evolution of hydrogen and the anodic dissolution of steel are inhibited. We believe that the inhibition action is mostly due to the products of the hydrolysis of the protein content of these plants.
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