期刊名称：Case Studies in Chemical and Environmental Engineering
印刷版ISSN：2666-0164
出版年度：2020
卷号：2
页码：1-8
DOI：10.1016/j.cscee.2020.100058
语种：English
出版社：Elsevier
摘要：AbstractCorrosion protection performance of leaf extracts fromStylosanthes gracilison 304 L steel in H2SO4solution was evaluated using weight loss, electrochemical and surface morphological examinations. Results obtained indicate that the extracts displayed good protection against corrosion of 304 L in H2SO4.From thermodynamics and adsorption considerations the extracts acted as a mixed-type inhibitor at an optimum concentration of 1.2 g/l. The adsorption of the extract on 304 L stainless steel surface was found to be endothermic and obeyed the Langmuir adsorption isotherm. The protection performance of the extract was confirmed through scanning electron microscopy examinations which revealed a lower population density and degree of pitting corrosion on the specimen immersed in inhibited sulfuric acid as compared to the uninhibited specimens which were massively decorated with pits of various dimensions.
关键词：KeywordsenStylosanthes gracilisMixed-type inhibitorHalf-lifeAustenitic stainless steelPhysisorption and chemisorption
