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AuthorEl Wanees, S. Abd
AuthorRadwan, A. Bahgat
AuthorAlsharif, M.A.
AuthorEl Haleem, S.M. Abd
Available date2020-11-04T10:00:40Z
Publication Date2017
Publication NameMaterials Chemistry and Physics
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.matchemphys.2016.12.048
URIhttp://hdl.handle.net/10576/16900
AbstractInitiation and inhibition of pitting corrosion on reinforcing steel in saturated, naturally aerated Ca(OH)2 solutions, under natural corrosion conditions, are followed through measurements of corrosion current, electrochemical impedance spectroscopy and SEM investigation. Induction period for pit initiation and limiting corrosion current for pit propagation are found to depend on aggressive salt anion and cation-types, as well as, concentration. Ammonium chlorides and sulfates are more corrosive than the corresponding sodium salts. Benzotriazole and two of its derivatives are found to be good inhibitors for pitting corrosion of reinforcing steel. Adsorption of these compounds follows a Langmuir adsorption isotherm. The thermodynamic functions ?E?, ?H? and ?S? for pitting corrosion processes in the absence and presence of inhibitor are calculated and discussed.
Languageen
PublisherElsevier Ltd
SubjectAdsorption isotherm
Benzotriazoles
Electrochemical techniques
Pitting corrosion
Reinforcing steel
TitleInitiation and inhibition of pitting corrosion on reinforcing steel under natural corrosion conditions
TypeArticle
Pagination79-95
Volume Number190
dc.accessType Abstract Only


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