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Evaluation of 2-(salicylideneimino) thiophenol and other Schiff bases as bronze corrosion inhibitors by electrochemical techniques and surface analysis

Monticelli, Cecilia and Balbo, Andrea and Esvan, Jérôme and Chiavari, Cristina and Martini, Carla and Zanotto, Federica and Marvelli, Lorenza and Robbiola, Luc Evaluation of 2-(salicylideneimino) thiophenol and other Schiff bases as bronze corrosion inhibitors by electrochemical techniques and surface analysis. (2019) Corrosion Science, 148. 144-158. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2018.12.017

Abstract

n this research, different Schiff bases were synthesized and tested as bronze corrosion inhibitors in concentrated synthetic acid rain at pH 3.3. Some of them showed good inhibiting effects, as detected by EIS and polarization curve recording. The most efficient inhibitor (2-(salicylideneimino) thiophenol, SITP) was also tested with ad-dition of sodium dihydrogen phosphate (P). P improved the surface film resistance against breakdown phe-nomena. XPS and SEM investigations showed that SITP and SITP + P significantly hinder decuprification. Moreover, SITP forms a protective layer on bronze, composed of both Cu(I)-SITP complexes and adsorbed in-hibitor molecules. Cu(II) phosphates were also detected with P addition.

Item Type:Article
HAL Id:hal-03033080
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Università di Bologna (ITALY)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Ministère de la culture et de la communication (FRANCE)
Other partners > Università degli Studi di Ferrara - UNIFE (ITALY)
Laboratory name:
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Deposited On:15 Oct 2020 13:04

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