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Plant extracts as “green” corrosion inhibitors for steel in sulphuric acid

Shi Mo, Hong-Qun Luo, and Nian-Bing Li

Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China

 

E-mail: linb@swu.edu.cn

Abstract: In recent years, plant extracts have become the focus of corrosion inhibitor research due to their low toxicity, easy availability and economical preparation. This review presents most of the recent contributions made to the application of plant extracts as corrosion inhibitors for steel in sulphuric acid, as well as in both hydrochloric acid and sulphuric acid. The constituents, properties, adsorption modes and inhibition mechanisms of these natural products are discussed. Evaluation methods and the factors that influence the corrosion-inhibition efficiency of plant extracts are also summarised.

Keywords: sulphuric acid – carbon steel – plant extracts – corrosion inhibitor – adsorption

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2016-0055

 

Chemical Papers 70 (9) 1131–1143 (2016)

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