Journal
JOURNAL OF MAGNESIUM AND ALLOYS
Volume 9, Issue 2, Pages 432-455Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2020.07.006
Keywords
Magnesium; Weight loss; Hydrogen evolution; XPS; FTIR; Corrosion inhibition
Categories
Funding
- Defence Materials Technology Centre
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This study found that commercial corrosion inhibiting compounds can effectively reduce the corrosion rates of pure Mg and Mg alloys in NaCl solution, with LPS 3 showing the best corrosion inhibition effect. Different inhibitors form barrier films through different mechanisms of chemical adsorption and physical adsorption, which play a key role in reducing corrosion rates.
This paper studied corrosion of pure Mg and the Mg alloys EV31A, WE43B, ZE41A, coated with commercial corrosion inhibiting compounds (CICs) (LPS 3, LPS2, AMLGuard, Ardrox 3961) immersed in 3.5 wt% (0.6 M) NaCl solution saturated with Mg(OH)(2). All four CICs reduced corrosion rates. LPS 3 resulted in zero corrosion rates and 100% inhibition in most cases. LPS 2 and AMLGuard had comparable inhibition efficiencies, whilst Ardrox 3961 had the lowest inhibition efficiency. Reduction in corrosion rates was tentatively attributed to barrier films formed by chemical adsorption for LPS 3 and AMLGuard, and by physical adsorption for LPS2 and Ardrox 3961. (C) 2020 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.
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