Localized corrosion of the Mg alloys with inhibitor-containing coatings: SVET and SIET studies. (January 2016)

• Record Type: Journal Article
• Authors: Gnedenkov, A.S.; Sinebryukhov, S.L.; Mashtalyar, D.V.; Gnedenkov, S.V.
• Is Part Of: Corrosion science. Volume 102(2016)
• Page Start: 269
• Page End: 278
• Publication Date: 2016-01
• Subjects: A. Alloy -- A. Magnesium -- C. Oxidation -- C. Oxide coatings -- C. Passive films; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2015.10.015
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: The way of self-healing coating formation on the Mg alloy has been suggested. SVET and SIET were used for determining the kinetics of the self-healing process. The self-healing mechanism has been studied and described in this work. Inhibitors ability to prevent the corrosion process in the defect zone was studied. Self-healing composite coating avert intensive destruction of the magnesium alloy. Abstract: The way of self-healing coating formation at the surface of magnesium alloys on the base of plasma electrolytic oxidation method (PEO) has been suggested. Scanning Vibrating Electrode Technique (SVET) and Scanning Ion-Selective Electrode Technique (SIET) were used for determining the kinetics and mechanism of the self-healing process. The treatment of the PEO-layer by the solution containing 8-hydroxyquinoline enables one to decrease the current density of the composite coating in 30 times (3.2 μA cm −2 ) in the corrosion-active environment in comparison with the base PEO-coating (100 μA cm −2 ) and avert the intensive destruction of the material.