Inhibitive effect of sodium molybdate on corrosion of AZ31 magnesium alloy in chloride solutions

Maria A. Osipenko; Dzmitry S. Kharytonau; Aliaksandr A. Kasach; Jacek Ryl; Janusz Adamiec; Irina I. Kurilo

doi:10.1016/j.electacta.2022.140175

Inhibitive effect of sodium molybdate on corrosion of AZ31 magnesium alloy in chloride solutions

Maria A. Osipenko
, Dzmitry S. Kharytonau
, Aliaksandr A. Kasach
, Jacek Ryl
, Janusz Adamiec
, Irina I. Kurilo

Department of Metallurgy and Recycling (RM/RM2)

Belarusian State Technological University
Jerzy Haber Institute of Catalysis and Surface Chemistry PAS
Gdańsk University of Technology

Research output: Contribution to journal › Article › peer-review

58 Citations (Scopus)

Abstract

In this work, corrosion inhibition of the AZ31 magnesium alloy was investigated in NaCl solutions containing different amounts of sodium molybdate inhibitor. Electrochemical, hydrogen evolution, microscopic, and spectroscopic experiments were utilized to examine the mechanism of corrosion inhibition by molybdates. The results showed that Na₂MoO₄ inhibitor provides reliable inhibition at high concentrations (150 mM). Surface examination by Raman and XPS spectroscopy confirmed the formation of a protective surface layer of mixed Mo(VI, V, IV) species. Based on these results, the mechanism of corrosion inhibition of the AZ31 alloy by aqueous molybdates was proposed.

Original language	English
Article number	140175
Journal	Electrochimica Acta
Volume	414
DOIs	https://doi.org/10.1016/j.electacta.2022.140175
Publication status	Published - 10 May 2022

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Corrosion
Corrosion mechanism
EIS
Magnesium alloy
Molybdate Inhibitor
XPS

ASJC Scopus subject areas

General Chemical Engineering
Electrochemistry

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10.1016/j.electacta.2022.140175

Cite this

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title = "Inhibitive effect of sodium molybdate on corrosion of AZ31 magnesium alloy in chloride solutions",

abstract = "In this work, corrosion inhibition of the AZ31 magnesium alloy was investigated in NaCl solutions containing different amounts of sodium molybdate inhibitor. Electrochemical, hydrogen evolution, microscopic, and spectroscopic experiments were utilized to examine the mechanism of corrosion inhibition by molybdates. The results showed that Na2MoO4 inhibitor provides reliable inhibition at high concentrations (150 mM). Surface examination by Raman and XPS spectroscopy confirmed the formation of a protective surface layer of mixed Mo(VI, V, IV) species. Based on these results, the mechanism of corrosion inhibition of the AZ31 alloy by aqueous molybdates was proposed.",

keywords = "Corrosion, Corrosion mechanism, EIS, Magnesium alloy, Molybdate Inhibitor, XPS",

author = "Osipenko, \{Maria A.\} and Kharytonau, \{Dzmitry S.\} and Kasach, \{Aliaksandr A.\} and Jacek Ryl and Janusz Adamiec and Kurilo, \{Irina I.\}",

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year = "2022",

month = may,

day = "10",

doi = "10.1016/j.electacta.2022.140175",

language = "English",

volume = "414",

journal = "Electrochimica Acta",

issn = "0013-4686",

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}

TY - JOUR

T1 - Inhibitive effect of sodium molybdate on corrosion of AZ31 magnesium alloy in chloride solutions

AU - Osipenko, Maria A.

AU - Kharytonau, Dzmitry S.

AU - Kasach, Aliaksandr A.

AU - Ryl, Jacek

AU - Adamiec, Janusz

AU - Kurilo, Irina I.

PY - 2022/5/10

Y1 - 2022/5/10

N2 - In this work, corrosion inhibition of the AZ31 magnesium alloy was investigated in NaCl solutions containing different amounts of sodium molybdate inhibitor. Electrochemical, hydrogen evolution, microscopic, and spectroscopic experiments were utilized to examine the mechanism of corrosion inhibition by molybdates. The results showed that Na2MoO4 inhibitor provides reliable inhibition at high concentrations (150 mM). Surface examination by Raman and XPS spectroscopy confirmed the formation of a protective surface layer of mixed Mo(VI, V, IV) species. Based on these results, the mechanism of corrosion inhibition of the AZ31 alloy by aqueous molybdates was proposed.

AB - In this work, corrosion inhibition of the AZ31 magnesium alloy was investigated in NaCl solutions containing different amounts of sodium molybdate inhibitor. Electrochemical, hydrogen evolution, microscopic, and spectroscopic experiments were utilized to examine the mechanism of corrosion inhibition by molybdates. The results showed that Na2MoO4 inhibitor provides reliable inhibition at high concentrations (150 mM). Surface examination by Raman and XPS spectroscopy confirmed the formation of a protective surface layer of mixed Mo(VI, V, IV) species. Based on these results, the mechanism of corrosion inhibition of the AZ31 alloy by aqueous molybdates was proposed.

KW - Corrosion

KW - Corrosion mechanism

KW - EIS

KW - Magnesium alloy

KW - Molybdate Inhibitor

KW - XPS

UR - https://www.scopus.com/pages/publications/85126547457

U2 - 10.1016/j.electacta.2022.140175

DO - 10.1016/j.electacta.2022.140175

M3 - Article

AN - SCOPUS:85126547457

SN - 0013-4686

VL - 414

JO - Electrochimica Acta

JF - Electrochimica Acta

M1 - 140175

ER -

Inhibitive effect of sodium molybdate on corrosion of AZ31 magnesium alloy in chloride solutions

Abstract

UN SDGs

Keywords

ASJC Scopus subject areas

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