Influence of Magnesium Ions in the Seawater Environment on the Improvement of the Corrosion Resistance of Low-Chromium-Alloy Steel | Zendy

Sol-Ji Song | Zendy; JungGu Kim | Zendy

Open Access

Influence of Magnesium Ions in the Seawater Environment on the Improvement of the Corrosion Resistance of Low-Chromium-Alloy Steel

Author(s) -

Sol-Ji Song,

JungGu Kim

Publication year - 2018

Publication title -

materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.682

H-Index - 111

ISSN - 1996-1944

DOI - 10.3390/ma11010162

Subject(s) - seawater , corrosion , materials science , dielectric spectroscopy , metallurgy , alloy , chromium , magnesium alloy , magnesium , artificial seawater , oxide , alloy steel , electrochemistry , chemistry , electrode , oceanography , geology

This study examined the synergic effect of alloying the element Cr and the environmental element Mg 2+ ions on the corrosion property of a low-alloy steel in seawater at 60 °C, by means of electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR) tests and weight-loss tests. The Mg 2+ ions in seawater played an important role in lowering the electron transfer of the rust layer in the Cr-containing steel. The corrosion resistance of the Cr-containing steel is superior to that of blank steel in Mg 2+ ions containing seawater. XPS and XRD results indicated that the formation of MgFe₂O₄ and a mixed layer (Cr oxide + FeCr₂O₄ + MgCr₂O₄) improved the corrosion resistance of the low-alloy steel in the seawater.

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