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Open AccessArticle

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

School of Advanced Materials Science and Engineering, Sungkyunkwan University, 300 Chunchun-Dong, Jangan-Gu, Suwon 440-746, Korea
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Materials 2018, 11(1), 162; https://doi.org/10.3390/ma11010162
Received: 1 December 2017 / Revised: 11 January 2018 / Accepted: 18 January 2018 / Published: 20 January 2018
This study examined the synergic effect of alloying the element Cr and the environmental element Mg2+ 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 Mg2+ 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 Mg2+ 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. View Full-Text
Keywords: low-alloy steel; EPMA; electrochemistry; corrosion; rust layer low-alloy steel; EPMA; electrochemistry; corrosion; rust layer
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Song, S.-J.; Kim, J.-G. Influence of Magnesium Ions in the Seawater Environment on the Improvement of the Corrosion Resistance of Low-Chromium-Alloy Steel. Materials 2018, 11, 162.

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