MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Effect of Molybdenum on the Corrosion of Low Alloy Steels in Synthetic Seawater
Su-Bin ShinSol-Ji SongYoung-Woong ShinJung-Gu KimByung-Joon ParkYong-Chan Suh
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2016 Volume 57 Issue 12 Pages 2116-2121

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Abstract

The alloying effect of Mo on the seawater immersion corrosion for low alloy steel was investigated using weight loss tests and electrochemical impedance spectroscopy (EIS) in seawater. The Mo-containing low alloy steel showed an excellent corrosion resistance by the long immersion test due to the formation of homogeneous rust layer preventing active dissolution. SEM and XPS analyses were conducted to observe cross-sectional images of rust layer and indentify chemical composition of oxide formed on the surface after immersion test. The results revealed that the MoO42− ions which were oxidized from Mo form the compounds which disturb the approach of aggressive ions.

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© 2016 The Japan Institute of Metals and Materials
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