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Metallurgist
Published in: Metallurgist 7-8/2020

11-11-2020

Corrosion Resistance Properties of a Nickel–Chromium Steel Bar in Marine Atmosphere

Authors: Bingqiang Wu, Yuanhong Qi, Hemin Zhou, Zongshu Zou

Published in: Metallurgist | Issue 7-8/2020

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Abstract

The corrosion behaviors of Ni–Cr and 20MnSi steel bars in a simulated marine atmosphere are compared using alternate immersion corrosion tests and electrochemical techniques. The microstructure features are characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrochemical measurements and alternate immersion corrosion tests demonstrate that the Ni–Cr steel bar has a more positive potential (– 0.397 V), lower corrosion current density (28.19 μA/cm2), and better corrosion resistance at a corrosion rate of 3.81 g/(m2· h) and corrosion depth of 4.27 mm/g. There are inner and outer rust layers on the Ni–Cr steel bar, the inner layer being dense and bonded to the steel substrate. The α -FeO(OH)/γ -FeO(OH) ratio of the rust layer on the Ni–Cr steel bar is greater, which contributes to a more denser rust layer enhancing corrosion resistance.
previous article Methods for Determining Resistance Indices of Structural Steels under Various Atmospheric Conditions
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Metadata
Title
Corrosion Resistance Properties of a Nickel–Chromium Steel Bar in Marine Atmosphere
Authors
Bingqiang Wu
Yuanhong Qi
Hemin Zhou
Zongshu Zou
Publication date
11-11-2020
Publisher
Springer US
Published in
Metallurgist / Issue 7-8/2020
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-020-01039-z

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