Study of Initial Corrosion Behavior of Typical Wheel Steel in Neutral Salt Spray Environment

LI Haoyuan, WANG Shanshan, ZHANG Dawei, XIAO Baoliang, WEI Yangen

doi:10.16577/j.issn.1001-1560.2023.0217

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Materials Protection >

2023 , Vol. 56 >Issue 9: 90 - 97

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0217

Study of Initial Corrosion Behavior of Typical Wheel Steel in Neutral Salt Spray Environment

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(1.Research Institute of Technology of Shougang Group Co.， Ltd.， Beijing 100043， China；2.Beijing Key Laboratory of Green Recyclable Process for Iron ＆ Steel Production Technology， Beijing 100043， China；3.Shougang Jingtang United Iron and Steel Co.， Ltd.， Tangshan 063200， China)

Received date: 2023-03-21

Revised date: 2023-04-12

Accepted date: 2023-05-16

Online published: 2023-09-15

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Abstract

In order to solve the problem of atmospheric corrosion of wheel steels during their service，the initial corrosion behaviors of two kinds of automotive wheel steels 590CL and 780CL at 590 MPa and 780 MPa levels in neutral salt spray environment of 5% NaCl solution were studied by neutral salt spray test.The morphology， structure， corrosion rate and electrochemical behavior of corrosion products after salt spray test were characterized by glow spectrometer， metallographic microscope， scanning electron microscope (SEM)， X-ray diffractometer (XRD)and electrochemical measurement.Results showed that after 48 h in the neutral salt spray test， red rust appeared on the surface of the two wheel steels， and the corrosion rates of the two were 590CL＞780CL.The polarization curves and electrochemical impedance spectroscopy results measured in 3.5%NaCl solution were in good agreement with the above results.Besides， the corrosion products of 590CL and 780CL steels were mainly γ-FeO(OH)， and also contained some α-FeO(OH) and Fe3O4.However， the corrosion products basically had no protective effect on the substrate.

Key words： wheel steel; neutral salt spray test; corrosion product; microstructure; electrochemical test

Cite this article

LI Haoyuan, WANG Shanshan, ZHANG Dawei, XIAO Baoliang, WEI Yangen . Study of Initial Corrosion Behavior of Typical Wheel Steel in Neutral Salt Spray Environment[J]. Materials Protection, 2023 , 56(9) : 90 -97 . DOI: 10.16577/j.issn.1001-1560.2023.0217

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