The Corrosion Resistance and Mechanism of AT13/Fe-based Amorphous Composite Coatings

Zhenhua Chu; Shikun Teng; Yuyun Zhou; Xingwei Zheng; Jingxiang Xu; Fang Wang; Baosen Zhang

doi:10.20944/preprints202111.0532.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 26 November 2021 / Approved: 29 November 2021 / Online: 29 November 2021 (12:32:17 CET)

In the present study, the corrosion resistance of amorphous coating and composite coatings in 3.5 wt.% NaCl, 0.5 M H₂SO₄ and 10 wt.% NaOH solution were studied. The composite coatings exhibit superior corrosion resistance. When the content of AT13 （Al₂O₃–13 wt.% TiO₂）was 15 wt.%, the composite coating has the lowest corrosion current density (1.75×10^-6A cm^-2), which is 5.14×10^-5A cm^-2 for Fe-based metallic glassy coating, and the highest corrosion potential (-411 mV), which is -580 mV for Fe-based metallic glassy coating. The breakdown potential of the passivation film in 3.5 wt.% NaCl solution was much higher than that of 316L.The long-time immersion corrosion tests carried out on different coatings showed that the corrosion protection effect of coating was enhanced with the increase of the amount of AT13 added.

Fe-based amorphous coating; AT13; Plasma spraying; Corrosion resistance

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The Corrosion Resistance and Mechanism of AT13/Fe-based Amorphous Composite Coatings

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