Enhanced corrosion resistance properties of Fe–Al–Cr laser cladding coatings on 1045 carbon steel substrates

Fe–Al–Cr coatings with different content of Cr additive were prepared on 1045 carbon steel substrates by a laser cladding process. The incorporation of Cr atoms can effectively enhance the corrosion resistance of the coatings. In particular, the Fe–28Al–5Cr laser cladding coating exhibits the best f...

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Bibliographic Details
Published inHeliyon Vol. 9; no. 3; p. e13855
Main Authors Luo, Xixi, Cao, Jing, Yu, Fangli, Zhang, Yalong, Tang, Jianjiang, Li, Xin, Xie, Hui
Format Journal Article
LanguageEnglish
Published England Elsevier Ltd 01.03.2023
Elsevier
Subjects
Coating
Corrosion resistance
Cr additive
Fe3Al
Laser cladding
Corrosion resistance
Coating
Laser cladding
Cr additive
Fe3Al
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Summary:Fe–Al–Cr coatings with different content of Cr additive were prepared on 1045 carbon steel substrates by a laser cladding process. The incorporation of Cr atoms can effectively enhance the corrosion resistance of the coatings. In particular, the Fe–28Al–5Cr laser cladding coating exhibits the best film quality without phase segregation. In addition, the interfacial adhesion between the Fe–28Al–5Cr coating and the 1045 carbon steel substrate is improved. As a result, the Fe–28Al–5Cr laser cladding coating exhibits the best corrosion resistance in a 3.5 wt% NaCl solution under both immersion and electrochemical conditions. However, excessive Cr additive lead to the formation of Al8Cr5 in the grain boundaries, resulting in inferior corrosion resistance. Therefore, the new findings demonstrated in this work may inspire the design of high-quality coatings with excellent corrosion resistance.
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ISSN:2405-8440
2405-8440
DOI:10.1016/j.heliyon.2023.e13855