Enhanced corrosion resistance properties of Fe–Al–Cr laser cladding coatings on 1045 carbon steel substrates
Xixi Luo,
Jing Cao,
Fangli Yu,
Yalong Zhang,
Jianjiang Tang,
Xin Li,
Hui Xie
Affiliations
Xixi Luo
School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China; State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China; Corresponding author. School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China.
Jing Cao
School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China
Fangli Yu
School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China
Yalong Zhang
School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China
Jianjiang Tang
School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China; Corresponding author.
Xin Li
School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China
Hui Xie
School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China; Corresponding author.
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.
