Wear and Corrosion Resistance of CoCrFeNiSiMoW Medium-Entropy Alloy Coatings on Q235 Steel

Abstract

CoCrFeNiSiMoW medium-entropy alloy coatings (MEACs) were fabricated by plasma-arc surfacing welding on Q235 steel. The microstructures and mechanical properties of CoCrFeNiSiMoW MEACs were studied. CoCrFeNiSiMoW MEACs are made from a mixture of NiCrCoMo cubic (FCC) solid solution phase, (Fe, Ni), Mo1.24Ni0.76, and CoCx phases by XRD analysis. The average hardness values of the one- and two-layer CoCrFeNiSiMoW MEACs obtained were 186 ± 1.56 and 198 ± 1.78 HV, respectively. Compared with the one-layer CoCrFeNiSiMoW coating, the two-layer coating has a better wear performance due to its higher hardness. Its corrosion resistance is better because of its higher Ni content.

Evolution in microstructure, properties of the laser cladding CoCrFeMoNi coatings at different annealing temperatures

“…Fortunately, preparing HEA coating (HEAC) by means of surface engineering technology is an effective way to engineering applications. HEACs have been fabricated by various methods and have become a new research branch in the field of HEAs [1–6].…”

Corrosion and Degradation of Materials

“…With the great efforts of the Guest Editor team, the enthusiastic support of the Editorial Board and the valuable contribution of the participates, this Special Issue has reached a milestone, successfully publishing 31 peer-reviewed papers. It covers a series of research areas ranging from the microstructure characterization of the studied materials which has a great impact on their corrosion performance [11,12], the corrosion behaviors and mechanisms of the structural or novel-designed materials in potential service environments [13][14][15][16][17], the development of new coatings acting as corrosion barriers to protect the materials [18][19][20][21][22], the corrosion model built to predict the corrosion progress of the material investigated [23], and other related areas [24][25][26][27].…”