Feasibility Test Study of Thermal Spraying Ceramic Protective Coating on Concrete Surface
SHI Yan1,2, LI Jiazheng1,2, LI Yang1,2, HAN Wei1,2
1 Changjiang River Scientific Research Institute,Wuhan 430010, China 2 Research Center of Water Engineering Safety and Disaster Prevention of Ministry of Water Resources,Wuhan 430010, China
Abstract: In response to the urgent need for durability protection of cement concrete, the innovation of thermal spraying technology is introduced into the field of concrete surface protection. Through the preliminary test of coating adhesion and microstructure, the feasibility of plasma thermal spraying ceramic coating on concrete surface was verified by experiment. The results show that the instantaneous high temperature of the thermal spray process will not damage the concrete matrix. The thickness of the coating was 0.3 mm, and its surface was relatively uniform, but it still needs to be sealed twice to ensure the impermeability and frost resistance of the concrete. The thermal spray coating and the concrete matrix have good interface bonding, with an average adhesion of 3.88 MPa, which exceeds the tensile strength of the matrix itself. The coating relied on phy-sical grasping to bond the substrate, whose microstructure was relatively dense without obvious voids or defects. The research aims to broaden the application field of thermal spraying and the technical system of concrete functional protective coating materials, and improve the comprehensive protection capabilities of concrete in terms of wear resistance, corrosion protection and thermal protection.
石妍, 李家正, 李杨, 韩炜. 混凝土表面热喷涂陶瓷防护涂层的可行性试验研究[J]. 材料导报, 2021, 35(Z1): 238-241.
SHI Yan, LI Jiazheng, LI Yang, HAN Wei. Feasibility Test Study of Thermal Spraying Ceramic Protective Coating on Concrete Surface. Materials Reports, 2021, 35(Z1): 238-241.