混凝土表面热喷涂陶瓷防护涂层的可行性试验研究

Feasibility Test Study of Thermal Spraying Ceramic Protective Coating on Concrete Surface

针对水泥混凝土长期耐久性防护的迫切需求,将热喷涂技术创新性引入混凝土表面防护领域。通过涂层与基体附着力及粘结面微观结构的初步测试,试验验证了混凝土表面等离子热喷涂陶瓷涂层的可行性。结果表明,通过原材料优选与热喷涂工艺优化,热喷涂过程的瞬间高温对混凝土基体并无损伤。涂层总厚度约0.3 mm,表面结构相对完整均匀,但未能完全封闭基体表面原有的大孔洞。热喷涂层与混凝土基体界面粘接良好,平均附着力达3.88 MPa,超过了基体本身的抗拉强度。涂层依靠物理抓固与基体粘接,微观结构相对致密、无明显空洞或缺陷。研究旨在拓宽热喷涂应用领域及混凝土功能防护涂层材料技术体系,提升混凝土耐磨、防腐及热防护等综合保障能力。

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.