论文部分内容阅读
采用料浆法在不锈钢基体表面制备了SiO_2系陶瓷涂层。采用X射线衍射仪和金相显微镜分析了不同工艺下陶瓷涂层的物相组成和微观结构,同时研究了陶瓷涂层的致密性和耐蚀性。结果表明:当陶瓷骨料与水玻璃的比例为1∶10时,在850℃保温30 min可制备出结构致密、均匀和表面质量良好的陶瓷涂层;SiO_2系陶瓷涂层中既存在晶体结构又存在非晶态结构,其中主要成分为SiO_2-Mg O-Cr_2O_3-CaO的S_2配方陶瓷涂层中形成了Cr_5O_(12)等新的物相;SiO_2系陶瓷涂层在Na Cl溶液中表现出优异的耐蚀性。
The slurry method was used to prepare SiO 2 ceramic coating on the surface of stainless steel substrate. The phase composition and microstructure of the ceramic coating were analyzed by X-ray diffraction and metallographic microscope. The compactness and corrosion resistance of the ceramic coating were also studied. The results show that when the ratio of ceramic aggregate to sodium silicate is 1:10, the ceramic coating with dense, uniform and good surface quality can be prepared by holding at 850 ℃ for 30 min. The crystal structure And the amorphous structure exists. The new phase of Cr_5O_ (12) is formed in the S_2 formula ceramic coating with the main component of SiO_2-Mg O-Cr_2O_3-CaO. The SiO_2 ceramic coating shows in NaCl solution Excellent corrosion resistance.