为了提高Q235钢的耐腐蚀性能,采用热化学反应法在其表面制备了陶瓷涂层,并对涂层的组织结构和耐腐蚀性能进行了研究.结果表明:微米、纳米SiO_2基陶瓷涂层经600℃固化后,均生成了新物相,具有良好的致密性和结合强度;微米涂层的耐酸、耐碱、耐盐性能分别是基体的4.00,1.07,4.02倍,纳米陶瓷涂层的耐酸、耐碱、耐盐性能分别是基体的17.00,1.79,13.80倍.
Ceramic coatings were prepared on the surface of 0235 steel by using thermal chemical reaction method.The microstructure and corrosion resistance of the resulting ceramic coatings were analyzed.Results show that micro-and nano-SiO_2 coatings are transformed to generate new phases after being cured at 600℃,and the cured ceramic coatings have good compactness and adhesion to substrate.Namely,the resistances to acid,alkaline,and salt of the microSiO_2 coating are 4.00,1.07,and 4.02 times as much as that of the substrate,while the resistances to acid,alkaline,and salt of the nano-SiO_2 coating are 17.00,1.79,and 13.80 times as much as that of the substrate,showing considerably increased corrosion resistance as compared with the substrate.
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