溶胶-凝胶法制备的ZrO_2涂层对低碳钢腐蚀的防护  

CORROSION PROTECTION OF MILD STEEL BY SOL-GEL ZIRCONIA COATINGS

作　　者：李海滨[1] 梁开明[1] 梅乐夫[1] 顾守仁[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084

出　　处：《腐蚀科学与防护技术》2002年第2期92-94,共3页Corrosion Science and Protection Technology

摘　　要：采用溶胶 -凝胶法在基板上涂覆了ZrO2 涂层 .通过XRD和SEM研究了热处理温度对涂层相结构和形貌的影响 ,采用动电位极化曲线评估了涂覆样品的电化学腐蚀行为 ,并与原始样进行了比较 .结果显示 ,80 0℃和4 0 0℃热处理的涂层有好的耐腐蚀性能 ,并分别提高低碳钢基板的寿命 6 3和 2 4倍 ;相反 ,6 0 0℃热处理的涂层 。Zirconia coatings were deposited on mild steel by sol-gel method.The temperature dependence on phase structure and morphology of coatings were investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM).The electrochemical corrosion of mild steel was evaluated through potentiodynamic polarization curves without and with zirconia coatings.The results show that the coatings heat-treated at 800 and 400℃ for 1h have good corrosion resistance,and increase the life time of the mild steel by a factor of 6.3 and 2.4,respectively.In contrast,the coating obtained at 600℃ have no positive effect on the corrosion resistance of the substrate.

关 键 词：溶胶-凝胶涂层 腐蚀防护 低碳钢 二氧化锆 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG174.21[金属学及工艺—金属学]