溶胶-凝胶技术提高不锈钢抗高温氧化及铝合金阳极氧化膜的耐蚀性能  

Improvement in the high-temperature oxidation resistance of stainless steel and the corrosion resistance of the anodic oxide films of aluminum alloys by sol-gel technology

作　　者：郭彦飞[1] 张鲲[1,2,3] 刘莉[1] 胡琪[1] 赵君文[1] 韩靖[1] 郑学斌[3] 

机构地区：[1]西南交通大学材料科学与工程学院,成都610031 [2]南车戚墅堰机车有限公司,常州213011 [3]中国科学院无机特种涂层重点实验室,上海200050

出　　处：《北京科技大学学报》2014年第8期1068-1076,共9页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(51201144);中国博士后科学基金资助项目(2013M542288);中央高校基本科研业务费科技创新项目(SWJTU11CX051;2682013CX003);中国科学院无机特种涂层重点实验室开放基金资助项目(KLICM-2012-08);四川省科技成果转化项目(2012CC0012)

摘　　要：采用溶胶--凝胶法在不锈钢基体表面制备ZrO2和Al2O3涂层,并对铝合金阳极氧化膜进行封孔处理.采用高温循环氧化法研究ZrO2和Al2O3涂层抗高温氧化性能,通过电化学阻抗谱和剥蚀法分析溶胶--凝胶法封孔后铝合金氧化膜的耐腐蚀性能.结果表明:ZrO2和Al2O3涂层的抗高温氧化性能随涂层厚度增加而提高;铝合金阳极氧化膜的耐腐蚀性能也随封孔次数的增加而提高,但当封孔处理超过8次后,阻抗值和腐蚀程度基本不随封孔次数发生变化;实施相同次数封孔处理后,Al2O3溶胶的封孔效果略优于ZrO2溶胶的封孔效果.A sol--gel method was applied to prepare ZrO2 and Al2O3coatings on stainless steel（ SS304） substrates and to seal the anodic oxidation films of an aluminum alloy. The high-temperature oxidation resistance of as-prepared ZrO2 and Al2O3coatings was investigated by cyclic high-temperature oxidation tests. The corrosion resistance of the sealed anodic films was investigated by electrochemical impedance spectroscopy（ EIS） and exfoliation corrosion method. The experimental results indicate that the high-temperature oxidation resistance of the ZrO2 and Al2O3coatings is improved with the increasing of coating thickness,and the corrosion resistance of the sealed anodic films is also improved with the increasing times of sealing processes. However,the impedance value and corrosion degree of the sealed anodic films change slightly after more than 8 times of sealing processes. The corrosion resistance of the anodic films sealed with Al2O3 sol performs a little better than those with ZrO2 sol with the same times of sealing processes.

关 键 词：溶胶--凝胶法 不锈钢 铝合金 表面涂层 抗氧化 耐腐蚀 

分 类 号：TG174.4[金属学及工艺—金属表面处理]