预氧化Q235钢在熔融冰晶石中的腐蚀行为  

Corrosion Behavior of Pre-oxidized Q235 Steel in Molten Cryolite

作　　者：刘勇强[1] 林万明[1] 王皓[1] 范晓龙[1] 周起帆[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《热加工工艺》2016年第10期50-53,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51174252);山西省自然科学基金项目(2011011020)

摘　　要：通过静态腐蚀速率试验、腐蚀形貌特征观察和X射线衍射分析,研究了在熔融冰晶石电解质环境中保温不同时间的Q235钢和预氧化处理Q235钢的腐蚀行为。结果表明,Q235钢的静态腐蚀速率大于预氧化Q235钢。预氧化Q235钢氧化层Fe3O4对在熔融冰晶石中Q235钢有一定的保护作用。具有反尖晶石结构的Fe3O4能稳定存在于熔融冰晶石电解质中。The corrosion behavior of Q235 steel and pre-oxidized Q235 steel sample placed in molten cryolite electrolyte for different time was investigated by corrosion rate measurement, corrosion morphology characteristic observation and X-ray diffraction analysis. The results show that： Q235 steel has a higher static thermal corrosion rate than that ofpre-oxidized Q235 steel. The oxides layer Fe304 of pre-oxidized Q235 steel has the certain protective effect for Q235 steel in molten cryolite electrolyte. Fe304 with inverse spinel structure exists naturally as stable compounds in molten cryolite electrolyte.

关 键 词：电解铝 低碳钢 预氧化 热腐蚀 冰晶石 

分 类 号：TG113.231[金属学及工艺—物理冶金]