Improvement in the liquid zinc corrosion resistance of high Nb-TiAl alloys by pre-oxidation in a SiO_2-powder pack

作     者：SUN PengFei ZHANG LaiQi ZHANG Li LIN JunPin 

作者机构：State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2012年第55卷第2期

页      面：505-509页

核心收录：

学科分类：0810[工学-信息与通信工程] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50871127) the National Basic Research Program of China ("973" Project) (Grant No. 2011CB605500) 

主　　题：二氧化硅粉末 耐腐蚀性 预氧化 TIAI合金 锌液 TiAl合金 氧化铁皮 氧化过程 

摘      要：The influence of pre-oxidation on the liquid zinc corrosion resistance of high Nb-TiAl alloys was *** pre-oxidation was performed by heating the specimens,buried in silica powder and encapsulated in a silica tube under a vacuum of 1.3×10-3 Pa at 950°C for 12 *** results showed that the preoxidized sample exhibited much higher liquid zinc corrosion resistance than that for the comparative *** excellent liquid zinc corrosion resistance was attributed to the formation of high-quality oxide scale during *** corrosion of all the samples in liquid zinc was caused by a localized breakdown in the oxide *** continuous and dense oxide scale formed during preoxidation substantially may prevent the liquid zinc from diffusing to the substrate,and its good continuity may also reduce the possibility of localized breakdown in the oxide scale.