钛制硫酸铝蒸发器排管的腐蚀机理  

CORROSION MECHANISM FOR Al_2(SO_4)_3 EVAPORATOR TUBES MADE OF TITANIUM

作　　者：刘小光[1] 张树霞[1] 邵景华[1] 万平玉[1] 

机构地区：[1]北京化工学院

出　　处：《中国腐蚀与防护学报》1994年第3期225-230,共6页Journal of Chinese Society For Corrosion and Protection

摘　　要：通过极化曲线、腐蚀失重、热壁钛管试件和长钛管的电化学测试以及氢脆试验研究了钛制硫酸铝蒸发器排管的腐蚀破坏机理．结果表明钛的腐蚀是由于钝化膜破坏而造成的活性溶解和氢脆．钛在该体系中产生氢脆的临界电位为－２７０ｍＶ（相对于饱和甘汞电极）．ＸＰＳ分析结果证实了氢化钛的生成．The present paper describes a study on corrosion mechanism of A12(SO4)3 evaporator tubes made of titanium by means of polarization curve measurements, weight loss tests, hot wall tabe testing and hydrogen embrittlement studies. Results show that the reasons of their failure include active dissolution and hydrogen embrittlement caused by the break down of passive film. The critical potential of hydrogen embrittlement of titanium in A12(SO4)3 is -270mV (SCE). The formation of titanium hydride was proved by XPS analysis.

关 键 词：氢脆 钝化膜 钛材 硫酸铝 蒸发器 腐蚀 

分 类 号：TQ051.62[化学工程]