摘要
分别采用静态失重法和电化学测试方法,对TA2/2A12爆炸复合板的耐腐蚀性能进行评价,并与基体母材的耐蚀性能进行了对比。结果表明,钛/铝复合板具有较好的耐蚀性,在人工海水溶液中受到的腐蚀主要集中在2A12母材侧和结合界面处。这是由于Al具有较高的电负性,使其作为原电池的阳极而受到腐蚀。结合界面的腐蚀是由于在界面处产生了局部熔融物和爆炸焊接残余应力所致。在试验条件下,钛/铝复合板的耐腐蚀性能介于两种基体母材之间,抗腐蚀能力大小顺序为:2A12<TA2/2A12<TA2,可以满足工业生产对钛/铝复合板的耐腐蚀性能要求。
Static weight loss experiments and electrochemical tests are respectively performed to evaluate corrosion resistance of TA2/2A12 composite plates of explosive welding, which is compared with that of base metals. The results show that the TA2/ 2A12 composite plate has better corrosion resistance, and the corrosion mainly occurred to the side of 2Al2 base metal and the bonding interface in the artificial sea water. It is because that the Al works as anode because of its higher electronegativity in the system of the galvanic reactions between Ti and Al. The corrosion of interface is created by the local melting and residual stress of explosive welding. Under the experimental conditions, the corrosion resistance of TA2/2A12 is higher than that of the base metal 2A12, and lower than that of TA2. The corrosion resistance of composite plate can meet the requirements of commercial operation.
出处
《石油化工腐蚀与防护》
CAS
2014年第1期6-10,共5页
Corrosion & Protection In Petrochemical Industry
关键词
钛
铝复合板
爆炸焊接
静态失重法
电化学腐蚀
TA2/2A12 composite plate, explosive welding, static weight loss experiment, electrochemical corrosion
