不同搅拌桨的耐腐蚀研究  

Study on Corrosion Resistance of Different Impellers

作　　者：周娴 包崇军[1,2] 吴云峰 赵云[1,2] ZHOU Xian;BAO Chongjun;WU Yunfeng;ZHAO Yun(State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources,Kunming 650503,China;Kunming Metallurgical Institute,Kunming 650031,China)

机构地区：[1]共伴生有色金属资源加压湿法冶金技术国家重点实验室,云南昆明650503 [2]昆明冶金研究院,云南昆明650031

出　　处：《热加工工艺》2018年第16期54-57,共4页Hot Working Technology

基　　金：国家重点实验室科技计划项目(GZ20160109)

摘　　要：对在高压釜内试验10次后的A^#、B^#、C^#搅拌桨（分别为16Mn钢表面堆焊镍的搅拌桨、16Mn钢表面有陶瓷层的搅拌桨和加强筋结构设计的16Mn钢搅拌桨）,通过SEM分析、能谱分析、动电位极化曲线测量对其耐腐蚀性能进行研究。结果表明,三种搅拌桨的腐蚀是由化学腐蚀、磨损腐蚀、应力腐蚀、氧气气蚀等多种腐蚀共同作用的结果。A^#搅拌桨形成了含有Cr、Ni等元素的紧密的钝化层;B^#由于陶瓷层与基体的结合不紧密,导致表层剥离;C^#搅拌桨加强筋的结构设计弥补了基体材料的部分缺陷。三种搅拌桨耐腐蚀性能的排序为A^#〉C^#〉B^#。The corrosion resistance of A^#, B^# and C^# impellers（impeller with surfacing nickel on 16 Mn steel surface,impeller with ceramic coating on 16 Mn steel surface and impeller with the structure design of reinforcing rib, respectively）after 10 times experiments in the autoclave was investigated by SEM analysis, energy dispersion spectrum analysis and potentiodynamic polarization test. The results show that the corrosion of three types of impellers may be the combined effects of chemical corrosion, abrasion corrosion, stress corrosion and oxygen cavitation. A compact passive film composed of Ni and Cr elements forms on A#impeller. The surface layer is stripped in response to the untight combination of ceramic layer and substrate of B#impeller. The reinforcing rib physical design of C#impeller makes up the part defects of substrate material.The order of the corrosion resistance of three impellers is A^#C^#B^#.

关 键 词：耐腐蚀 搅拌桨 极化曲线 钝化 

分 类 号：TG174[金属学及工艺—金属表面处理]