TA2+Q345B轧制复合板覆层腐蚀特性研究  

Research on corrosion characteristics of TA2+Q345B rolling composite plate cladding

作　　者：郝英敏 焦四海[1] 闫博[1] HAO Yingmin;JIAO Sihai;YAN Bo(Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China)

机构地区：[1]宝山钢铁股份有限公司中央研究院,上海201999

出　　处：《宝钢技术》2024年第1期23-27,共5页Baosteel Technology

基　　金：国家重点研发计划(2021YFB3701700)。

摘　　要：钛/钢轧制复合板因其优异的耐蚀性和结构性能而广泛应用于化工、海事等领域。因复合板轧制工艺需兼顾钛/钢两者特性而与单一材质的传统生产工艺有所差别,且在冶金结合界面处元素互扩散是否对覆层TA2组织及腐蚀性能产生影响待研究。通过组织观察、能谱测试和电化学腐蚀试验,研究了界面元素互扩散对覆层TA2组织及腐蚀性能的影响。结果表明:冶金结合界面处元素的互扩散距离仅为8~10μm,不足以影响整个覆层组织;覆层TA2耐腐蚀膜成膜初期存在反复腐蚀,但随着静置时间延长而逐渐稳定,不再发生腐蚀。Titanium/steel composite plate is widely used in the chemical industry,marine,and other fields due to its excellent corrosion resistance and structural properties.Because the rolling process of composite plates needs to consider characteristics of both titanium and steel,the process is slightly different from the traditional production process of single materials,and whether the interdiffusion of elements at the metallurgical bonding interface affects the microstructure and corrosion properties of the coating TA2 needs to be studied.The effect of interfacial elements interdiffusion on the microstructure and corrosion properties of TA2 coating was studied using microstructure observation,energy spectrum test,and electrochemical corrosion experiment.The results indicate that the interdiffusion distance of elements at the metallurgical bonding interface is only 8-10μm,which is not enough to affect the microstructure of the entire coating.The TA2 coating corrosion resistant film has repeated corrosion in the initial stage of film formation,but with the extension of static time,it gradually stabilizes and no corrosion occurs.

关 键 词：TA2+Q345B复合板 结合界面 扩散 电化学 

分 类 号：TG172[金属学及工艺—金属表面处理]