高速电弧喷涂Fe基非晶涂层的晶化行为及其电化学腐蚀特性  

Crystallization Behavior and Electrochemical Corrosion Characteristic of High Velocity Wire Arc Sprayed Fe-based Amorphous Coating

作　　者：林尽染 王泽华[2] 程江波[2] 康敏[1] 洪晟[2] LIN Jinran;WANG Zehua;CHENG Jiangbo;KANG Min;HONG Sheng(College of Engineering,Nanjing Agricultural University,Nanjing 210031,China;College of Mechanics and Materials,Hohai University,Nanjing 211100,China)

机构地区：[1]南京农业大学工学院,江苏南京210031 [2]河海大学力学与材料学院,江苏南京211100

出　　处：《热加工工艺》2023年第16期99-103,共5页Hot Working Technology

基　　金：国家自然科学基金项目(52109091);江苏省自然科学基金项目(BK20210409)。

摘　　要：利用高速电弧喷涂技术制备了FeNiCrBSiNbW非晶涂层,随后对其进行了不同温度的晶化处理;探讨了Fe基非晶涂层的晶化行为及其对电化学腐蚀特性的影响规律。采用X射线衍射仪、扫描电镜、差示扫描量热仪、电化学工作站对不同温度晶化处理后涂层的组织结构和电化学腐蚀行为进行表征。结果表明:随晶化处理温度的升高,FeNiCrBSiNbW非晶涂层的非晶相含量与孔隙率逐渐降低,涂层在3.5 wt%NaCl溶液中的耐腐蚀性逐渐下降,喷涂态涂层中高的非晶相含量以及低的硼化物含量均有助于其耐腐蚀能力的提升。FeNiCrBSiNbW amorphous coatings were prepared by high velocity wire arc spraying and were subsequently annealed at different temperatures.The crystallization behavior and its influence on the electrochemical corrosion characteristic of Fe-based amorphous coating were investigated.The microstructure and electrochemical corrosion behavior of the as-sprayed and annealed FeNiCrBSiNbW coatings were characterized by XRD,SEM,DSC and electrochemical system.The results show that with increasing annealing temperature,FeNiCrBSiNbW coatings show reductions in amorphous content and porosity,indicating degraded anti-corrosion performance in 3.5 wt%NaCl.The superior anti-corrosion performance of the as-sprayed FeNiCrBSiNbW coating is attributed to the high amorphous phase content and the absence of borides in the coating.

关 键 词：高速电弧喷涂 Fe基非晶涂层 晶化 腐蚀 

分 类 号：TG174.4[金属学及工艺—金属表面处理]