金属元素对WC-Al_(2)O_(3)复合材料在NaCl溶液中腐蚀行为的影响研究  

Effect of Metal Elements on Corrosion Behavior of WC-Al_(2)O_(3)Composite in NaCl Solution

作　　者：韩彬 董威威[2,3] 骆祎岚[2] 朱世根[2,3] HAN Bin;DONG Wei-wei;LUO Yi-lan;ZHU Shi-gen(School of Intelligent Manufacturing and Control Engineering,Shanghai Polytechnic University,Shanghai 201209,China;College of Mechanical Engineering,Donghua University,Shanghai 201620,China;Engineering Research Center of Advanced Textile Machinery of the Ministry of Education,Donghua University,Shanghai 201620,China)

机构地区：[1]上海第二工业大学智能制造与控制工程学院,上海201209 [2]东华大学机械工程学院,上海201620 [3]东华大学纺织装备教育部工程研究中心,上海201620

出　　处：《稀有金属与硬质合金》2022年第6期33-40,共8页Rare Metals and Cemented Carbides

摘　　要：采用真空热压烧结(HPS)法制备了WC-Al_(2)O_(3)复合材料。用电化学腐蚀法开展了金属元素(Cr、Mo、Ti)对WC-Al_(2)O_(3)复合材料在NaCl溶液中腐蚀行为的影响研究,主要测定了开路电位、极化曲线和阻抗谱。实验结果表明,Cr和Mo添加剂都能够提高WC-Al_(2)O_(3)复合材料的耐腐蚀性能,其中Cr添加剂对腐蚀性能的增强效果明显优于Mo添加剂,而Ti添加剂则会降低WC-Al_(2)O_(3)复合材料的耐腐蚀性能。分析认为,含Cr复合材料在腐蚀介质中可形成更加完整和致密的氧化膜,从而有效降低复合材料的腐蚀速率。WC-Al_(2)O_(3)composite was prepared by vacuum hot pressing sintering(HPS)method.The effect of metal elements(Cr,Mo,Ti)on the corrosion behavior of WC-Al_(2)O_(3)composite in NaCl solution was studied by electrochemical corrosion method,and open circuit potential,electric polarization curve and electrochemical impedance spectroscopy were mainly measured.The experimental results show that Cr and Mo additives can improve the corrosion resistance of WC-Al_(2)O_(3)composite,and the enhancement effect of Cr additive is significantly better than that of Mo additive while Ti additive reduces the corrosion resistance of WC-Al_(2)O_(3)composite.Based on analysis,oxide film formed on the surface of the Cr-containing composite in the corrosive medium is more complete and denser,thereby effectively reducing the corrosion rate of the composite.

关 键 词：WC-Al_(2)O_(3)复合材料 腐蚀行为 NACL溶液 电化学腐蚀 吸氧腐蚀 

分 类 号：TF11.31[冶金工程—冶金物理化学]