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杨效田,李秀倩,魏亨利,李文生.WC对定向结构Ni60涂层耐蚀性能的影响研究[J].稀有金属材料与工程(英文),2020,49(10):3604~3611.[yangxiaotian,Li Xiuqian,Wei Hengli and Li Wensheng.Effect of WC on corrosion resistance of directional structure Ni60 coating[J].Rare Metal Materials and Engineering,2020,49(10):3604~3611.]
Effect of WC on corrosion resistance of directional structure Ni60 coating
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Received:November 11, 2019  Revised:January 19, 2020
Key words: nickel-based alloy  WC particles  directional structure  composite coatings  corrosion resistance
Foundation item:国家自然科学基金资助(项目号51365024);浙江省自然科学基金资助(项目号LGG19E010003);
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yangxiaotian,Li Xiuqian,Wei Hengli and Li Wensheng  
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      In order to study the influence of WC content on the corrosion resistance of Ni60 alloy coating and the related mechanism, WC with the different mass fraction was added to Ni60 self-fused alloy powder, Ni60/WC directional structure composite coatings with different WC contents were prepared on 45 steel by induction remelting and forced cooling technology. The corrosion resistance and mechanism of WC particles reinforced Ni60 alloy directional structure composite coatings were investigated by SEM, EDS, XRD, electrochemical test and immersion corrosion. Results showed that the polarization resistance of composite coatings increased first and then decreased with the increase of WC, and the maximum polarization resistance reached 9710.8 Ω when the WC addition amount was 10%. The corrosion current density of composite coatings decreased first and then increased, and the minimum current density reached 1.34×10-6 A/cm2 with 10% WC content. The WC content had the important effect on microstructures, element distribution, phases of composite coatings, and further affected the corrosion resistance.