| 多弧离子镀(Ti,Cr)N镀层耐蚀性研究 |
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| 引用本文： | 郭巧琴,李建平,郭永春,杨忠.多弧离子镀(Ti,Cr)N镀层耐蚀性研究[J].电镀与精饰,2017,39(8). |
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| 作者姓名： | 郭巧琴 李建平 郭永春 杨忠 |
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| 作者单位： | 西安工业大学材料与化工学院,陕西西安,710032 |
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| 基金项目： | 陕西省重大科技成果转化专项，陕西省自然科学基础研究计划项目 |
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| 摘 要： | 采用多弧离子镀技术在高速钢表面制备了(Ti,Cr)N镀层,通过电化学工作站对镀层的塔菲尔曲线进行测试,分析镀层的耐腐蚀性,并采用质量变化法对电化学测试结果进行了验证。利用扫描电子显微镜观察了(Ti,Cr)N镀层腐蚀前后的微观形貌。结果表明,随电流比例ICr/ITi的增大,(Ti,Cr)N镀层表面晶粒尺寸逐渐减小。当ICr/ITi为90 A/60 A时,基体的自腐蚀电位由-0.750 V正移至-0.534 V,基体的腐蚀速率降低85.67%,耐蚀性提高。基体的腐蚀主要为点蚀和均匀腐蚀,(Ti,Cr)N镀层主要为小孔腐蚀。
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| 关 键 词： | 多弧离子镀 (Ti Cr)N镀层 耐蚀性 自腐蚀电位 |
Research of Corrosion Resistance of (Ti,Cr)N Coatings Deposited by Multi-arc Ion Plating |
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| GUO Qiaoqin,Li Jianping,GUO Yongchun,YANG Zhong.Research of Corrosion Resistance of (Ti,Cr)N Coatings Deposited by Multi-arc Ion Plating[J].Plating & Finishing,2017,39(8). |
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| Authors: | GUO Qiaoqin Li Jianping GUO Yongchun YANG Zhong |
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| Abstract: | (Ti,Cr)N coatings were prepared on the surface of high speed steel by multi-arc ion plating technology.The Tafel polarization curve of coating was tested by electrochemical workstation to analyze its corrosion resistance.The method of mass-changing was utilized to verify the electrochemical measurement results.The microstructure of (Ti,Cr)N coating before and after corrosion was observed by SEM.The results showed that the grain size of the coating surface gradually decreased with the increasing of ICr/ITi.When ICr/ITi was 90 A/60 A,the self-corrosion potential positively shifted from-0.705 V to-0.534 V,the corrosion rate of the substrate decreased by 85.67％ and the corrosion resistance was improved.The corrosion mechanism of matrix was mainly pitting and uniform corrosion,while (T i,Cr)N coatings was mainly pitting corrosion. |
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| Keywords: | multi-arc ion plating (Ti Cr) N coating corrosion resistance self-corrosion potential |
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