浸镀铜前处理对铝合金表面Ni-P镀层结构与性能的影响
Effects of Cu Immersion Pretreatment on the Structure and Performance of Electroless Ni-P on Al Alloys
查看参考文献30篇
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文摘
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化学镀Ni-P是提高铝合金表面耐蚀耐磨性的主要方法之一,但施镀前通常要进行前处理,以去除表面氧化膜。以氯化胆碱-乙二醇低共熔体系为溶剂,CuCl_2·2H_2O为铜源,通过浸镀方法在铝合金表面制备铜层,再后续化学镀Ni-P,并与未经浸镀前处理和浸锌前处理铝合金表面的化学镀Ni-P层进行对比。利用扫描电子显微镜、X射线衍射、动电位极化及ASTM D3359-93胶带测试法研究了不同前处理方法对Ni-P镀层结构和性能的影响。结果表明:与未经浸镀前处理和浸锌前处理相比,通过浸镀铜前处理的铝合金表面得到的Ni-P镀层呈常规的胞状颗粒结构,腐蚀电位与腐蚀电流分别为-0.343V和2.109×10~(-6)A/cm~2,耐蚀性较好;根据ASTM D3359-93标准,镀层与基底的附着性为5B。 |
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其他语种文摘
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Electroless Ni-P is one of key methods to improve the corrosion and wear resistance of Al alloys.However,appropriate pretreatments are usually needed before electroless plating to eliminate oxide film of Ni-P coating.Cu layer was obtained by galvanic replacementfrom adeep eutectic solventcomprising a mixture of choline chloride and ethylene glycol with CuCl_2·2H_2O as copper source,and then electroless Ni-P coating was prepared.As a comparison,the Ni-P coatings were prepared on Al alloys without immersion and Zn immersion pretreatment.The effect of different pretreatments on the structure and properties was investigated by scanning electron microscopy,X-ray diffraction,potentiodynamic polarization and cross-cut tape tests according to ASTM D3359-93.The results show that the Ni-P coating with Cu pretreatment is characterized byhemispherical structure,and exhibits excellent corrosion resistance with a corrosion potential of-0.343V and a current density of 2.109×10~(-6) A/cm~2.According a to ASTM D3359-93,the adhesion quality forthe test result can be ranked as 5B. |
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来源
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中国表面工程
,2016,29(2):30-36 【核心库】
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DOI
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10.11933/j.issn.1007-9289.2016.02.005
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关键词
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铝合金
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化学镀Ni-P
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浸铜前处理
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低共熔溶剂
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地址
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中国科学院兰州化学物理研究所, 固体润滑国家重点实验室, 兰州, 730000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-9289 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金
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中国科学院“百人计划”项目
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文献收藏号
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CSCD:5690611
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