电刷镀Ni-ZrO2纳米复合镀层及其磨损腐蚀性能研究

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1、NANCHANGUNIVERSITY学士学位论文THESISOFBACHELOR（2011—2015年）题目电刷镀Ni-ZrO2纳米复合镀层及其磨损腐蚀性能研究摘要电刷镀Ni-ZrO2纳米复合镀层及其磨损腐蚀性能研究摘要纳米复合镀是20世纪90年代兴起的一种新型材料表面改性技术，它用纳米颗粒代替了普通复合镀中所使用的微米颗粒，是复合镀的发展趋势。本文采用纳米电刷镀技术在Q235基体表面镀覆Ni-ZrO2纳米复合镀层，重点对添加了不同浓度的ZrO2纳米颗粒镀层的性能进行分析。纳米电刷镀制备过程包括试验前预处理（

2、打磨、电净、活化）、镀打底层、镀复合镀层三步。在镀复合镀层阶段，控制反应温度50℃，pH值6，通过控制电量来控制镀层厚度。制备成功的镀层经洗净、烘干后进行检测。从镀层表面形貌、摩擦摩损性能和耐腐蚀性能三个方面重点研究在镀液中添加不同浓度ZrO2纳米颗粒对镀层性能的影响。试验表明，当添加的ZrO2纳米颗粒浓度较低时（0.5g/L-1.5g/L），试件的摩擦系数、磨损量和划痕宽度均保持在一个较小的范围内；当ZrO2纳米颗粒浓度较高（>2.0g/L）时，试件的摩擦系数、磨损量和划痕宽度明显增大。在耐腐蚀性能方面，采

3、用静态浸泡失重法测腐蚀量。试验表明，随着ZrO2纳米颗粒浓度的增加，其耐腐蚀性也不断提高。关键词：镍基复合镀层；纳米电刷镀；二氧化锆；耐磨损性能；耐腐蚀性能IAbstractResearchforWearingResistanceandCorrosionResistanceofNi-ZrO2Nano-compositeCoatingsPreparedbyBrushElectroplatingAbstractNano-compositeplating,whichoccurredinthe90sof20centu

4、ry,isanovelsurface-finishingmethodofmaterials,whereinmicroparticlesusedincompositeplatingweresubstitutedbynano-particles.Itisthetrendofcompositeplating.Weusethemethodofnano-compositebrushplatingcoatedwithNi-ZrO2nano-compositecoatingsonQ235substrateinthispap

5、er,andmainlyanalyzedNi-ZrO2nano-compositecoatings’performancewithdifferentZrO2content.Thepreparationfornano-compositecoatingsincludethreesteps,suchaspretreatment(polishing,electro-cleanandactivate),nickelpre-plateandpreparationofNi-ZrO2nano-compositecoating

6、s.Weshouldkeep50℃,pH=6andelectricquantitytocontrolthickness.AfterwepreparedNi-ZrO2nano-compositecoatingssuccessfully,weneedwashanddryit,thendetectit.WestudiedmajorinNi-ZrO2nano-compositecoatingswhichfromthreeaspectsincludesurfaceperformance,wearingresistanc

7、eandcorrosionresistancefromdifferentZrO2content.Andthat,westudiedwearingresistancealsofromthreeaspects,suchasfrictionfactor,wearingvalueandscratchwidth.Wefoundit’sgoodforcoatings’wearingresistancewhendensityofZrO2between0.5g/Land1.5g/L;it’sbadforcoatings’we

8、aringresistanceobviouslywhendensityofZrO2exceed2g/L.Andweresearchcorrosionresistancebythemethodofstaticimmersion.wefoundasdensityofZrO2increased,corrosionresistanceincreasedfollow.Keyword：nickelcomposi