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届本科毕业设计设计题目碳钢化学镀镍工艺研究学生姓名所在院系机电学院所学专业机电技术教育导师姓名完成时间摘要本文主要通过对聚甲基丙烯酸甲酯PMMA,俗称有机玻璃表面进行预处理去应力除油粗化敏化活化。去应力工艺使有机玻璃表面能均匀金属化，并且结合力良好，这里使用化学的方法进行去应力有机玻璃表面是疏水的，这使得在其表面进行化学处理发生困难。为了使后面的各项工序顺利进行，除油是必不可少的工序，它可使粗化过程得到最佳效果有机玻璃表面光滑,虽然经过前面的除油工序表面已无油污,但光滑的表面是无法得到结合力良好的镀层的，因此必须进行粗化处理,使表面失去原来的光泽,变成均匀细致的毛面敏化的目的是为了在非金属表面建立起以贵金属为核心的催化中心准备条件，因此敏化剂也还是还原剂在进行活化工艺时，考虑到活化方法的多样性，本实验采用多次试验的方法以选择最优方案。预处理后采用含稳定剂、缓冲剂及络合剂配合使用的低温酸性化学镀的方法,在有机玻璃表面得到镍镀层。该工艺具有沉积温度低60～70℃,镀速高,镀液稳定等特点。实验结果表明该镀层与基体结合力良好，耐磨性、耐蚀性良好。关键字有机玻璃,预处理,化学镀,镍镀层。AbstractInthispaper,mainlythroughthepolymethylmethacrylatePMMA,commonlyknownasplexiglasssurfacepretreatmenttostressremovalofcrudesensitizationactivation.Tostresstheplexiglasssurfaceofmetalcanbeuniform,andagoodcombinationofpower,wheretheuseofchemicalmethodstostressplexiglasssurfaceishydrophobic,whichmakesthesurfaceforchemicaltreatmentdifficult.Inordertomaketheprocessbehindthesmoothconductoftheoilremovalprocessisessential,itcanberoughprocessbestplexiglasssurfacesmooth,despitetheremovalprocessinfrontofthesurfacethereisnooilpollution,butthesmoothThesurfaceisunabletogetagoodcombinationofthecoating,andthereforetheneedforroughtreatment,thelossoftheoriginalshinysurface,auniformanddetailedhairsurfacesensitizationisaimedatnonmetallicsurfaceinordertoestablishapreciousmetalsasthecoreCentrepreparedbytheconditions,soreducingagentoragentshave,duringactivationprocess,takingintoaccounttheactivationofthediversityofways,thisexperimentusedseveralmethodstotesttheoptimalchoiceofprogrammes.Pretreatedwithastabilizingagent,bufferandcomplexingagentwiththeuseofthelowtemperatureacidicchemicalplatingmethods,intheplexiglasssurfacebynickel.Theprocesshasdepositedalowtemperature6070℃,platingrate,bathstabilityandsoon.Theresultsshowedthatthecoatingandsubstratecombinationofgoodwearresistance,corrosionresistancegood.Keywordplexiglass,pretreatment,chemicalplating,nickelcoating.目录1前言............................................................................................................................12化学镀镍的基本原理................................................................................................23试验材料和方法........................................................................................................33.1试验材料.........................................................................................................33.2试验方法.........................................................................................................33.2.1工艺流程..............................................................................................33.2.2化学镀镍镀液稳定性的测定..............................................................53.2.3化学镀镍的主要技术指标..................................................................63.2.4正交试验设计及评价依据..................................................................63.2.5化学镀镍溶液组成及配方..................................................................63.2.6试验步骤............................................................................................104试验结果与分析....................................................................................................114.1各工艺条件对化学镀层的影响...................................................................114.1.1镀液温度的影响................................................................................114.1.2pH值的影响.......................................................................................124.1.3施镀时间的影响................................................................................124.2正交试验结果与分析...................................................................................124.3镀层质量分析...............................................................................................165结论..........................................................................................................................16致谢..............................................................................................................................16参考文献......................................................................................................................17
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