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1、门铰链电镀仿金Cu-Zn合金工艺设计一、工艺设计说明书1摘要1.1中文摘要摘要:仿金镀层外观有纯金色、18K以及16K金色。目前国内外广泛应用的仿金镀层,一般采用铜锌合金的方法得到,主要有二元合金(70Cu-Zn,80Cu-Sn)与三元合金(Cu-Zn-Sn)。三元合金颜色光泽优良,应用最广。仿金镀层一般要求底层光亮,而仿金镀液不再添加光亮剂。为装饰用的仿金镀层较薄,一般在1~2um,,只要求在制品表面”着”上一层薄金黄色。这样薄的铜锌合金镀层耐蚀性极差。因此,镀层的耐蚀性主要靠电镀底层来解决,采
2、用镀厚铜打底,再度仿金镀层的方法,获得镀层易“泛红“。故生产中常采用镀亮镍层打底,这样既光亮又有一定硬度,而且表面的仿金层也不易发花。仿金电镀的镀液有氰化物型、氰化物—焦磷酸盐型、HEDP型和焦磷酸盐型。后两种无氰镀液组成复杂,分散能力不好,维护困难,应用少,氰化物型最稳定,较易控制,镀得的镀层色泽鲜艳、合格率高并可重复反修。以中、低氰镀液应用最广。电镀仿金层后,为防止变色,除进行适当的钝化处理外,还要涂上一层透明的有机膜。对于一些精巧产品,这层有机膜显得很不协调,因而可在仿金层上再镀一层金。由于
3、金镀层有良好的稳定性,产品不易变色,美观大方,很受欢迎。关键词:仿金镀层铜锌合金光亮剂HEDP型钝化分散能力有机膜31门铰链电镀仿金Cu-Zn合金工艺设计1.2英文摘要Abstract:Theappearanceofimitationgoldplatingwithpuregold,18K,and16Kgold.Imitationgoldplatingiswidelyusedathomeandabroad,generallyuseacopper-zincalloyobtainedbythemetho
4、d,therearebinaryalloys(70Cu-Zn,80Cu-Sn)andternaryalloys(Cu-Zn-Sn).Ternaryalloycolorglossisexcellent,themostwidelyused.Imitationgoldcoatinggenerallyrequiretheunderlyingbright,imitationgoldplatingbathisnolongeraddbrightener.Decoratedwithimitationgoldpla
5、tingisthin,generally1~2umrequiresonlythesurfaceoftheworkinprogress,""athinlayerofgoldenyellow.Thisthincopper-zincalloycorrosionresistanceispoor.Therefore,thecorrosionresistanceofthecoatingtosolvetheunderlyingbyplating,thickcopperplatingbaseagain,imita
6、tiongoldplating,coating"flushed".Ofproductionareoftenplatedbrightnickellayerofprimer,sothatbothlighthasacertainhardness,imitationgoldsurfacelayerisnoteasytoblur.Imitationgoldplatingofthebathofcyanideandcyanide-pyrophosphatetype,HEDPandpyrophosphatetyp
7、e.Thelattertwocyanideplatingbathcompositioniscomplex,poordispersioncapability,anddifficulttomaintain,lessapplicationcyanidetypeisthemoststableandeasiertocontrol,platedcoatingbrightcolor,highpassratecanrepeatantirevisionistthe.In,themostwidelyusedlow-c
8、yanideplatingbath.Electroplatingimitationgoldlayer,inordertopreventdiscoloration,andinadditiontotheappropriatepassivationtreatment,butalsocoatedwithalayeroftransparentorganicfilm.Fordelicateproducts,thislayeroforganicfilmlookverycoordinated,th