CN111809151A - 一种用于黄铜、锌合金基材的镀膜工艺 - Google Patents

一种用于黄铜、锌合金基材的镀膜工艺 Download PDF

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CN111809151A
CN111809151A CN202010580974.7A CN202010580974A CN111809151A CN 111809151 A CN111809151 A CN 111809151A CN 202010580974 A CN202010580974 A CN 202010580974A CN 111809151 A CN111809151 A CN 111809151A
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coating
brass
base material
zinc alloy
organic silicon
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钟保民
曹伯兴
王晓娇
曾德朝
方定全
白其昌
方胜
文观华
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Foshan Dongpeng Ceramic Co Ltd
Foshan Dongpeng Ceramic Development Co Ltd
Guangdong Dongpeng Holdings Co Ltd
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Foshan Dongpeng Ceramic Co Ltd
Foshan Dongpeng Ceramic Development Co Ltd
Guangdong Dongpeng Holdings Co Ltd
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Abstract

本发明公开了一种用于黄铜、锌合金基材的镀膜工艺,黄铜、锌合金基材的表面为光亮表面,包括以下步骤:步骤1、对基材的表面进行清洗,除去基材的表面的灰尘及油污,然后烘干;步骤2、对基材预热,然后在基材的表面喷涂有机硅底漆,并固化;步骤3、将基材放置于镀膜箱内真空镀膜,真空镀膜的方式为多弧离子镀膜或磁控溅射镀膜;镀膜完成后,将基材从镀膜箱中取出;步骤4、在基材的镀膜的表面喷涂有机硅面漆或无痕水性烤漆,并固化。本发明可以使多弧离子镀膜及磁控溅射镀膜可以应用于黄铜及锌合金材质的产品,且有机硅面漆具有更高的硬度及耐腐蚀性能,可以对镀膜及产品起到保护作用。

Description

一种用于黄铜、锌合金基材的镀膜工艺
技术领域
本发明涉及卫浴装饰技术领域,尤其涉及一种用于黄铜、锌合金基材的镀膜工艺。
背景技术
随着社会的发展,人们对于卫浴五金件的外观工艺越来越高,目前现有的水龙头都会在其表面电镀一层装饰层,水电镀工艺的过程是:电解除油—酸活化—镀碱铜—清洗—镀酸铜(硫酸铜)—清洗—镀镍(两次)—清洗—镀铬,由于水电镀工艺中往往需要进行很多次除油、酸洗的过程,并且需要进行多种不同的电解液的不断更换,才能有效通过电解的作用使镀液中欲镀金属的阳离子在基体金属表面沉积出来,形成结构稳定的镀层,因此存在水污染等环境污染十分严重,且环保压力巨大的问题,并且由传统的水电镀或是烤漆等的装饰工艺获得的水龙头的装饰色彩单一,装饰的色系范围有限,水龙头装饰的设计素材和空间有限,水龙头的装饰工艺受到较大的限制。
因此,部分厂家开始采用真空镀膜的工艺对水龙头等卫浴五金件进行镀膜,真空镀膜包括真空蒸镀、多弧离子镀膜与磁控溅射镀膜,真空蒸镀由于镀膜的附着力差且异形件的镀膜均匀性较差,因此,真空蒸镀膜的工艺的局限性较大;而多弧离子镀膜与磁控溅射镀膜由于镀膜的附着力较强且表面效果较好而备受欢迎,目前,只有不锈钢材质的水龙头可直接进行多弧离子镀膜,从而制备多种金属色的水龙头产品;在目前的应用中,黄铜、锌合金材质的水龙头无法直接采用多弧离子镀膜工艺在其表面镀膜,若直接镀膜则存在表层镀层附着差,光泽暗无金属光亮的问题,目前的工艺是先对黄铜、锌合金材质的水龙头进行水电镀,然后再进行多弧离子镀膜,从而获得所需的产品,不仅工艺复杂,且污染极大。
发明内容
本发明的目的在于提出一种用于黄铜、锌合金基材的镀膜工艺,以解决上述问题。
为达此目的,本发明采用以下技术方案:
一种用于黄铜、锌合金基材的镀膜工艺,黄铜、锌合金基材的表面为光亮表面,包括以下步骤:
步骤1、对基材的表面进行清洗,除去基材的表面的灰尘及油污,然后烘干;
步骤2、对基材预热,然后在基材的表面喷涂有机硅底漆,并固化;
步骤3、将基材放置于镀膜箱内真空镀膜,真空镀膜的方式为多弧离子镀膜或磁控溅射镀膜;镀膜完成后,将基材从镀膜箱中取出;
步骤4、在基材的镀膜的表面喷涂有机硅面漆或无痕水性烤漆,并固化。
目前,在水龙头的生产中,通常需要在其表面电镀或真空蒸镀一层保护膜,由于电镀的过程十分复杂,且污染较大,因此,越来越多的厂家开始采用真空蒸镀的方式在水龙头的表面镀膜,真空蒸镀是通过加热蒸发某种物质使其沉积在固体表面,因此也称为蒸发镀膜。蒸发镀膜具有较高的沉积速率,可镀制单质和不易热分解的化合物膜;但是蒸发镀膜存在附着力差和异形件镀膜不均匀的问题,蒸发镀膜的工艺也开始逐渐被淘汰。本发明采用多弧离子镀膜或磁控溅射镀膜的方式对黄铜或锌合金材质的水龙头进行镀膜,需要指出的是多弧离子镀膜或磁控溅射镀膜在原理及应用范围上与蒸发镀膜存在较大差异,在目前的应用中,多弧离子镀膜或磁控溅射镀膜只可直接应用于不锈钢基材的表面,对于黄铜和锌合金材质的基材,若直接应用多弧离子镀膜或磁控溅射镀膜则会存在镀层附着力差和金属光泽不足的问题。
本发明的方法可应用于表面光亮的黄铜或锌合金基材,在基材的表面预先喷涂一层有机硅底漆,有机硅底漆为环氧树脂改性有机硅树脂漆,有机硅底漆在固化后在基材的表面形成坚硬、耐腐蚀的保护膜,从而替代传统工艺中的水电镀层,由于有机硅底漆具有较强的附着力,因此,在喷涂有机硅底漆前无需对基材进行喷砂或打磨处理,因此工艺更加简单,生产效率更高;有机硅底漆是由Si原子和O原子交替排列构成的稳定骨架,侧链通过Si原子与有机基(比如甲基、苯基、乙烯基、环氧基等)相连;有机硅底漆在固化后所形成保护膜可以作为过渡层,可以轻易地在其表面附着镀膜的金属离子,对有机硅底漆的表面进行多弧离子镀膜或磁控溅射镀膜不仅使得镀膜附着力较强,且具有较佳的金属光泽,从而实现在黄铜或锌合金基材的表面进行多弧离子镀膜,使得黄铜或锌合金基材的表面可以获得色彩多样,且具有金属光泽的装饰层;在镀膜的表面喷涂有机硅面漆,有机硅面漆在镀膜的表面形成坚硬、耐腐蚀的保护膜这样能够对镀膜起到保护作用。
其中,多弧离子镀膜是在真空条件下,应用气体放电实现镀膜的,即在真空室中使气体或蒸发物质电离,在气体离子或被蒸发物质离子的轰击下,同时将蒸发物或其反应产物蒸镀在基材上。多弧离子镀工艺综合了蒸发镀膜的高沉积速率与溅射镀膜的良好的膜层附着力的工艺的特点,并有很好的绕射性,可为形状复杂的工件镀膜。而磁控溅射镀膜是借助气体放电产生的正离子在电场的作用下高速轰击阴极靶材,使靶材中的原子或分子逃逸,并沉积到被镀基材的表面,从而制备出所需要的镀膜;采用本发明的方法对黄铜或锌合金基材的表面进行镀膜,不仅生产效率高,且膜层质量、膜层的均匀度都有极大的改善。
此外,透明的有机硅面漆或无痕水性烤漆可以通过光学作用来增加镀膜的表面光亮度,这是因为有机硅面漆或无痕水性烤漆具有较好的反射率,当光线照射到镀膜产品时,一部分光线穿过有机硅面漆或无痕水性烤漆折射到镀膜上,然后由镀膜反射出去,另一部分光线则由有机硅面漆或无痕水性烤漆的表面反射出去;因此,这样可以很好地增加镀膜产品的表面光亮度,且有机硅面漆或无痕水性烤漆可以在镀膜的外侧作为保护层,对镀膜起到保护作用,使镀膜不易被刮花或腐蚀。
所述有机硅底漆包括三甲氧基硅氧烷树脂30-50%、环氧树脂1-5%、异丙醇8-15%、钛白粉0-20%、重钙粉0-30%、流平剂1-5‰和助剂2-5%。
其中助剂为悬浮剂(膨润土)、表面润湿剂或分散剂中的一种或几种,有机硅底漆具有优异流平性能,可以可以在基材的表面形成一层光亮平整的、致密的、耐腐蚀的过渡层,使不能用于多弧离子镀膜和磁控溅射镀膜的基材可以应用于多弧离子镀膜和磁控溅射镀膜工艺,从而可以生产出不同材质的、多彩的和具有高金属光泽的水龙头产品。
按质量百分比计,所述有机硅面漆包括三甲氧基硅氧烷树脂50-60%,环氧树脂4-12%,异丙醇15-30%,流平剂1-10‰和助剂2-8%。
有机硅面漆的主要成份为三甲氧基硅氧烷树脂,该组份含量越高,所形成的有机硅涂层表面硬度等性能会提升,相反,改性物质,如醇酸树脂、聚酯树脂、环氧树脂、丙烯酸树脂、聚氨酯树脂等的质量分数越多,有机硅原有性能就会降低,比如耐热温度降低、表面硬度降低等。
按质量百分比计,所述无痕水性烤漆包括水性丙烯酸树50%-70%、去离子水25-45%和功能助剂2-8%。
有机硅面漆及无痕水性烤漆可以在镀膜的表面形成一层保护层,且有机硅面漆较为坚硬,且耐腐蚀性较好,因此可以极大地提高水龙头产品的防腐性能。
有机硅底漆与有机硅面漆均为环氧树脂改性有机硅树脂漆,环氧树脂改性有机硅树脂漆以Si-O键为主链结构,无双键存在,因此不易被此外光和臭氧分解,且聚硅氧烷类化合物是已知最无生物活性的化合物之一,因此,有机硅面漆的表面不易滋生细菌,且环氧树脂改性有机硅树脂漆的表面张力低,具有较佳的疏水性能,因此,使得有机硅面漆的表面不易残留水滴,水龙头的表面可以保持干燥、洁净。
在所述步骤3中,所述真空镀膜的过程中,向所述镀膜箱内通入氩气、乙炔、氮气、氧气中的一种或多种。
所述真空镀膜所采用的靶材包括但不限于铬或钛中的一种或两种。
采用不同的气体和靶材组合可以得到不同颜色的镀膜,如银色、黑色、金色、彩色、玫瑰金和枪黑等,气体与靶材的部分组合如表1所示:
表1-气体与靶材的组合与镀膜颜色的对应表
镀膜颜色 气体 靶材
银色 氩气
黑色 乙炔
金色 氮气
彩色 氧气
玫瑰金 氩气、氮气、乙炔 铬、钛
枪黑 乙炔、氮气
在所述步骤2中,在基材的表面喷涂有机硅底漆后,先常温下自流平干燥30min,然后将基材放置于80℃的环境中2h,再将温度升至150℃保温40min。
在所述步骤4中,在基材的镀膜的表面喷涂有机硅面漆或无痕水性烤漆后,先常温下自流平干燥30min,然后将基材放置于80℃的环境中2h,再将温度升至150℃保温40min。
在所述步骤3中,将基材放置于镀膜箱后,先将镀膜箱抽真空至5.0×10-3-2.0×10-2Pa,然后对基材进行真空镀膜,镀膜时间为3-15min。
在所述步骤2中,基材预热的温度为30-80℃。
基材在经过80~200℃预热后,使有机硅面漆与镀膜装饰层之间的附着力更好。
具体实施方式
下面结合具体实施方式来进一步说明本发明的技术方案。
实施例1-一种黄铜水龙头表面多弧离子镀银色膜的工艺,包括如下步骤:
步骤1、对黄铜水龙头的表面除尘,并通过超声波清洗除油,烘干;
步骤2、将黄铜水龙头预热至40℃,然后在黄铜水龙头的表面喷涂有机硅底漆,其中,有机硅底漆包括三甲氧基硅氧烷树脂35%、环氧树脂5%、异丙醇10%、钛白粉20%、重钙粉25%、流平剂1‰和助剂4.9%,然后常温下自流平干燥30min,再将黄铜水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅底漆固化于黄铜水龙头的表面;
步骤3、将黄铜水龙头与铬靶材分别放置于镀膜箱内真空镀膜,镀膜箱内抽真空至1.0×10-2Pa,然后对黄铜水龙头进行多弧离子镀膜,在镀膜的过程中镀膜箱中通入氩气;镀膜完成后,去除镀膜箱内的负压,然后将镀膜完成的黄铜水龙头从镀膜箱中取出;
步骤4、在黄铜水龙头的镀膜的表面喷涂有机硅面漆,其中,有机硅面漆包括三甲氧基硅氧烷树脂55%,环氧树脂10%,异丙醇30%,流平剂5‰和助剂4.5%,然后常温下自流平干燥30min,再将黄铜水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅面漆固化于镀层的表面;该黄铜水龙头的银色装饰层的银色效果相比于电镀或真空蒸镀的方法相比,其金属光泽更强,镀层更加均匀。
实施例2-一种黄铜水龙头表面多弧离子镀金色膜的工艺,包括如下步骤:
步骤1、对黄铜水龙头的表面除尘,并通过超声波清洗除油,烘干;
步骤2、将黄铜水龙头预热至60℃,然后在黄铜水龙头的表面喷涂有机硅底漆,其中,有机硅底漆包括三甲氧基硅氧烷树脂40%、环氧树脂5%、异丙醇12%、钛白粉10%、重钙粉28%、流平剂5‰和助剂4.5%,然后常温下自流平干燥30min,再将黄铜水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅底漆固化于黄铜水龙头的表面;
步骤3、将黄铜水龙头与钛靶材分别放置于镀膜箱内真空镀膜,镀膜箱内抽真空至8.0×10-3Pa,然后对黄铜水龙头进行多弧离子镀膜,在镀膜的过程中镀膜箱中通入氮气;镀膜完成后,去除镀膜箱内的负压,然后将镀膜完成的黄铜水龙头从镀膜箱中取出;
步骤4、在黄铜水龙头的镀膜的表面喷涂有机硅面漆,其中,有机硅面漆包括三甲氧基硅氧烷树脂60%,环氧树脂5%,异丙醇26%,流平剂10‰和助剂8%,然后常温下自流平干燥30min,再将黄铜水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅面漆固化于镀层的表面;该黄铜水龙头的金色装饰层的金色效果相比于电镀或真空蒸镀的方法相比,其金属光泽更强,镀层更加均匀。
实施例3-一种锌合金水龙头表面多弧离子镀黑色膜的工艺,包括如下步骤:
步骤1、对锌合金水龙头的表面除尘,并通过超声波清洗除油,烘干;
步骤2、将锌合金水龙头预热至80℃,然后在锌合金水龙头的表面喷涂有机硅底漆,其中,有机硅底漆包括三甲氧基硅氧烷树脂50%、环氧树脂2%、异丙醇12%、钛白粉21%、重钙粉10%、流平剂5‰和助剂4.5%,然后常温下自流平干燥30min,再将锌合金水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅底漆固化于锌合金水龙头的表面;
步骤3、将锌合金水龙头与铬靶材分别放置于镀膜箱内真空镀膜,镀膜箱内抽真空至1.0×10-2Pa,然后对锌合金水龙头进行多弧离子镀膜,在镀膜的过程中镀膜箱中通入乙炔;镀膜完成后,去除镀膜箱内的负压,然后将镀膜完成的锌合金水龙头从镀膜箱中取出;
步骤4、在锌合金水龙头的镀膜的表面喷涂有机硅面漆,其中,有机硅面漆包括三甲氧基硅氧烷树脂50%,环氧树脂12%,异丙醇30%,流平剂5‰和助剂7.5%,然后常温下自流平干燥30min,再将锌合金水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅面漆固化于镀层的表面;该锌合金水龙头的黑色装饰层的黑色效果相比于电镀或真空蒸镀的方法相比,其金属光泽更强,镀层更加均匀。
实施例4-一种锌合金水龙头表面磁控溅射镀玫瑰金色膜的工艺,包括如下步骤:
步骤1、对锌合金水龙头的表面除尘,并通过超声波清洗除油,烘干;
步骤2、将锌合金水龙头预热至80℃,然后在锌合金水龙头的表面喷涂有机硅底漆,其中,有机硅底漆包括三甲氧基硅氧烷树脂50%、环氧树脂2%、异丙醇12%、钛白粉21%、重钙粉10%、流平剂5‰和助剂4.5%,然后常温下自流平干燥30min,再将锌合金水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅底漆固化于锌合金水龙头的表面;
步骤3、将锌合金水龙头以及铬和钛靶材分别放置于镀膜箱内真空镀膜,镀膜箱内抽真空至5.0×10-3Pa,然后对锌合金水龙头进行磁控溅射镀膜,在镀膜的过程中镀膜箱中通入氩气、氮气及乙炔;镀膜完成后,去除镀膜箱内的负压,然后将镀膜完成的锌合金水龙头从镀膜箱中取出;
步骤4、在锌合金水龙头的镀膜的表面喷涂有机硅面漆,其中,有机硅面漆包括三甲氧基硅氧烷树脂50%,环氧树脂12%,异丙醇30%,流平剂5‰和助剂7.5%,然后常温下自流平干燥30min,再将锌合金水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅面漆固化于镀层的表面;该锌合金水龙头的玫瑰金色装饰层的玫瑰金色效果相比于电镀或真空蒸镀的方法相比,其金属光泽更强,镀层更加均匀。
实施例5-一种黄铜水龙头表面多弧离子镀银色膜的工艺,包括如下步骤:
步骤1、对黄铜水龙头的表面除尘,并通过超声波清洗除油,烘干;
步骤2、将黄铜水龙头预热至40℃,然后在黄铜水龙头的表面喷涂有机硅底漆,其中,有机硅底漆包括三甲氧基硅氧烷树脂35%、环氧树脂5%、异丙醇10%、钛白粉20%、重钙粉25%、流平剂1‰和助剂4.9%,然后常温下自流平干燥30min,再将黄铜水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅底漆固化于黄铜水龙头的表面;
步骤3、将黄铜水龙头与铬靶材分别放置于镀膜箱内真空镀膜,镀膜箱内抽真空至1.0×10-2Pa,然后对黄铜水龙头进行多弧离子镀膜,在镀膜的过程中镀膜箱中通入氩气;镀膜完成后,去除镀膜箱内的负压,然后将镀膜完成的黄铜水龙头从镀膜箱中取出;
步骤4、在黄铜水龙头的镀膜的表面喷涂无痕水性烤漆,其中,无痕水性烤漆包括水性丙烯酸树60%、去离子水35%和功能助剂5%,然后常温下自流平干燥30min,再将黄铜水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅面漆固化于镀层的表面;该黄铜水龙头的银色装饰层的银色效果相比于电镀或真空蒸镀的方法相比,其金属光泽更强,镀层更加均匀。
实施例6-一种黄铜水龙头表面多弧离子镀银色膜的工艺,包括如下步骤:
步骤1、对黄铜水龙头的表面除尘,并通过超声波清洗除油,烘干;
步骤2、将黄铜水龙头预热至40℃,然后在黄铜水龙头的表面喷涂有机硅底漆,其中,有机硅底漆包括三甲氧基硅氧烷树脂35%、环氧树脂5%、异丙醇10%、钛白粉20%、重钙粉25%、流平剂1‰和助剂4.9%,然后常温下自流平干燥30min,再将黄铜水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅底漆固化于黄铜水龙头的表面;
步骤3、将黄铜水龙头与铬靶材分别放置于镀膜箱内真空镀膜,镀膜箱内抽真空至1.0×10-2Pa,然后对黄铜水龙头进行多弧离子镀膜,在镀膜的过程中镀膜箱中通入氩气;镀膜完成后,去除镀膜箱内的负压,然后将镀膜完成的黄铜水龙头从镀膜箱中取出;
步骤4、在黄铜水龙头的镀膜的表面喷涂无痕水性烤漆,其中,无痕水性烤漆包括水性丙烯酸树50%、去离子水43%和功能助剂7%,然后常温下自流平干燥30min,再将黄铜水龙头放置于80℃的环境中2h,接着将温度升至150℃保温40min,使有机硅面漆固化于镀层的表面;该黄铜水龙头的银色装饰层的银色效果相比于电镀或真空蒸镀的方法相比,其金属光泽更强,镀层更加均匀。
对比例1
以实施例1的黄铜水龙头表面多弧离子镀银色膜的工艺为基础,取消步骤2和4,其余的工艺步骤及参数条件与实施例1相同,获得具有银色镀膜装饰的黄铜水龙头2,其表面的银色效果较为暗淡,金属光泽较差。
对比例2
以实施例1的黄铜水龙头表面多弧离子镀银色膜的工艺为基础,取消步骤2,其余的工艺步骤及参数条件与实施例1相同,获得具有银色镀膜装饰的黄铜水龙头3,其表面的银色效果较为暗淡,金属光泽较差。
对比例3
以实施例1的黄铜水龙头表面多弧离子镀银色膜的工艺为基础,将步骤4中的有机硅面漆的配方替换为:按质量份计,有机硅改性环氧树脂乳液40份、功能化改性石墨烯10份、粒径为5μm的碳酸钙10份、消泡剂0.8份,流平剂0.8份,水性催干剂0.5份、润湿剂2份、固化剂15份、去离子水40份;其余的工艺步骤及参数条件与实施例1相同,获得具有银色镀膜装饰的黄铜水龙头4,其金属光泽较强,镀层均匀。
对比例4
以实施例1的黄铜水龙头表面多弧离子镀银色膜的工艺为基础,取消步骤4,其余的工艺步骤及参数条件与实施例1相同,获得具有银色镀膜装饰的黄铜水龙头4,其金属光泽较强,镀层均匀。
对实施例1-6以及对比例1-4的产品分别进行性能测试,其结果如下表:
表2-产品性能测试结果
Figure BDA0002553163650000111
Figure BDA0002553163650000121
由上述实验结果可知,在黄铜及锌合金的表面涂布有机硅底漆可以提高其多弧离子镀膜和磁控溅射镀膜的金属光泽度,使多弧离子镀膜及磁控溅射镀膜可以应用于黄铜及锌合金材质的产品,另外,在镀膜的表面喷涂有机硅面漆可以对镀膜及产品起到保护作用,本发明所采用的有机硅面漆配方可具有更高的硬度及耐腐蚀性能。
以上的检测项目的检测方法及标准如下表所示:
Figure BDA0002553163650000122
Figure BDA0002553163650000131
以上结合具体实施例描述了本发明的技术原理。这些描述只是为了解释本发明的原理,而不能以任何方式解释为对本发明保护范围的限制。基于此处的解释,本领域的技术人员不需要付出创造性的劳动即可联想到本发明的其它具体实施方式,这些等同的变型或替换均包含在本申请权利要求所限定的范围内。

Claims (10)

1.一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:黄铜、锌合金基材的表面为光亮表面,包括以下步骤:
步骤1、对基材的表面进行清洗,除去基材的表面的灰尘及油污,然后烘干;
步骤2、对基材预热,然后在基材的表面喷涂有机硅底漆,并固化;
步骤3、将基材放置于镀膜箱内真空镀膜,真空镀膜的方式为多弧离子镀膜或磁控溅射镀膜;镀膜完成后,将基材从镀膜箱中取出;
步骤4、在基材的镀膜的表面喷涂有机硅面漆或无痕水性烤漆,并固化。
2.根据权利要求1所述的一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:所述有机硅底漆包括三甲氧基硅氧烷树脂30-50%、环氧树脂1-5%、异丙醇8-15%、钛白粉0-20%、重钙粉0-30%、流平剂1-5‰和助剂2-5%。
3.根据权利要求1所述的一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:按质量百分比计,所述有机硅面漆包括三甲氧基硅氧烷树脂50-60%,环氧树脂4-12%,异丙醇15-30%,流平剂1-10‰和助剂2-8%。
4.根据权利要求1所述的一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:按质量百分比计,所述无痕水性烤漆包括水性丙烯酸树50%-70%、去离子水25-45%和功能助剂2-8%。
5.根据权利要求1所述的一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:在所述步骤3中,所述真空镀膜的过程中,向所述镀膜箱内通入氩气、乙炔、氮气、氧气中的一种或多种。
6.根据权利要求5所述的一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:所述真空镀膜所采用的靶材包括但不限于铬或钛中的一种或两种。
7.根据权利要求1所述的一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:在所述步骤2中,在基材的表面喷涂有机硅底漆后,先常温下自流平干燥30min,然后将基材放置于80℃的环境中2h,再将温度升至150℃保温40min。
8.根据权利要求1所述的一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:在所述步骤4中,在基材的镀膜的表面喷涂有机硅面漆或无痕水性烤漆后,先常温下自流平干燥30min,然后将基材放置于80℃的环境中2h,再将温度升至150℃保温40min。
9.根据权利要求1所述的一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:在所述步骤3中,将基材放置于镀膜箱后,先将镀膜箱抽真空至5.0×10-3-2.0×10-2Pa,然后对基材进行真空镀膜,镀膜时间为3-15min。
10.根据权利要求1所述的一种用于黄铜、锌合金基材的镀膜工艺,其特征在于:在所述步骤2中,基材预热的温度为30-80℃。
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