CN106835096A - 一种铝质压铸件的表面处理工艺 - Google Patents
一种铝质压铸件的表面处理工艺 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
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Abstract
本发明公开了一种可降低生产成本的铝质压铸件的表面处理工艺,其步骤为:将铝质压铸件依次经过机械打磨抛光、除硅、喷砂、去油、钝化、清洗和烘干,处理完成;在除硅过程中,采用了氢氟酸与硝酸混合而成的混合酸,所述的氢氟酸与硝酸按照1:3.5~4.5的体积比进行混合;在钝化过程中,采用了钝化膜处理剂,其制备方法为:按照质量百分比计,将65~73%的水、21~29%的硝酸和3.5~6.5%的重铬酸钾混合、形成混合液,然后,将该混合液加热至30‑40度,保持5‑10分钟。该表面处理工艺可广泛地应用于车辆和船舶上的铝质压铸件的表面处理。
Description
技术领域
本发明涉及到一种表面处理工艺,尤其涉及到一种铝质压铸件的表面处理工艺。
背景技术
业内人士都知道,在铝质压铸件成型之后,其表面通常会发黑,大大影响了其外观。在实际生产过程中,通常会对铝质压铸件进行电镀、喷漆,以达到改善其外观质量的目的;但是,增加了生产成本。
发明内容
本发明所要解决的技术问题是:提供一种可降低生产成本的铝质压铸件的表面处理工艺。
为解决上述技术问题,本发明采用了一种铝质压铸件的表面处理工艺,其步骤为:
将铝质压铸件依次经过机械打磨抛光、除硅、喷砂、去油、钝化、清洗和烘干,处理完成;
在所述除硅过程中,采用了氢氟酸与硝酸混合而成的混合酸,所述的氢氟酸与硝酸按照1:3.5~4.5的体积比进行混合;在所述的钝化过程中,采用了钝化膜处理剂,其制备方法为:按照质量百分比计,将65~73%的水、21~29%的硝酸和3.5~6.5%的重铬酸钾混合、形成混合液,然后,将该混合液加热至30-40度,保持5-10分钟。
作为一种优选方案,在所述的一种铝质压铸件的表面处理工艺中,所述钝化膜处理剂的制备方法为:按照质量百分比计,将68~73%的水、23~27%的硝酸和3.5~6.5%的重铬酸钾混合、形成混合液,然后,将该混合液加热至30-40度,保持7-10分钟。
本发明的有益效果是:本发明所述的表面处理工艺,完全可以替代传统的电镀、喷漆方法将铝质压铸件洗白和钝化,而且,该表面处理工艺与传统的电镀和喷漆的方法相比,大大节省了生产成本。
具体实施方式
下面结合实施例,详细描述本发明所述的一种铝质压铸件的表面处理工艺的具体实施方案。
实施例一:
本发明所述的一种铝质压铸件的表面处理工艺,其步骤为:将铝质压铸件依次经过机械打磨抛光之后,将其放入由氢氟酸与硝酸按照1:3.6的体积比混合而成的混合酸中进行除硅,然后依次经过喷砂和去油,再放入至钝化膜处理剂中进行钝化,钝化完成之后再经过清洗和烘干,处理完成。所述钝化膜处理剂的制备过程为:按照质量百分比计,将66%的水、28%的硝酸和6%的重铬酸钾混合、形成混合液,然后,将该混合液加热至33度,保持6分钟。
实施例二:
本发明所述的一种铝质压铸件的表面处理工艺,其步骤为:将铝质压铸件依次经过机械打磨抛光之后,将其放入由氢氟酸与硝酸按照1:4的体积比混合而成的混合酸中进行除硅,然后依次经过喷砂和去油,再放入至钝化膜处理剂中进行钝化,钝化完成之后再经过清洗和烘干,处理完成。所述钝化膜处理剂的制备过程为:按照质量百分比计,将70%的水、25%的硝酸和5%的重铬酸钾混合、形成混合液,然后,将该混合液加热至35度,保持7.5分钟。
实施例三:
本发明所述的一种铝质压铸件的表面处理工艺,其步骤为:将铝质压铸件依次经过机械打磨抛光之后,将其放入由氢氟酸与硝酸按照1:4.4的体积比混合而成的混合酸中进行除硅,然后依次经过喷砂和去油,再放入至钝化膜处理剂中进行钝化,钝化完成之后再经过清洗和烘干,处理完成。所述钝化膜处理剂的制备过程为:按照质量百分比计,将73%的水、23%的硝酸和4%的重铬酸钾混合、形成混合液,然后,将该混合液加热至38度,保持9分钟。
综上所述,仅为本发明的较佳实施例而已,并非用来限定本发明实施的范围,凡依本发明权利要求范围所述的形状、构造、特征及精神所作的均等变化与修饰,均应包括在本发明的权利要求范围内。
Claims (2)
1.一种铝质压铸件的表面处理工艺,其步骤为:
将铝质压铸件依次经过机械打磨抛光、除硅、喷砂、去油、钝化、清洗和烘干,处理完成;
在所述除硅过程中,采用了氢氟酸与硝酸混合而成的混合酸,所述的氢氟酸与硝酸按照1:3.5~4.5的体积比进行混合;在所述的钝化过程中,采用了钝化膜处理剂,其制备方法为:按照质量百分比计,将65~73%的水、21~29%的硝酸和3.5~6.5%的重铬酸钾混合、形成混合液,然后,将该混合液加热至30-40度,保持5-10分钟。
2.根据权利要求1所述的铝质压铸件的表面处理工艺,其特征在于:所述钝化膜处理剂的制备方法为:按照质量百分比计,将68~73%的水、23~27%的硝酸和3.5~6.5%的重铬酸钾混合、形成混合液,然后,将该混合液加热至30-40度,保持7-10分钟。
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Cited By (2)
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CN109609938A (zh) * | 2018-12-06 | 2019-04-12 | 苏州康索机电有限公司 | 一种铸件表面钝化的方法 |
CN110592566A (zh) * | 2019-09-03 | 2019-12-20 | 厦门建霖健康家居股份有限公司 | 一种不锈钢钝化剂及其钝化工艺 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109609938A (zh) * | 2018-12-06 | 2019-04-12 | 苏州康索机电有限公司 | 一种铸件表面钝化的方法 |
CN110592566A (zh) * | 2019-09-03 | 2019-12-20 | 厦门建霖健康家居股份有限公司 | 一种不锈钢钝化剂及其钝化工艺 |
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