{"id":3746,"date":"2026-09-21T18:44:10","date_gmt":"2026-09-21T16:44:10","guid":{"rendered":"https:\/\/www.aurolia.de\/?page_id=3746"},"modified":"2026-09-23T10:41:44","modified_gmt":"2026-09-23T08:41:44","slug":"verfahren-aluminium-passivieren","status":"publish","type":"page","link":"https:\/\/www.aurolia.de\/en\/verfahren-aluminium-passivieren\/","title":{"rendered":"Verfahren Passivieren von Aluminium"},"content":{"rendered":"

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Processes<\/h3>\n

Surface finishing processes for different requirements<\/h2>\n

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\nAurolia offers a range of processes for the targeted finishing of technical surfaces. Depending on the material, component and application, properties such as corrosion protection, wear resistance, electrical conductivity, dimensional accuracy and appearance can be specifically influenced. The functional requirements of your component determine which surface treatment is best suited to your application.
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\n Our Processes at a Glance <\/div>\n\n \n\n \n \n\n \n\n \"Hard\n\n <\/span>\n\n \n\n \n Hard Anodizing <\/span>\n\n <\/span>\n\n <\/a>\n\n \n \n\n \n\n \"Anodizing\n\n <\/span>\n\n \n\n \n Anodizing <\/span>\n\n <\/span>\n\n <\/a>\n\n \n \n\n \n\n \"Electroless\n\n <\/span>\n\n \n\n \n Electroless Nickel Plating <\/span>\n\n <\/span>\n\n <\/a>\n\n \n \n\n \n\n \"Aluminum\n\n <\/span>\n\n \n\n \n Aluminum Passivation <\/span>\n\n <\/span>\n\n <\/a>\n\n \n \n\n \n\n \"Tin\n\n <\/span>\n\n \n\n \n Tin Plating <\/span>\n\n <\/span>\n\n <\/a>\n\n \n \n\n \n\n \"Silver\n\n <\/span>\n\n \n\n \n Silver Plating <\/span>\n\n <\/span>\n\n <\/a>\n\n \n \n\n \n\n \"Further\n\n <\/span>\n\n \n\n \n Further Processing <\/span>\n\n <\/span>\n\n <\/a>\n\n \n <\/nav>\n\n <\/div>\n\n <\/section>\n\n [\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

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Passivation of Aluminium<\/h1>\n

Corrosion protection meets electrical conductivity<\/h2>\n

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Description<\/h2>\n

Aluminium passivation<\/strong> is a chemical conversion process used to protect aluminium surfaces against corrosion without significantly altering the specific properties of the base material.<\/p>\n

Unlike anodising or hard anodising, passivation does not create a thick, electrically insulating oxide layer. Instead, the aluminium surface is provided with a very thin, transparent protective conversion layer.<\/p>\n

The key advantage is that the electrical conductivity of the surface is largely retained while the corrosion resistance of the aluminium is significantly improved.<\/p>\n

Aluminium passivation is therefore particularly suitable for technical components where electrical contact, EMC properties, equipotential bonding or very tight dimensional tolerances are important.<\/p>\n

At Aurolia, aluminium passivation is chromium(VI)-free and RoHS-compliant. The process therefore combines functional corrosion protection with the requirements of modern and sustainable industrial applications.<\/p>\n

The process becomes particularly interesting when different properties are required within a single component. For example, anodised or hard-anodised areas can be combined with specifically passivated surfaces. This makes it possible to combine wear- or corrosion-resistant areas with electrically conductive contact surfaces on the same component.
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Key facts<\/h2>\n

Our aluminium passivation offers:<\/p>\n

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  • chromium(VI)-free passivation<\/li>\n
  • RoHS-compliant surface treatment<\/li>\n
  • high corrosion protection for aluminium components<\/li>\n
  • retention of electrical conductivity<\/li>\n
  • very thin and virtually dimensionally neutral conversion layer<\/li>\n
  • transparent or largely colour-neutral surface<\/li>\n
  • suitable for components with tight dimensional and fitting tolerances<\/li>\n
  • ideal for electrical contact surfaces and equipotential bonding<\/li>\n
  • suitable for EMC-relevant applications<\/li>\n
  • partial passivation of defined functional areas possible<\/li>\n
  • can be combined with anodised and hard-anodised surfaces<\/li>\n
  • suitable for complex technical aluminium components<\/li>\n<\/ul>\n

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    \nDo you have specific requirements for corrosion protection, conductivity or dimensional accuracy?<\/strong><\/p>\n

    We will be happy to work with you to determine the appropriate surface solution for your component.
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    Typical applications<\/h2>\n

    Aluminium passivation is used wherever corrosion protection needs to be combined with functional electrical properties.<\/p>\n

    Typical applications include mechanical and plant engineering, electronics and electrical engineering, automotive and vehicle technology, defence applications, heat sinks and electronic housings, measurement and sensor technology, as well as technically demanding precision components.<\/p>\n

    Passivation offers particular advantages for components with contact surfaces, ground connections or EMC requirements compared with electrically insulating surface treatments.
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    FAQ \u2013 Aluminium Passivation<\/h2>\n

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