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With a newly developed, in-house process for electroplating aluminium, HDO Druckguß- und Oberflächentechnik GmbH expands its surface treatment portfolio to include a sophisticated technology that has so far been mastered by only a few. In addition to zinc, steel, stainless steel, and brass, we can now electroplate aluminium reliably, reproducibly, and in true series production quality—opening up new possibilities in design, functionality, and durability.
Aluminium impresses with its outstanding ratio of weight, strength, and design freedom—but presents considerable challenges when it comes to electroplating, particularly in terms of process control, dimensional accuracy, and layer structure.
Typical challenges:
Using a specially developed, highly effective pretreatment process, we create ideal conditions for electroplating aluminium surfaces in our fully automated production facility. This enables aluminium to be electroplated reliably, reproducibly, and in series production quality.
Your benefits:
When component manufacturing, machining, and surface treatment are considered as one integrated process, interfaces are reduced—and quality becomes more predictable.
Your advantages at a glance:
In addition to handling the entire process from aluminium die casting to the finished electroplated component, we also offer aluminium electroplating as a standalone service (contract electroplating) for customer-supplied parts. Feel free to contact us—we will find the right solution for your project as well.
In electroplating, a workpiece is coated with a thin metal layer using an electric current. The workpiece acts as a cathode (negatively charged) and is immersed in an electrolyte bath containing metal ions of the desired plating material. Typically, an anode made of the same metal serves as the positively charged counter-electrode. The metal ions are deposited from the electrolyte in the form of a solid metal layer on the workpiece. The same amount of metal is dissolved at the anode so that the concentration of dissolved metal in the electrolyte remains constant. The result is a uniform metallic coating with decorative and protective properties.
As part of an integrated aluminium surface treatment strategy, different processes can be used depending on specific requirements. These range from coatings such as electroplated nickel, copper, or zinc, to decorative variants like chrome plating or components plated with gold or silver.
Aluminium poses a particular challenge: its oxidation forms a dense aluminium oxide layer that acts as a barrier and influences the surface structure. This is precisely why a carefully coordinated pretreatment is essential in electroplating, in order to prevent corrosion and adhesion problems.
Depending on the application, alternative surface processes are also available for aluminium. Common aluminium surface treatments include anodizing (eloxal) and powder or wet paint coating. Anodizing creates an electrically non-conductive oxide layer with decorative possibilities, for example through coloring. Powder or wet coating provides a colored protective layer based on polymers.
Electroplating deliberately takes a different technical approach: instead of an oxide or polymer layer, it creates a true metallic surface. This offers specific functional advantages such as electrical conductivity, wear and chemical resistance, solderability or contact capability, as well as a high-quality metallic appearance.
As such, electroplating aluminium represents an attractive and high-performance alternative to conventional processes such as anodizing or powder coating—especially when functional requirements go beyond mere corrosion protection or when a metallic surface is deliberately desired.
For series and precision components, electroplating offers economical solutions with high process reliability and great freedom in both function and design.
When electroplating aluminium, a metal layer is deposited onto the aluminium surface using an electrochemical process to enhance the component functionally and/or decoratively. HDO Druckguß- und Oberflächentechnik GmbH achieves series-production quality using an in-house pretreatment process specifically developed to address the unique characteristics of aluminium surfaces.
The most common causes are the instantly forming non-conductive oxide layer, unsuitable pretreatment, and alloy-dependent reactions that can lead to adhesion problems. HDO Druckguß- und Oberflächentechnik GmbH addresses these challenges with a coordinated process chain and fully automated production technology.
Depending on the alloy, geometry, and target surface, a wide range of components may be suitable. In addition to aluminium die cast parts, HDO Druckguß- und Oberflächentechnik GmbH electroplates components manufactured using common primary and forming aluminium processes, such as profiles or sheets. For many applications, this represents an attractive alternative or complement to anodizing when a metallic functional or design surface is required. Customers wishing to have electroplated aluminium thus receive an economical solution for demanding series components.
Depending on the coating system, electroplating aluminium enables a combination of premium appearance, defined functionality (e.g., wear protection), and stable reproducibility in series production. When combined with an integrated process chain, HDO Druckguß- und Oberflächentechnik GmbH can also reduce interfaces and ensure quality across all production stages.
The best approach is to initiate a technical inquiry, including information about the target surface, operating conditions, tolerances, as well as details on the alloy and component geometry. HDO Druckguß- und Oberflächentechnik GmbH will assess feasibility and processes and recommend the optimal path—from initial sampling through to series production.
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