Electroplating

06

Electroplating

Galvanic tinning

Electropolishing stainless steel

Passivating stainless steel

Special applications

Metal finishing & contract electroplating

Your service provider for surface coatings

Thanks to our many years of experience in the field of surface treatment and surface coating, we are the ideal service provider in the field of contract electroplating. We focus particularly on the individual requirements of our customers. When selecting the surface treatment, we take into account the intended use, corrosion protection, function and decorative appearance. Using special process technologies, we guarantee optimum surface finishing of components in rack or drum processes, even for partial coatings and geometrically complex parts.

We treat the surfaces of parts according to customer requirements for various applications and industries:

Automotive industry | Medical technology | Jewellery and watch industry | PCB industry | Equipment and systems engineering

PROCEDURE

Surface coating of steel parts and non-ferrous metals

We specialize in the galvanic surface coating of parts and components. The supplied components can be surface-treated as follows:

Pre-cleaning | Degreasing
Pickling
Pre-cleaning – stripping & activating
Galvanizing
Galvanic tinning
Passivation
Post-treatment Passivation / chromating
Electropolishing
Chemical deburring & polishing

OUR SERVICES

We process several materials

Our focus

in the area of surface finishing

Pre-treatment

Pre-cleaning - degreasing

If metal workpieces are electroplated after shaping, they must be clean and free of grease. Contamination, such as oil and grease, acts as a separating agent between the base material and the coating. For this reason, workpieces contaminated with oil and grease are first degreased and cleaned in our electroplating facility using:
 
  • Ultrasonic cleaning
  • Electrolytic degreasing

Pickling and activating

Decapitation is immersion in an acid solution to remove thin layers of tarnish and to activate metallic surfaces. Decapitation is used after degreasing surfaces in alkaline solutions to neutralize them.
Before placing workpieces in an electrolyte, especially after a previous pre-treatment, an immersion process in an acidic solution is usually carried out. Decapitation is intended to facilitate the removal of alkaline electrolyte residues, prepare the surface for the subsequent process and, above all, remove passive and oxide films.

Pickling

Chemical and anodic pickling process for removing tarnish, scale and other surface impurities.

 

Materials:

  • Stainless steel
  • Carbon steel
  • Copper and
  • Copper alloys
  • Titanium and
  • Titanium alloys

COATINGS

Electroplated zinc

Galvanic zinc coatings are used as a corrosion protection layer on ferrous materials. The metal is characterised by good environmental and biological compatibility and high cost-effectiveness. The coating can be applied to large parts that are individually fixed during the process as well as to small mass parts (bulk goods) that are processed in baskets or drums. The usual layer thicknesses range from approximately 5 μm to up to 30 μm.

Galvanic tin

Electroplated tin and tin coatings are used due to their good corrosion resistance, solderability and self-lubricating properties, which are required for bearings. The usual layer thicknesses of the coatings are between around 0.5 μm and up to 30 μm.

AFTERCARE

Passivation / Chromating

The basic tendency of galvanized steel surfaces to white corrosion can be significantly reduced by chromating. It is an essential post-treatment step in the galvanizing process. In addition to the original yellow chromating, we offer blue. Olive and black chromating as further coating systems. In addition to corrosion protection, these coatings also have a decorative effect.
The layer thicknesses of the chromates are between 0.1 and a maximum of 2 μm. They are also very suitable as adhesion promoters for post-treatment with paints or plastic coatings.

ELECTROPOLISHING

Electropolishing stainless steel

Electrochemical process for surface ablation on
metals. The surfaces are polished, cleaned and deburred.

Materials:

  • Stainless steel
  • Titanium alloys (titanium, Nitinol...)
  • Carbon steel 
  • Copper alloys

Electropolishing titanium | Titanium alloys

Electrochemical process for surface ablation on
metals. The surfaces are polished, cleaned and deburred.

Materials:

  • Titanium / Titanium alloys

Chemical deburring and polishing

Chemical process for surface removal on metals and is used for controlled chemical deburring and smoothing of the surface. For processing, the parts are immersed in the process bath loosely in baskets, drums or individually on racks.


Materials:

  • Carbon steel
  • Copper alloys
  • Titanium alloys

Passivation

Chemical production of a protective layer on a metallic material which prevents or significantly slows down the corrosion of the base material.

Stainless steel

Passivation of stainless steel surfaces chemically creates a passive layer to improve the corrosion resistance of the material. Recommended for components that are subject to high chemical stress after pickling or electropolishing.

Copper alloys

Copper and copper alloys have the natural property of oxidizing on contact with air and moisture. These surfaces can be protected against corrosion (tarnishing) with a special tarnish protection.

Rack electroplating & barrel electroplating

Processing of parts and components

Bulk goods

Depending on the geometry, the bulk material is
Various drum units are surface-treated. 

Rack goods

Depending on their geometry, the workpieces are processed on a contact frame.

Technical data

Galvanizing and passivating

Procedure:
Galvanized according to DIN 50979 Formation of passivation layers

Coating color:
Blue (transparent; CrVI-free) | Black | Olive | Yellow

Protective property:
Improvement of corrosion protection and for
Increasing the surface hardness of the parts

System technology:
Frame

Usable rack bath size:
2000 x 350 x 750 mm
700 x 500 x 1100 mm
Rohre:
max. 500 x 1100 mm

Drum

Small parts with a maximum capacity of 30 kg
max. 30 kg

Galvanic tinning

Procedure:

Tin coatings on ferrous materials and copper materials according to DIN 50965 - Cu/Sn

Coating color:

white (matt)

Protective property:
Improvement of corrosion protection and for
Increasing the surface hardness of the parts

System technology:
Frame

Usable rack bath size:
Max. Frame size: 450 x 400 mm

Degreasing of components

Electrolytic degreasing of steel parts, non-ferrous metals and stainless steel

Special solutions

Surface coating of small parts and small series on request
  • Pickling, etching, anodizing of titanium and titanium alloys
  • Electrochemical polishing and deburring (electropolishing) of titanium, titanium alloys and stainless steel
  • Chemical polishing and deburring of stainless steel
  • Passivation
  • Various chemical surface treatments (e.g. pickling, etching)
  • Various electrochemical surfaces (decorative and functional)
  • Various electroless surface treatments (e.g. chemical Ni/Au, chemical Sn)

OUR SERVICES

Alles aus einer Hand!

We offer all our services in our own electroplating facility. We only use our own equipment for this. This enables us to achieve the highest quality for your products and respond to your individual requirements.

Our processes

Color anodizing type III

Medical parts or components made of titanium or titanium alloys are electrochemically anodized with special aqueous electrolytes. The result is a thin, firmly adhering titanium oxide layer that appears colored due to the superimposition of light waves (interference). The color palette of type III anodized surfaces ranges from titanium grey, blue, yellow, magenta to green. The main purpose of anodizing medical parts and components is to improve identification and corrosion protection. The titanium oxide layer has very good electrical insulation and biocompatibility

Color spectrum
Blue
Mint
Yellow
Magenta
Green
Before
After
Grey anodizing type II

In addition to colour anodizing, grey anodizing (acidic or alkaline) can also be carried out in the systems. Type II grey anodizing is preferably used for bone plates, bone screws and bone implants. The process produces even thicker coatings and serves to improve corrosion and wear resistance.

Electropolishing

Electrochemical polishing (electropolishing) and deburring of stainless steel significantly improves the properties of the metallic surface, which has a positive effect on the durability of the individual components. Electropolishing is an electrochemical process for surface removal. The removal is carried out with special aqueous solutions using electricity in the micro range and produces a smooth and shiny surface.

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Tanja Lemmen

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