European leader in surface treatment

We have been developing a wide range of strategic research areas for more than 60 years, which today enable us to support you in every aspect of your project.

Drawing on our extensive surface treatment expertise, we undertake to provide you with advice and deliver solutions that not only meet your specifications but also include any related requirements you may have (logistics, quality, environment, packaging, etc.)

Surface treatments qualified for the Defence industry.

For surface treatments, each specifier tends to develop their own requirements. Industries such as Defence and Aerospace tend to be the most demanding. In fact, Defence and Aerospace contractors cannot risk using subcontractors who cannot provide parts coatings specifically developed for their needs. This is why their subcontractors must meet qualifications.

Electropoli, a specialist in industrial paints, hot-dip galvanising, and chemical and electrolytic treatments, already holds the qualifications imposed by leaders in the Defence industry such as NEXTER, and MBDA. We are ready and able to adapt to your requirements as well.

What is Defence industry qualification?
In addition to the standards with which surface treatment specialists must comply, specifiers– particularly in the Defence and aerospace industries– may require their subcontractors to meet specific requirements to qualify to coat their parts.
This qualification stands as proof that, when a firm like Electropoli wins a contract, they will be able to treat the different parts in strict conformity with specifications.
To obtain this qualification, the subcontractor receives a Technical application file, and performs the required treatment on a series of test parts. If the results strictly conform to the Technical application file, and the Defence contractor is fully satisfied, then the surface treatment specialist is officially qualified for contracts.

Electropoli holds a number of major qualifications, and supports major defence contractors with tailored technical processes, such as powder and cataphoretic coatings.

Spot zinc nickel protection / Pad application

Spot zinc nickel protection applied with a pad Electropoli, the specialist in metal surface treatment, serves the Automotive, Aerospace and Defence industries, with spot coating for damaged, bulky or technical parts, using a pad. What is pad application? When should it be used? Explanations!

Purpose of spot pad application.

Certain industrial parts cannot be coated using standard electrolytic processes. This is the case, for example, with parts that cannot be fully emerged in an electrolytic bath because they are too bulky, or too heavy, and cannot be removed; or parts where only a small area needs to be protected. This method is also suitable for damaged parts that cannot be removed. Electropoli gives you a solution for coating such parts, with properties comparable to those you would get with dip treatment. The process consists in spot application of a metal electrolytic deposit (e.g. zinc, nickel, copper, zinc nickel) using a pad. Good to know: this process is effective for a new coating or a repair. Also, before starting pad application, the part or area to be repaired must first be cleaned and degreased.

How does pad application work?

The process consists in soaking a pad with an electrolytic solution containing metal particles to be deposited on the substrate. The pad constitutes the anode, and the part to be treated the cathode. A current is sent through the pad, causing the metal particles to migrate from the anode to the cathode, resulting in even coating. As with an Electropoli electrolytic bath, pad application has the following advantages:

  • perfect against corrosion
  • higher resistance
  • better mechanical properties
  • beautiful finishes

Electrolytic treatments, industrial paints, hot-dip galvanisation... Whatever your substrate, objective, or volume, Electropoli is by your side, with the right surface treatment for your needs.

Qualification for special processes for cataphoretic coating on magnesium

To meet the needs of the armament industry, Electropoli has developed a special process qualification AQPS_M_2015_106_00 for its cataphoretic treatment technique on magnesium. This treatment by electrophoresis, specific to our group, is performed at our site in Saumur in the Pays de la Loire.

What is cataphoresis on magnesium?
Cataphoresis is an industrial technique that involves depositing an electroplated paint on a metal substrate, thereby providing it with durable and complete protection against corrosion. It involves immersing the cathode-coated substrate in a water-soluble paint and then applying an electric current to it in order to cause the particles of paint in suspension to migrate uniformly on to the substrate: this paint is then cured by firing in order to obtain the final and functional coating.

A special process dedicated to cataphoresis treatment on magnesium
Although cataphoresis treatment is widespread for steel, cast iron or aluminium substrates, it is applied much more rarely to magnesium parts. Quite simply, because magnesium is a very difficult metal to coat. For that reason, Electropoli had to implement the special process AQPS_M_2015_106_00 in order to guarantee the conformity of this surface treatment technique for its customer that manufactures special boxes for the armament industry.

This success is proof that Electropoli is able to guarantee surface treatments on metals that are hard to coat, such as magnesium, but also to be responsive to the specific expectations of its customers.

You need to prepare metal parts for the automotive, aeronautical and armament industries… Whether it's industrial paints or electrolytic treatments, Electropoli will be able to put together a tailor-made solution for treating your substrates, regardless of their composition.

Electropoli’s patented hot dip galvanising

Hot dip galvanising is one of the many metal surface treatments developed by Electropoli. Electropoli’s exclusive technique – patent No. EP1793009A1 – provides long-lasting protection for steel substrates. What are the features of this hot-dip galvanising process? What are the advantages? Explanation!

What is hot-dip galvanising?
Hot-dip galvanising is a surface treatment that durably protects steel substrates via a chemical reaction. First, the steel parts are degreased and stripped. Next, they are dipped into a galvanic bath of molten zinc at 450°C.
After this treatment, the parts are evenly protected, inside and out. The advantage of hot-dip galvanising is that it produces a chemical reaction which makes the parts ultra-corrosion-resistant.

The advantages of Electropoli’s exclusive hot dip galvanising process– patent No. EP1793009A1
Electropoli uses a unique low-thickness galvanising method called GFE® – patent No. EP1793009A1. This hot-dip galvanising technique, specially developed by our teams, consists in applying a coat of zinc with a mean thickness of 50 to 60 µm.
The GFE® method produces galvanised steel parts:

  • - with a perfectly even finish
    - with greater hardness
    - that are extremely corrosion-resistant
    - that can be handled with no risk of scratching

Use the best hot-dip galvanising treatment for steel substrates. The GFE® method is right for all industries. Whatever your volumes, Electropoli will establish the best protocol to protect your parts using GFE®.