Cromatura Moderna
Via Albert Einstein, 1
20010 San Giorgio su Legnano (MI)

Tel. 0331.401449
Fax. 0331.407941

Fill the form

Products catalogue

We operate in the fields of anodic oxidation and related colouring, electrolytic galvanisation, tin plating, chromate conversion of aluminium and zamak (zinc-aluminium-magnesium-copper) alloys, using recognised products such as ALODINE; these treatments are carried out in automated processing lines and their purpose is to provide high protection standard against atmospheric elements; they also give a uniform aesthetic appearance to the surfaces of the parts treated.

In addition, today, the chromate conversion of aluminium and zinc-aluminium-magnesium alloys is carried out in accordance with the latest regulations in effect (RoHS), avoiding the presence of hexavalent chromium both in the processing baths and on the surface of the parts treated.

Chromate conversion
Chromate and phosphate-chromate passivation are protections that prevent attack of the metal surface by atmospheric elements for a variable period of time, which is determined by the quality of the metal treated and of the treatment carried out.  The treatment does not change the material's surface electrical conductivity.
Today, both chromate and phosphate-chromate treatment can guarantee high levels of protection for the treated products.
Chromate or phosphate-chromate passivation forms a film on the surface of the part treated, without altering the metal's characteristics; in addition, it maintains the part's electrical conductivity unchanged over time and increases paint adhesion.
Our company performs these treatments in accordance with standards UNI 9921 and standards MIL C-5541E.

For additional information, please visit the Chromate conversion page or contact us if you have any questions.

Anodic oxidation
The treatment consists of forming an oxide layer on the surface of the part treated, through an electrolytic process.

This treatment generates a number of characteristics:
- Aesthetic appearance: an excellent effect of uniform colouration results when the treatment is performed on plates or drawn wires
- Electrical insulation: the treatment creates an electrical insulating barrier
- Hardness: the material's surface hardens; a hard oxidation treatment creates an oxide film even harder than that provided by traditional oxidation
- Colouring: this treatment can provide colouring by immersion in suitable colouring baths or by printing with absorption of inks. A further fixing stage ensures that the ink absorbed by the material is not released
- Atmospheric elements:  excellent resistance to salt fog; note that the beach loungers used on the beach undergo this treatment and remain in excellent condition for years.

For additional information, please visit the Anodic oxidation page or contact us if you have any questions.

Electrolytic galvanisation consists of placing the objects to be galvanised (carefully cleaned by mechanical brushing or by washing with alkaline solutions for degreasing and then with acidic solutions for pickling) as the cathode in an electrolytic bath. The items to be galvanised are placed on suitable frames and then immersed in the galvanising bath. Bars of the metal to be deposited, connected to the anode, and soluble salts of the metal to be deposited are placed in the bath (following some geometrical criteria).  When electrical power is applied, the positive ions of the metal to be deposited migrate to the cathode, where they lose their charge and are deposited in the form of a continuous metal layer. On the other hand, the metal dissolves at the anode, to generate dissolved ions, which replace those discharged at the cathode. The overall reaction is an oxidation-reduction reaction, resulting from the anodic oxidation of the metal which dissolves losing electrons and from the cathodic reduction of the ions that deposit in the form of metal, acquiring electrons. We can distinguish two important types of galvanisation, depending on the chemical composition of the galvanising baths.

For additional information, please visit the Galvanisation page or contact us if you have any questions.

Electrolytic tin plating
Tin plating can be used for products of various kinds and sectors, from food processing to the general mechanical industry.
The characteristics of this treatment are: the possibility to solder using tin solder, for which it is an excellent base; the ability to conduct electrical current, which makes it an excellent treatment for electrical contacts; its compatibility with food products and the fact that it can be used on products that come into contact with food and beverages.
The thickness of the treatment layer can vary between 2 and 30 microns, always guaranteeing excellent flexibility of the metal deposited on the part.
In some cases, the treatment is performed first and then followed by bending or shearing mechanical operations. This electrolytic treatment yields  a polished silver-coloured appearance.

For additional information, please visit the Electrolytic tin plating page or contact us if you have any questions.

This treatment is carried out with stainless steel grit; its purpose is to increase the roughness of the part treated, in order to improve paint adhesion.
To render uniform a surface that has an unpleasant appearance in order to improve the subsequent treatment; to render the surface matte in order to obtain a matte finish during the subsequent treatment.
Simply eliminate rust, paint, or grease residues form the part's surface.

For additional information, please visit the Sandblasting page or contact us if you have any questions.

It is a surface deposition for copper and bronze that provides a high degree of protection against corrosion; suitable for food contact use.
- Very high corrosion resistance
- Suitable for food contact according to NSF
- Surface hardness between that of nickel and that of chromium
- Homogeneous deposition on the part's surface
- Complies with Ministerial Decree of 21.03.1973 and subsequent amendments (determination of migration)

CM01 is an electrolytic deposition of polished metal appearance with pink reflections; it resists browning.
It can be alternated with Chromium for some decorative indoor and outdoor applications or for applications on electrical contacts.
It resists well to wear and retains an oil film that enhances this property. Due to the penetrating power of the baths and to the deposition's good conductivity, it is used in the metallisation of holes of printed circuits to partially replace gold.
The hardness of the deposit is between that of nickel and that of chromium.

For additional information, please visit the CM01 page or contact us if you have any questions.

You will find the details of all treatments and their characteristics in the menu on the side.