Powder coated steel / Powder coated aluminium

Materiali metalco web-03



Galvanization on steel

For coated steel products, Metalco alternatively uses three galvanizing systems:

  • Hot-dip galvanizing
  • Sendzimir galvanization
  • Cold galvanization

Metalco selects, each time, the galvanizing system most suitable for the thickness and/or shape and/or manufacturing process of each article.

Coating on steel and aluminium

    1. Preparation (sandblasting automatic or manual sanding)
    2. Alkaline degreasing
    3. Rinsing with water system
    4. Rinsing with demineralized water
    5. Passivation film-forming
    6. Drying with hot air 160°C
    7. Application of epoxy primer zinc*
    8. Polymerization in the oven 185°C*
    9. Cooling*
    10. Application of electrostatic pure powder polyester
    11. Polymerization in the oven 185°C
    12. Cooling
    13. Final test

(*) only on request and/or on cast iron components

Warning: Please remember that not all steel coated products are recommended for placing in areas where there is salty air (e.g. near the sea) or heavy air pollution. Metalco recommends asking for TRIPLEX treatment, which needs the application of zinc primer before coating. This treatment improves the corrosion resistance of coated steel. The treatment is subject to additional charge. Please contact the Metalco Sales Office for more information or advice.

Wrinkled finish (with different levels of embossing).

Metalco uses paints P.P. wrinkled matt effect as standard. Only on request and with price surcharge, products can be coated with a glossy finish.
The reproduction of colours in the brochure are not a true RAL match. To compare the relative RAL colours use a commercial RAL card.


Sablé finish (subject to price surcharge).



Painted surfaces which become scratched can be restored, by using the colour touch-up sprays. 400ml cans of Metalco’s standard RAL are available upon request. The colour should be sprayed from a distance of 10-20 cm onto the surface which has been previously cleaned from dust and dirt. Drying is achieved in about 15 minutes. For colours not included in our standard chart, touch-up liquid colour can be requested. If however, on steel products, damage is deep and breaks the zinc protective coating below the paint, it will be necessary to proceed with an application of a zinc spray between the phase of cleaning and repainting. Metalco can, upon request, provide an aerosol for retouching the zinc coating.
The reproduction of colours in the brochure are not a true RAL match. To compare the relative RAL colours use a commercial RAL card.
In case of any doubt about the proper maintenance procedure, please contact the Metalco office for advice.

General requirements applicable to all Metalco’s products in any material

Upon receipt of the goods, where it is not possible to place and/or install them within a few days, they must always be removed from plastic (nylon) packaging to allow ventilation and prevent the formation of condensation that can irreparably damage the product. Particularly, the packaging should always be removed immediately if it is not possible to keep the goods in a covered place protected from sunlight.