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 aluminum
- Preparation (sandblasting automatic or manual sanding)
- Alkaline degreasing
- Rinsing with water system
- Rinsing with demineralized water
- Passivation film-forming
- Drying with hot air 160°C
- Application of epoxy primer zinc*
- Polymerization in the oven 185°C*
- Application of electrostatic pure powder polyester
- Polymerization in the oven 185°C
- Final test
(*) only on request and/or on cast iron components
Warning: In the case of installation of coated steel products in areas with salty air (e.g. in the vicinity of the sea) or with heavy air pollution, Metalco recommends always to require TRIPLEX treatment, which involves the application of zinc primer before painting. This treatment improves the corrosion resistance of coated steel. The treatment is subject to surcharge.
Wrinkled finish (with different levels of embossing).
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 colors not included in our standard chart, touch-up liquid color 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 colors in the brochure are not a true RAL match. To compare the relative RAL colous use a commercial RAL card. In case of any doubt about the proper maintenance procedure, please contact the Metalco office for advice.