PREPARATION & PROTECTION

Shot-blasting is more commonly known as sand-blasting, and consists in continuously projecting small balls of steel at very high speed onto the surfaces requiring treatment.

Shot-blasting is used to prepare the surface for painting, by removing all signs of rust, carbon deposits, machining faults and grease – and creates the roughness required for better adherence of the future coating, whether liquid or powder.

This operation is defined by the ISO standard 8504/2/2000, which classifies the treated substrate according to 3 quality levels: Dsa 2, Dsa 2.5 and Dsa 3 according to the type of paint coating applied afterwards, and to the guarantees in place.

Metal plating through spray-applied zinc consists in melting the wire-form metal and spraying it using a flame spray gun (thermal spraying).

The zinc acts as a screen to block out external aggressive agents.

Thanks to its electro-chemical properties, the zinc impedes the steel’s oxidation process.

Advantages:

  1. Improved lifespan.
  2. Efficient protection against corrosion, and very rare maintenance work.
  3. Can be used on all types of metal structures, namely those required to withstand particularly aggressive atmospheres.
  4. Seals off any damage in the case of an impact or damage done to the coating, without any risk of the corrosion progressive further.
  5. Excellent support for paint coating.

Metal plating is standardised according to the following standards:

NF EN ISO 2063-2 – October 2017: Thermal spraying – Zinc, aluminium and their alloys – Part 2: execution of corrosion protection systems – Thermal spraying – Metallic and inorganic coatings – Zinc, aluminium and their alloys