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revised: Customer process cladding in the Welding & Cutting sector

Cladding

Change of surface properties

PROCESS DESCRIPTION

The aim of coating construction components is to create surface properties that the base material does not have. Important characteristics include:

  • Corrosion resistance
  • Wear resistance
  • Thermal or electrical resistance or conductivity
  • Optical properties

Often it is metals that are coated. Here methods are used whose principles of operation are known from joining technology, such as:

  • Soldering
  • Electric arc welding
  • Shield gas welding,
  • Plasma-powder welding

For heat sensitive or non-metallic components special processes have been developed, such as:

  • Thermal spraying
  • Vacuum-coating
  • Electro- or immersion bath-galvanisation
  • Chrome plating

revised: Application technology cladding in the Welding & Cutting sector

Cladding

Change of surface properties

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Overview of the gases for welding

WELDING GASES

MAG, MIG, TIG and forming gases

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null R744 - Introduction - 2

Purity requirements for CO2 as a refrigerant R744

For industrial applications, CO2 as a refrigerant requires a very high level of purity to ensure efficiency and safety in the cooling process. When using CO2 as a refrigerant R744, purity is of paramount importance. Contamination with moisture or other gases, such as nitrogen, can significantly impair the functioning of the cooling circuit:

  • Moisture: Excessive moisture content in CO2 leads to the formation of carbonic acid, which causes corrosion in the cooling pipes and components.
  • Heavy metal contamination or nitrogen: These contaminants increase the condenser pressure and impair the efficiency of the system by disrupting the evaporation process.

For these reasons, a CO2 purity of 99.995 % (CO2 4.5) is recommended for use as a refrigerant R744. High purity not only ensures stable and safe operation, but also optimizes the efficiency of the refrigeration cycle.