Metal Surfaces

Surface Characteristics

surface-characterstics-check (1)

  • Common characteristics and preparation practices exist across most metal types and can be referred to as a rule of thumb
  • Various metal types and process that make them have an impact on the performance of paint applied and therefore require specific treatments; these need to be adhered to where applicable

 

 

General Preparation

attention

Cleaning

  • Cleaning of surface contaminants including oils and grease is required and may be carried out using white spirit or other solvents
  • Structural metalwork in industrial or coastal environments are likely to be highly contaminated and thorough cleaning will be required
  • Cleaning techniques include: sandblasting, acid cleaning, flame cleaning, hand/mechanical cleaning and solvent cleaning

Corrosion

  • Especially applicable to iron and steel, where rust and scale need to be completely removed before priming and painting
  • While zinc and aluminium are more resistant to corrosion, they will also require specific treatment before priming and painting

Priming

  • Priming should be done by brush,
  • Priming should be done shortly after the above preparatory work has been done
  • Care should be taken to ensure that metal surface is 100% dry

 

New Iron and Steel, un-primed

unpainted-i-beamWhat is it?

  • Any un-primed metal

Treatment

  • Ensure that the surface is free of contaminants using the Preparation techniques above
  • Shortly afterwards, apply either Sparcolux Paints Red Etch Primer or Sparcolux Paints Zinc Chromate Primer

 

Iron and Steel, previously painted

painted-metal-surfaceWhat is it?

  • Any primed and painted metal

Treatment

  • Remove all poorly adhering or defective paint and primer
  • Prepare and prime as per the General Preparation practices
  • Shortly afterwards, apply either Sparcolux Paints Red Etch Primer or Sparcolux Paints Zinc Chromate Primer