Technical Guidance

Life Expectancy

Marine Environment

All our exterior durable coatings are suitable for the marine environment, therefore choose the product based on the gloss and colour fastness you require - ultradurable polyesters will retain their gloss and colour longer than our high durable or standard durable systems. However, owing to high salinity and high humidity, the marine environment is a very aggressive one for corrosion. ISO 12944-2:1998 classifies these areas as 'C5M'.

Corrosion resistance will depend on the choice of metal substrate, its preparation, and the number of layers of powder coatings applied. Below are a selection of suggested coating systems with their expected lifetime. Please note that 'expected lifetime' is an indication of foreseen useful life, taken from the ISO 12944.  It is not a warranty or guarantee period.  Regular maintenance of coated materials will maximise durability

Mild Steel - Medium (5-15 years) Durability

Chemical Preparation

  • Remove sharp edges
  • Iron phosphate with final rinse process
  • Polyester edge-covering technology 60-70 microns

Physical Preparation

  • Remove oils
  • Remove sharp edges
  • Grit blast to a minimum cleanliness of Sa2.5 and a roughness of Rz = 40-60 microns
  • Epoxy Polyester NZP Primer 60-70 microns
  • Standard, high, or ultra-durable polyester topcoat 60-70 microns

Mild Steel - High (15+ years) Durability

Physical Preparation

  • Remove oils
  • Remove sharp edges
  • Grit blast to a minimum cleanliness of Sa2.5 and a roughness of Rz = 40-60 microns
  • Epozinc 1000 Primer 60-70 microns
  • Eposeal Primer 60-70 microns
  • Standard, high, or ultra-durable polyester topcoat 60-70 microns

Hot Dip Galvanised Steel - High (15+ years) Durability

Chemical Preparation

  • Linish sharp edges
  • Zinc Phosphate chemical process
  • Eposeal Primer 60-70 microns
  • Standard, high, or ultra-durable polyester topcoat 60-70 microns

Physical Preparation

  • Linish sharp edges
  • Sweep blast with a non-ferrous medium
  • Eposeal Primer 60-70 microns
  • Standard, high, or ultra-durable polyester topcoat 60-70 microns
NEED A CUSTOM POWDER COATING COLOUR OR FINISH?

We can make any powder coating colour or finish to order so get in touch to discuss your requirements.

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