Corrosion protection for reduced maintenance

  • The primary purpose of corrosion protection is to protect the substrate from damage and degradation by oxidation. The main driver for this is asset protection and reduced maintenance
  • The most common substrate is mild steel used for construction
  • Current state of the art coatings are based on epoxy resin technology and are very effective with well-established track records
  • The most challenging in-service conditions are continuous/intermittent seawater immersion, particularly where cathodic protection systems are employed to control corrosion
  • Introduction of alternative technologies to epoxy will be a challenge but could be an opportunity
  • Ultimate performance would be effective corrosion prevention throughout the lifetime of the asset to be protected (25 years in the case of some marine vessels)
  • In addition to corrosion prevention, some degree of abrasion resistance is a desirable attribute
  • Surface tolerance is a desirable feature in order to improve ease of maintenance and repair, and reduce costs
  • The ability to apply and use anticorrosive primers at low temperatures (-5°C and below) can provide a benefit to customers
  • Current technology is medium to high solids (60-80% volume) and the general trend is towards higher solids or solvent free. This presents a challenge to maintain acceptable drying times and workable pot life at low temperatures
  • Extensive over-coating (maximum overcoat window) and breadth of topcoat type acceptance would be a benefit for customers in terms of flexibility of working practices

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