Applying the Right Armor


By J. Oriol Ossó, Hempel A/S

 courtesy of hempel a/s

When it comes to maintaining offshore assets, protecting against naturally corrosive environmental elements is an ongoing challenge. Stress-induced micro-cracking, water ingress through coating systems and mechanical damage significantly increase the risk of corrosion. This can make maintenance a complex and costly problem for asset owners — but it doesn’t have to be. 

Selecting a coating system that is specially formulated to meet the exact mechanical, operational and environmental needs of offshore assets can result in significant cost savings and efficiency.

Traditional three-coat systems used for offshore structures regularly show signs of early coating failure, leaving asset owners with unsustainable maintenance costs. To address this issue, worldwide coatings manufacturer Hempel recently launched a new high-performance water-repellent topcoat — Hempatop Repel 800. Hempatop Repel 800, combined with Hempadur Avantguard 770, is a two-coat system that is specifically designed for offshore maintenance and formulated to deliver a superior protective solution for offshore assets and structures.

How It Works

Hempatop Repel 800 actively repels water from the coated surface, delivering enhanced corrosion protection with fewer coating layers. This means that it can be applied faster and will last longer than conventional coating solutions, saving owners time and money on offshore maintenance.

For optimum protection, Hempatop Repel 800 is used in combination with Avantguard 770, an activated zinc primer containing Hempel’s patented Avantguard technology. The two coatings work together to create a robust anti-corrosive system.

Hempatop Repel 800 is the first volumetric water-repellent topcoat on the market, responding to the need for a specially formulated coating that provides an additional layer of armor for harsh offshore marine environments. In addition to its water-repellent properties, the product was developed specifically to deliver robust mechanical properties and be easy to apply. The result is improved flexibility and crack resistance (when used with Avantguard 770 as the first coat), compared with conventional coating systems.

Manual surface preparation plays a vital role in maintenance. By using Avantguard 770 as the primer, asset owners benefit from a coating solution that ensures excellent adhesion and reduced rust creep in maintenance situations. The primer also offers outstanding flexibility as well as impact and crack resistance not found in conventional zinc-rich primers.

Importantly, this two-coat system requires one coat less than standard protective coatings solutions for offshore installations and lasts significantly longer. This simplifies the maintenance processes of offshore assets, reduces costs for owners, and allows applicators to complete maintenance jobs faster.

The Hempatop Repel 800 system can be applied in a single day, significantly reducing the man-hours required for applicators offshore, while saving asset owners time and money. Designed to be easily applied with conventional or airless application equipment, this Repel 800/Avantguard 770 combination protects assets longer, reducing the frequency and cost of ongoing maintenance.

Hempatop Repel 800 at a glance

  • Superior long-lasting corrosion resistance
  • Easy application and short overcoating interval for increased productivity
  • Can be applied in a single day, reducing the time needed for applicators offshore
  • Simple and flexible coating system — one coat less than industry standard
  • Meets all the test requirements of ISO 12944:2018 Part 9 for a CX category
  • Prequalified for NORSOK M-501 Ed. 6, System 1
  • Excellent water-repellent properties, reducing water ingress through the topcoat
  • Proven adhesion retention and mechanical performance
  • Improved mechanical resistance even at high DFTs

Avantguard is a registered trademark of Hempel. 
Claims or positions expressed by sponsoring authors do not necessarily reflect the views of TPC, PaintSquare or its editors. 


J. Oriol Ossó, Hempel A/S

J. Oriol Ossó is head of Energy, responsible for the global energy product portfolio at Hempel A/S. He holds a Ph.D. in material sciences, obtained from his work with Max Planck in metals research and the Autonomous University of Barcelona. Ossó has over 12 years of experience in the chemical and coatings industry, having previously worked for international companies BASF and Air Products.




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