Offshore wind foundations

Long-life corrosion protection for monopiles, jackets and transition pieces in splash zone and atmospheric exposure.

CorrosivityISO 12944 C5-M to CX

Typical service life20–25+ years

Offshore wind structures combine three of the hardest conditions a coating system can face: permanent salt-laden atmosphere, mechanical load and flexing, and an inspection window that may only open once every few years. A coating failure is not a maintenance item — it is a vessel campaign.

The system therefore has to be specified for a defined target life, not for a colour and a thickness. That means a zinc-based primer for cathodic protection, an MIO or high-build epoxy intermediate for barrier and UV performance, and a topcoat chosen for colour retention and low surface energy in a marine atmosphere.

Recommended coating system

Layer	Type & DFT	Product examples
Primer	Zinc-rich epoxy, 60–80 µm DFT	Zinc-rich epoxy primers
Intermediate	High-build MIO epoxy, 120–160 µm DFT	MIO epoxy / high-build epoxy
Topcoat	Polyurethane or polysiloxane, 60–80 µm DFT	Aliphatic PU / polysiloxane
Total	240–320 µm DFT for C5-M; higher for splash zone	According to ISO 12944-5

Application critical points

The splash zone is not an atmospheric exposure — it needs its own, thicker specification and often a glass-flake or elastomeric solution rather than a standard atmospheric system.
Edges, cut-outs and welds must be stripe coated before each full coat. On offshore structures, edge corrosion is the most common visible failure.
Plan the surface preparation grade and the maximum exposure time together with the fabrication schedule; a primer that times out in storage is a common and expensive problem.
Where a low-friction or low-drag topcoat is required, confirm compatibility with the intermediate coat at the specification stage, not in the yard.

Related product categories

Zinc-Rich Primers · 157 Intermediates & MIO · 49 Topcoats · 198

Related products from the brands used in this scenario

Barrier 65 SInterdur 8803179CEHardtop M WFIntercure 384510Futura ASInterH2O 699

Related brands & products

JOTUN AkzoNobel International HEMPEL

Articles are compiled by RichTech from publicly available manufacturer materials and field practice, for selection reference only; the latest official technical data sheets (TDS) prevail.

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