If you live less than 20 km from the sea, your metal structures age 2 to 5 times faster than inland. Here's why — and how to effectively remedy it.
The invisible enemy: sea salt
Sea air contains suspended salt (chloride) particles, invisible to the naked eye. They settle on metal surfaces and greatly accelerate electrochemical corrosion: this is saline corrosion.
It is particularly aggressive because it attacks metal even without visible water — ambient humidity is enough.
The most affected areas by the sea
- Gates and fences exposed to sea winds.
- Balcony and terrace railings facing the sea.
- Metal frameworks of coastal constructions.
- Unsheltered outdoor equipment.
What it changes for protection
In coastal areas, an ordinary paint is not enough: salt penetrates under the film and triggers corrosion from underneath — hence the typical blistering and flaking found by the sea.
GALVACYL® zinc resists this mechanism because it does not act as a simple barrier: it electrochemically neutralizes saline attack (cathodic protection). This is what makes it a particularly suitable solution for coastal environments.
How to properly protect by the sea
- Brush carefully to remove surface salt and rust.
- Rinse and dry: by the sea, residual salt is the number one enemy of adhesion.
- Apply two coats of GALVACYL® — exposure to sea spray justifies the extra thickness.
- Plan an annual visual inspection to touch up at the first signs.
Anticipated maintenance frequency
In coastal areas: annual visual inspection, touch-up every 5 years for direct exposure to sea spray, and every 8 to 10 years for sheltered areas. More details: how long does zinc corrosion protection last?
FAQ
Is a special product needed for the seaside?
A zinc-rich coating like GALVACYL® is suitable; the essential thing is to apply two coats and maintain regularly.
My gate is already rusted by salt, what should I do?
It can be treated without disassembling it: see how to repair a rusted gate.
In summary
By the sea, salt accelerates corrosion and defeats ordinary paints. GALVACYL® cold galvanizing (+95% zinc, cathodic protection) is a suitable solution, provided two coats are applied and maintained regularly. See also our complete guide to protecting your steel from rust.
