Recommended Paints for Port and Harbor Applications

Port facilities are constantly exposed to harsh marine environments (high salinity, humidity, strong UV radiation, and mechanical wear), requiring paints with excellent corrosion resistance, abrasion resistance, and long-term durability. Below are the commonly used paint types and recommended solutions for port applications.

1. Primer (Corrosion Protection – Critical Layer)

Epoxy Zinc-Rich Primer

• Features: Zinc particles provide cathodic protection, excellent rust prevention, and strong adhesion.
• Applications: Steel structures, wharf piles, gates, and heavily corroded areas.
• Note: Must be used with intermediate and topcoats (prone to chalking if used alone).

Inorganic Zinc-Rich Primer

• Features: High-temperature resistance (up to 400°C), superior corrosion resistance, but requires strict surface preparation (blast cleaning to Sa2.5).
• Applications: High-temperature or highly corrosive areas (e.g., oil pipelines, ship unloader steel structures).

2. Intermediate Coat (Enhanced Protection)

Epoxy Mica Iron Oxide (MIO) Intermediate Coat

• Features: Mica flakes improve barrier properties, prevent moisture penetration, and compensate for primer deficiencies.
• Compatibility: Often used in combination with zinc-rich primer + polyurethane topcoat (a classic port protection system).

3. Topcoat (Weather Resistance & Aesthetics)

Polyurethane Topcoat

• Features: UV resistance, color retention, and excellent abrasion resistance. Suitable for port machinery, railings, etc.
• Recommended: Aliphatic polyurethane (e.g., acrylic polyurethane) for better anti-yellowing performance.

Fluorocarbon Topcoat

• Features: Extreme weather resistance (15+ years), self-cleaning properties, but higher cost.
• Applications: Landmark port structures or extreme climate zones.

Coal Tar Epoxy Paint

• Features: Waterproof, chemical-resistant, and cost-effective, but limited color options (usually black).
• Applications: Submerged piles, buried pipelines, and other concealed areas.

Recommended Paint Systems