How to Choose the Best Coating to Protect a Container from Rust and Corrosion
Shipping and storage containers are often exposed to humidity, temperature fluctuations, and mechanical damage. To ensure a container serves for years and maintains its quality, it’s important to choose the right anti-corrosion coating. In this article, we explain the main types of coatings and how to select the best one for your needs.
Why Is Corrosion Protection So Important?
Containers are made of steel, which is highly susceptible to rust without proper protection. This is especially critical for:
containers near the sea;
humid or coastal climates;
long-term outdoor storage.
Rust affects not only appearance, but also structural strength. That means risks to both your cargo and the container’s resale value.
Main Types of Coatings for Containers
1. Epoxy Coating
One of the most popular choices. Provides excellent resistance to moisture, salt, and chemicals. Usually applied in two layers - primer and topcoat.
2. Polyurethane Coating
Offers high mechanical strength and UV protection. A great choice for containers exposed to constant sunlight.
3. Zinc-Rich Primer
Provides corrosion protection through sacrificial action - zinc corrodes instead of steel. Often used as a base before painting.
4. Bitumen Coating (for the bottom)
Ideal for the underside of the container. Resistant to moisture, gravel, and dirt. Not recommended for side or top surfaces.
5. Marine-Grade Paints
Special coatings developed for extreme maritime conditions: salt spray, constant moisture, and temperature shifts. Commonly used for container refurbishment.
How to Choose the Right Coating?
Consider the following factors:
Usage conditions: sea transport, warehouse, outdoor exposure.
Container type: dry cargo, reefer, specialized models.
Budget: higher-quality coatings may be more expensive, but offer long-term savings.
Resale plans: a container in good condition with fresh paint will have a higher market value.
Tips from Container Trade
When buying a new container, check the factory-applied coating - it's usually epoxy.
For a used container, evaluate the coating condition and consider repainting.
Use compatible materials when repainting - not all coatings bond well with old surfaces.
Looking for a container with anti-corrosion protection?
At Container Trade, we offer new and used shipping containers with coatings that meet international standards. We’ll help you choose the right option for your conditions and budget.
