Metal structures are known for their strength, durability, and longevity—but even steel is vulnerable to one of nature’s most persistent enemies: rust and corrosion. Left unchecked, corrosion can weaken metal, compromise structural integrity, and lead to costly repairs or replacements.
The good news? With the right strategies, you can significantly reduce the risk of rust and protect your investment for the long haul. Whether you’re building a steel barn, installing a metal roof, or working with custom-fabricated panels, these tips will help you keep corrosion at bay.
What Causes Rust and Corrosion in Metal?
Corrosion is a chemical reaction that occurs when metal is exposed to moisture, oxygen, and other environmental elements. The most common form of corrosion is rust, which typically affects iron and steel when they’re exposed to water and air over time.
Other factors that can speed up corrosion include:
- Salt exposure (especially near coastal areas)
- Acid rain or industrial pollution
- Standing water or poor drainage
- Scratches or damage to protective coatings
Understanding these causes is the first step toward prevention.
1. Choose the Right Metal Materials
Not all metals are created equal when it comes to corrosion resistance. Galvanized steel, aluminized steel, and weathering steel (like COR-TEN) offer enhanced protection in tough environments.
When you source metal from a trusted supplier, ask about rust-resistant options or treated materials designed for specific climate conditions. Fortified coatings and finishes can make a big difference in long-term performance.
2. Apply Protective Coatings
One of the most effective ways to prevent rust is by applying a protective coating that shields the metal from air and moisture. Popular options include:
- Galvanization: Coating steel with a layer of zinc to prevent oxidation.
- Powder coating: A dry, durable finish that resists chipping and scratching.
- Paint systems: Quality paints or primers designed for metal surfaces.
Be sure to maintain and reapply coatings as needed, especially in high-wear areas or locations exposed to the elements.
3. Ensure Proper Drainage and Ventilation
Water is the enemy of metal. If rainwater or condensation is allowed to pool or collect on metal surfaces, corrosion can quickly take hold. During the planning and installation phases, ensure your structure allows for:
- Proper water runoff from roofs and gutters
- Ventilation in enclosed areas to prevent humidity buildup
- Sloped surfaces to prevent standing water
- Small design changes can have a big impact on corrosion prevention.
4. Regular Maintenance Is Key
Routine inspections and maintenance can catch early signs of rust before they become serious. Look for:
- Discoloration or bubbling paint
- Visible rust spots
- Loose or damaged fasteners
- Scratches or dents that expose bare metal
Touch up scratches, reseal joints, and clean debris from surfaces to keep corrosion at bay. Make it a habit to inspect your metal structures seasonally.
5. Avoid Metal-on-Metal Contact
When two different metals come into contact in the presence of moisture, galvanic corrosion can occur. To prevent this:
- Use compatible fasteners and connectors
- Add insulation or protective barriers between different metals
- Follow manufacturer guidelines for hardware and structural assembly
- This is especially important when installing siding, trim, or roofing.
Protect Your Investment with Quality Materials
The first step to preventing rust and corrosion is choosing quality materials from a reliable supplier. Whether you’re building a new structure or upgrading an existing one, investing in the right type of metal and protective measures will save you time, money, and headaches down the road.
Summing Up
Need help selecting the best rust-resistant materials for your next project? The team at Fort Bend Steel Supply is here to help with high-quality steel products, expert fabrication, and fast, reliable service.
Call us today at (281) 499-5800 to get started or request a quote.