Tips for Choosing Corrosion-Resistant Hollow Iron for Outdoor Projects

Hollow iron is a material widely used for canopy frames, fences, railings, and other outdoor structures. However, its use in open areas makes hollow iron susceptible to rust and corrosion if not selected properly.

To ensure a more durable and long-lasting construction, here are tips for choosing corrosion-resistant hollow iron for your outdoor projects.

1. Choose Galvanized or Galvalume Hollow Iron
For outdoor use, choose the following types:

• Galvanized Hollow Iron (zinc coated)
• Galvalume Hollow Iron (aluminum-zinc coated)

Both are highly resistant to weather, rainwater, and humidity. Galvalume is generally more durable because the aluminum combination effectively protects the metal from corrosion.

2. Pay Attention to Material Thickness
The thicker the hollow iron wall, the stronger it is and the less likely it is to corrode.

Recommended thickness for outdoor use:

Minimum 1.2 mm for canopies

1.4–1.6 mm for fences and railings

Above 1.8 mm for heavy structures or areas prone to corrosion

Avoid thin hollow bars, which can easily develop holes quickly.

3. Ensure an Even Anti-Rust Coating
Check the surface of the hollow bar:

No streaks

No deep scratches

Glossy and even coating

No black spots or early rust

An imperfect coating can cause the hollow bar to oxidize quickly.

4. Use Hollow Bars with Standard Certification
Choose products with clear SNI standards or from trusted manufacturers to ensure material quality.
Certified products typically have:

Galvanized coating according to standards

Consistent thickness

Longer corrosion resistance

5. Ensure Proper Storage and Distribution
Hollow bars that are stored improperly can be damaged before they are used. Choose a distributor that:

Store materials in a covered warehouse

Has a good sorting system

Keeps materials clean from rainwater and soil

Hollow that is already damp or wet before installation can corrode more quickly.

6. Consider Using Additional Paint or Coating
For extra protection, apply:

Epoxy primer

Anti-rust iron paint

Anti-corrosion clear coating

This step is highly recommended for projects in coastal areas or areas with high humidity.

Conclusion
Choosing anti-corrosion hollow steel for outdoor projects requires attention to the type of coating, thickness, manufacturing quality, and material condition. With the right selection, the structure will be more durable, strong, and maintenance-free in the long term.

Looking for Quality Galvanized or Galvalume Hollow Steel?
PT Intisumber Bajasakti (ISBS) provides various sizes of SNI-standard hollow steel, rust-resistant, and suitable for outdoor construction needs.

📞 Phone: 021-66675999
🌐 Website: intisumberbajasakti.com
✉️ Email: info@intisumberbajasakti.com

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