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How to Remove Red Rust on Galvanized Steel?

Galvanized steel is protected against rust by a surface coating that insulates it from air, water, etc. In normal environments, galvanized steel with a high zinc coating has a lifespan of 20–50 years. However, surface rusting often occurs due to humid storage environments, thin zinc coatings, etc. Effective surface preparation and preventive measures are essential. Effective surface treatment and preventive measures will reduce our operating costs.

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Coil with Zero Spangle

How to Deal with Red Rust on Galvanized Steel Surface?

Red rust on galvanized steel is due to oxidation of the steel base after the destruction of the galvanized layer of corrosion phenomenon, once found on the surface of galvanized steel rust, promptly to prevent the expansion of the corrosion area. Common red rust treatment methods are mechanical rust removal, chemical rust removal, sandblasting, and household convenience rust removal measures.

Mechanical: Removal of surface rust by shovels, sandpaper, motorized brushes, and motorized brush wheels.

Chemical: Removal of rust using an acidic solution that reacts with the rust.

Sandblasting: Sand is sprayed onto galvanized steel surfaces and rubbed to remove rust.

Other: Red rust on small galvanized parts can be removed with white vinegar.

How to Avoid Galvanized Steel Rust?

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Improve the quality of galvanized steel: Ensure the thickness of the zinc layer, followed by strict control of production to ensure that the zinc layer is uniform and free of defects.

Storage environment management: Avoid the storage environment is too humid.

Coating: Organic coatings can be applied to the surface to enhance corrosion resistance.

Inspection and maintenance: Conduct regular inspections, remove red rust in time, and repair any damage.

Recommended Zinc Coating for Different Use Environments

To maintain the performance of galvanized steel for a long time, we must first determine the use environment, and then choose the appropriate zinc layer thickness according to the application scenario. For general environments, industrial areas, and marine environments, we have the following suggestions.

Use	Recommended
Indoor uses	Z10 or Z12 (100 g/㎡or 120 g/㎡)
Suburban area	Z20 and painted (200 g/㎡)
Urban or industrial area	Z27 (270 g/㎡) or G90 (American Standard) and painted
Coastal area	Thicker than Z27 (270 g/㎡) or G90 (American Standard) and painted
Stamping or deep drawing applications	Thinner than Z27 (270 g/㎡) or G90 (American Standard) to avoid coating peeling off after stamping

Where to Buy High-Quality Galvanized Steel?

If you are looking for a high-quality galvanized steel supplier! Then Wanzhi will be your best choice. First, we have our production line, and we can customize steel with different specifications and zinc layer thickness. Secondly, we have a supply chain management system, which not only has raw material inventory but also can save costs from all links and provide the most competitive prices. Finally, we have served more than 100 countries including Malaysia, Saudi Arabia, UAE, Belarus, France, Colombia, Chile, Azerbaijan, Libya, Indonesia, etc.