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Solutions: Rusting Metal Doors
November 2, 2021 at 4:00 AM

Rust is caused when iron comes into direct contact with water and oxygen. Technically, rust comes from a chemical reaction between carbon dioxide from the air, water, and iron. Rust is nothing more than simply corroded iron. When oxygen combines with water then iron is dissolved.

Florida’s climate makes corrosion and rust on weather exposed metal substrate commonplace. Typically, once rust is discovered within a metal substrate the entire substrate should be properly stripped down to “white metal” cleaned, primed & painted.

Spot priming of the rusted area is only a short-term temporary fix. Once Rust is in metal the rust will continue to spread. If one area is treated, it is likely that rust will breakout elsewhere. The following steps are essential when corrosion resistance is required. Corrosion resistance painting systems are a challenge in our climate. Maintenance is a necessary process in rust or corrosion resistance.

  1. Sand blast, wire wheel, or wire brush all crusty, mill scaled surfaces to a smooth, rust-free condition. Ultimately, sand blasting to an SSPC 6 commercial blast is superior to hand techniques of rust removal. Any rust not removed will continue to corrode underneath new coating systems. All five sides need to be treated equally (exterior face, (2) side ends, (2) top and bottom ends.
  2. Wipe down the prepared surface with mineral spirits or VM&P Naphtha to remove residues, dust, and grease, and let dry.
  3. Apply a full coat of