Treatment for Corroded Galvanized Hardware

Treatment for Corroded Galvanized Hardware
Corroded galvanized hardware can be treated by sanding, applying rust inhibitors, or re-plating.
Sanding and Rust Removal
If the rust is not severe, you can first use very fine sandpaper with water to gently sand away the rust. However, be careful not to sand randomly; sand in a straight line in the same direction. After sanding, wipe the surface thoroughly and apply a coat of primer. If the original paint is not available, you can purchase a touch-up pen and use it to apply color. While this treatment is not as effective as going to a beauty salon, it can help prevent rust from spreading and worsening on small or inconspicuous scratches.
Applying Rust Inhibitor
For galvanized parts that have been exposed for a long time, Amo Rust Prevention recommends spraying or applying the water-based zinc protective agent RK-401L. This protective agent has excellent hydrophobic properties and forms a transparent film on the zinc surface, which does not affect the appearance or performance. The specific process is as follows:
After the galvanized parts come off the production line, lubricate and prevent rust with CFR-301 cutting fluid at a refractive index of 2-3.
Dilute with CFR-301 to a refractive index of 0.5 and use spray or ultrasonic cleaning.
Immerse the galvanized workpiece in RK-401L water-based zinc protective agent at room temperature for 1-3 minutes.
Heat the workpiece soaked in RK-401L water-based zinc protective agent for 10-20 minutes. After the water is dried out, a zinc passivation layer forms on the metal surface. This passivation protects the zinc layer and the steel workpiece surface.
Re-plating
If the zinc coating has poor adhesion in certain areas, rust will develop in these areas, even if the zinc coating is thick. In this case, consider sending the galvanized parts to a professional electroplating plant for re-plating. Re-plating involves an acid wash to effectively remove the old zinc layer and rust, followed by a new zinc coating. The above are some treatment methods for galvanized hardware corrosion. It is important to note that prevention is always better than cure. In daily use, you should pay attention to regularly check the condition of galvanized hardware and take appropriate protective measures to extend its service life.