Galvanized Steel Sheet

1. Clean the surface
The goal is to remove any dust, dirt, or other particulate buildup that could affect the texture of the metal surface.

2. The secret to painting galvanized steel is white vinegar.
Simply apply the vinegar to a clean rag and then wipe down the galvanized surface. The acidity of the vinegar will react with the metal, treating the surface to promote paint adhesion.

3. Choose a type of paint
You may or may not need to prime the surface depending on the type of paint you choose.

4. Paint away!
The painting process is actually very straightforward, because the surface of galvanized steel is relatively smooth and consistent.

Cutting galvanised steel is a fairly straightforward process. To ensure it is done safely, it must be clamped securely and facing upwards. Then, it can be cut in the way you want with the use of a circular saw. Finish by sanding down the edges to make them smooth and snag free.

Wearing thick gloves and safety glasses will ensure you do not get cut by the metal, nor will it fly and injure you when you are cutting it. These safety precautions are recommended when cutting galvanised steel, just like when cutting any type of metal.

For general cleaning of bulk contaminants such as dirt and the like, ordinary laundry soaps can be satisfactorily used. For more stubborn or larger areas, the use of a low pressure wash (such as a gurney gun), with just pure water or in conjunction with proprietary cleaning materials such as car wash or truck wash, can be effective. The car and truck cleaners are made to minimise corrosion on the metallic parts of vehicles so are generally suitable for use on galvanized steel although it is important that the steel be washed down with freshwater after cleaning.

Many mild stains (such as those from water ponding and water runs or, in public areas, those from beverages such as beer, wine etc) can be removed with the use of common household ammonia cleaners, again being sure to thoroughly rinse the galvanized article with freshwater afterwards.

Often, water draining from other adjacent steelwork that is rusting can flow on to galvanized steel and cause conspicuous brown staining. This can be treated with the use of commercial oxalic acid or a proprietary solution that has been developed for descaling pots and pans. Thorough rinsing with water is again important to remove any corrosive residues of the cleaner.

Sometimes during building or renovations, cement and mortar can be dropped onto the galvanized steel and this can be very difficult to remove once it has hardened. Firstly remove the large parts of the deposit as close to the surface as practicable, then oxalic acid can be used to remove the remaining remnants from the galvanized steel, followed with a thorough rinsing. Other acids are more effective on the mortar or cement, but these can be very aggressive on zinc and are not recommended.

Paints, such as graffiti, can be removed using thinners. If some form of scraping is required, use plastic or wooden scrapers (not steel/metallic items). If the paint is wet or fresh, then normal thinners can be used. Once the paint has hardened, then a non-alkaline stripper can be used. Again, rinsing is important to remove residues that may cause discolouration later and/or encourage corrosion.

Yes. We provide customized processing services such as soldering, welding, cutting, bending, etc. Please contact us for details.