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There’s more to painting galvanized steel sheets than slapping on a coat of paint. You just need some care and the right steps to make the paint stick properly and last. ASimple finish, such as a powder coat on an empty steel frame of wood (not treated), would be ideal for this new construction home. Hot-dipped galvanized coating is typically thicker than paint pipe and fittings, especially for threaded joints. The paint might peel or bubble up quite soon if you don’t prepare the surface well. Besides, choosing the optimum primer and applying it right will help keep paint in place while fighting off weather and wear. At Teni we’ve seen thousands of steel products and know how vital these small, thoughtful steps can be. Where to get good primers and how to prepare pre painted galvanized sheet for paint, so you get the best long-lasting results.
Where to Purchase Quality Primers for Painted Galvanized Steel?
Picking a primer, however, is more than grabbing the first can off of the shelf. Not all primers are created to use on galvanized steel. The zinc coating on galvanized steel can react with some paints and primers more than others, so even a freshly prepped roof may not hold up over time if the paint peels or fails prematurely. And so, you want to use a primer that’s specifically formulated for galvanized surfaces. When shopping for primers, read the label or product details to confirm it states compatibility with galvanized steel. At Teni, we advise buying primers with a good adhesion and the capability to accommodate this metal’s zinc layer. These primers often have certain specific chemicals that adhere to zinc surface without degenerative effects. You can purchase these primers from industrial supply stores or the metal coatings sections of online retailers. Sometimes, it’s best to buy directly from companies such as Teni, where you receive product that is quality tested and manufactured specifically for industrial use. This way, you are spare from weak primers that die off after some months. For instance, if you picked an inexpensive primer that wasn’t designed for use on galvanized mild steel sheet, you could notice rust beginning to form under the paint after a while. Invest in a good primer to start with. Furthermore, some primers dry quicker and give you the option of painting sooner than later to complete your work more efficiently. Be sure to purchase enough primer to treat every surface you want paint, lest you end up with an uneven end result. Last tip: always check the expiration date on the primer can—old primer doesn’t work as well. So, buy fresh, buy right and your coat of paint will last on your galvanized steel a lot longer than you might think.
What are Best Surface Treatments for Galvanized Steel Prior to Painting?
Surface treatment is akin to giving the steel a clean, new start on which to paint. Galvanized steel sheets are coated with oils and dirt that needs to be cleaned off; otherwise the paint won’t interfere well, or you can use a circular wire brush to remove any “white rust” which prevents good paint adhesion. Start by washing the surface with soap and water or a degreased. This clears away grease and grime which cause paint to adhere poorly. But sometimes, cleaning isn’t enough. Maybe with fine sandpaper or a wire brush to lightly scrape on the surface. This roughs up the zinc layer slightly, which gives the primer something to hold onto. The goal here is not to scratch until you see bare metal or remove the zinc coating entirely, only until the shine disappears, which should promote adhesion. Another technique is acid etching, in which a mild solution of acid is applied to the steel to alter the surface of zinc in such a way that it makes for better primer adhesion. But acid treatment has to be performed carefully and by someone who knows how to handle chemicals safely.
Tips for Wholesale Buyers
If you are purchasing galvanized steel sheets for large scale use, then there are a few things to consider to help ensure that the products you receive will be high quality and good value. For starters Make sure to always check the sturdiness and size of the galvannealed steel sheet. Various projects require different sizes and gages, so be mindfully shopping to ensure what you purchase is fit for your purpose. Thicker sheets are more durable, wear longer and typically cost more. You’ll also want sheets with a smooth zinc coating. This layer helps to shield the steel from rust, which is why the smoother and more even it is, the longer it will hold up.
Tip: You should purchase from a reputable company such as Teni that provides high-quality galvanized steel sheets. Purchasing from a reputable brand ensures that you’re buying sheets that meet safety, quality and performance standards. Don’t go with just the cheapest; sometimes cheaper steel can have problems such as cheap coating, or weak metal that could bite you later.
What Paints Are Best to Use on Galvanized Metal?
Painting galvanized steel sheet is a great way to cover sheet with paint, and make your own work cover format! Not all paints adhere well to galvanized steel because of its smooth zinc coating. For the best results, you’ll want to choose the right kind of paint and prepare the surface correctly.
The first to clean the galvanized steel sheet. Paint may end up failing to adhere because of dirt, oil and grease. The sheet can be washed with warm water and mild soap, then rinsed and dried thoroughly. If the surface is smooth, occasionally a light sanding will help the paint stick more.
Acrylic latex paint and oil-based paint are the best choices for galvanized sheet metal. Acrylic latex paints are favored for their fast drying time, soft flexibility, and resistance to cracking. They also do good with a primer designed for galvanized materials. Oils Oil-based paints are durable and have a solid, glossy finish. They are good for places where the sheet will get a lot of wear and tear.