Painting Galvanised Sheet Metal

New galvanized metal a product used to make corrugated sheets gutters and downspouts is usually smooth and is coated with either a layer of oil to prevent white rust or is passivated.

Painting galvanised sheet metal.

Go over the metal with a wire brush to remove any oxidation. Bituminous latex acrylic and vinyl paints tend to adhere well to galvanized metals. Prime the surface with a primer made for metal. How to paint galvanized metal.

Remove any handles or other attachments from the metal. There are four recognised methods of surface pre treatment that produce a sound substrate for a paint coating. Metals depot stocks many sizes in precut sizes full mill sizes or we can hot dip virtually any. The vinegar is a mild acid which acts to etch the galvanized coating so the paint will stick.

Galvanized steel sheet plates are intended for use where greater corrosion protection is required without painting a lower cost alternative to stainless steel galvanized sheet and plates have a rust free protection for up to 30 years while maintaining strength with a durable surface coating. Galvanized steel is coated with a thin layer of oil and passivator that protects it from water and weather damage. White vinegar is both effective and non toxic so it is much safer to use than your average industrial solvent. Paint applied over this oily surface or clear passivator will peel quickly.

The following is a quick introduction for the process. Rinse the metal and let it dry completely for several hours. Wipe the galvanized surface down with white vinegar. Rinse the metal with a weak solution of water and ammonia and allow it to dry.

You first are advised to prepare the surface of the item to be painted so that the paint for galvanized metal stands its best chance of looking good for several years. Preparation of galvanized steel before painting. All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface. The enamels in alkyd paints can react with the slick zinc finish on a galvanized steel surface leading to poor adhesion and peeling.

For the most dependable results look for paints that are formulated specifically to bond to galvanized steel. That s great for preventing rust but it also prevents solid paint adhesion. The secret to painting galvanized steel is white vinegar. Here s how to paint galvanized metal.

T wash etch primers sweep blasting and weathering. Wash the metal thoroughly with hot soapy water.