Preparing Galvanized Sheet Metal For Painting

There are documents available that describe methods of preparing surfaces of new and weathered hot dip galvanized steel for painting.

Preparing galvanized sheet metal for painting. Rinse the metal with a weak solution of water and ammonia and allow it to dry. Go over the metal with a wire brush to remove any oxidation. Wipe the galvanized surface down with white vinegar. On older galvanized metal surfaces where the zinc coating has begun breaking down known as white rust use a wire brush or fine sandpaper to remove the chalky film before cleaning it.

In addition to sspc sp 16 referenced earlier astm international has published standard practice d6386 10 standard practice for preparation of zinc hot dip galvanized coated iron and steel product and hardware surfaces for painting. Wash the metal thoroughly with hot soapy water. Remove any handles or other attachments from the metal. All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface.

Sand the entire. Common household products like comet mineral spirits and chlorine bleach can all be used to prepare galvanized steel for painting. Once the metal has been cleaned and is dry prime it using an exterior multipurpose latex primer or a latex primer that is made specifically for galvanized metal. The vinegar is a mild acid.

Here s how to paint galvanized metal. White vinegar is both effective and non toxic so it is much safer to use than your average industrial solvent. If you have a kitchen then you probably already have this handy solution. Successfully painting hot dip galvanized steel also known as a duplex system does not have to be difficult or confusing.

Rinse the metal and let it dry completely for several hours. Just like painting over bare steel proper surface preparation is crucial to ensuring effective adhesion. Proceed in small sections until you ve cleaned the entire surface. Preparing hdg for paint.

The secret to painting galvanized steel is white vinegar. How to prepare zinc coated galvanized sheet metal for painting so that the primer and paint sticks.