Preparing Galvanized Sheet Metal For Painting

Successfully painting hot dip galvanized steel also known as a duplex system does not have to be difficult or confusing.

Preparing galvanized sheet metal for painting.

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. There are documents available that describe methods of preparing surfaces of new and weathered hot dip galvanized steel for painting. If you have a kitchen then you probably already have this handy solution.

Sand the entire. Wipe the galvanized surface down with white vinegar. Common household products like comet mineral spirits and chlorine bleach can all be used to prepare galvanized steel for painting. Here s how to paint galvanized metal.

How to prepare zinc coated galvanized sheet metal for painting so that the primer and paint sticks. Additionally slightly different methods may be recommended according to the condition of the galvanized surface newly galvanized partially weathered galvanizing fully weathered galvanizing. 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. Rinse the metal with a weak solution of water and ammonia and allow it to dry.

The secret to painting galvanized steel is white vinegar. The vinegar is a mild acid. White vinegar is both effective and non toxic so it is much safer to use than your average industrial solvent. Preparing hdg for paint.

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. A powerful degreaser will cut through dirt grime mold and other problematic residue without affecting the temperamental zinc coating. Remove any handles or other attachments from the metal.

Go over the metal with a wire brush to remove any oxidation. Wash the metal thoroughly with hot soapy water.