Preparing Galvanized Sheet Metal For Painting

Go over the metal with a wire brush to remove any oxidation.

Preparing galvanized sheet metal for painting.

How to prepare zinc coated galvanized sheet metal for painting so that the primer and paint sticks. Common household products like comet mineral spirits and chlorine bleach can all be used to prepare galvanized steel for painting. Wash the metal thoroughly with hot soapy water. If you have a kitchen then you probably already have this handy solution.

Just like painting over bare steel proper surface preparation is crucial to ensuring effective adhesion. Sand the entire. Preparing hdg for paint. There are documents available that describe methods of preparing surfaces of new and weathered hot dip galvanized steel for painting.

Remove any handles or other attachments from the metal. Wipe the galvanized surface down with white vinegar. The secret to painting galvanized steel is white vinegar. Rinse the metal and let it dry completely for several hours.

Proceed in small sections until you ve cleaned the entire surface. All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface. Additionally slightly different methods may be recommended according to the condition of the galvanized surface newly galvanized partially weathered galvanizing fully weathered galvanizing. A powerful degreaser will cut through dirt grime mold and other problematic residue without affecting the temperamental zinc coating.

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. Here s how to paint galvanized metal. Rinse the metal with a weak solution of water and ammonia and allow it to dry. 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.

The vinegar is a mild acid. 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.