I take galvanized pipe to weld the bedstead, the galvanized pipe surface needs coating, the paint, but the paint adhesion is not good, how should I do?
The surface is smooth, paint adhesion is not good, there must be a little roughness, with coarse shar beat.
The adhesion of the film to the smooth zinc coating is very weak.Therefore, there is no need to paint, and if you have to paint, then it is recommended to carbon steel pipe welding, rust paint after brushing can be.
Galvanized pipe, as its name suggests, is a layer of zinc plated steel tube, forming a battery, to prevent electrochemical corrosion.
