Introduction To Common Problems Of Anti-corrosion Steel Pipe Coating Materials

Common problems can be roughly divided into three types, which are uneven coating, dripping of preservatives, and foaming of preservatives.

1. Uneven coating. The fundamental manifestation of this kind of problem is that the preservative is unevenly distributed on the surface of the steel pipe. Some parts are too thickly coated, while some parts are too thin or not coated with oil at all. Therefore, the thickness of the coating in the place where the coating is too thick exceeds the standard, resulting in waste; and the place where the coating is too thin or not covered will reduce the anti-corrosion ability of the steel pipe, resulting in final corrosion.

2. Antiseptic hanging drops. The anticorrosion agent solidifies on the surface of the steel pipe like water droplets, which is the phenomenon of anticorrosion agent hanging drop. The occurrence of this phenomenon often does not directly affect the corrosion resistance, and it can also ensure the corrosion resistance required by the steel pipe; but from the aesthetic point of view, there is no corrosion resistance. The steel pipe with dripping agent looks dull and uneven, which directly affects the appearance of the steel pipe

3. Antiseptic foaming. Due to the air entering the preservative, bubbles are formed in the coating of the steel pipe. These bubbles vary in size according to the specifications of the steel pipe. The shape of the larger air bubbles is like the air bubbles on the protective cover of some home appliance remote controls, and the air bubbles will be broken when pressed with a little force. The foaming phenomenon of anti-corrosion agent not only affects the appearance of the steel pipe, making the surface of the whole steel pipe rough and not smooth, but also the damage of the bubbles will reduce the standard of the coating film thickness, reduce the anti-corrosion ability, and finally lead to the corrosion of the steel pipe where the bubbles are located .