The contribution of welded pipe equipment in the welding industry is immeasurable, and the care of it by enterprises should be paid more attention. So how can the service life of welded pipe equipment be extended in the actual production process?
In order to extend the service life of welded pipe equipment, galvanizing is a good choice at present. Galvanizing is actually to extend the life and protect the equipment. Before galvanizing, adequate preparations should be made. First of all, we must clean the surface of the steel pipe of the welded pipe equipment to ensure that the surface of the steel pipe is clean, remove rust, iron oxide, etc., so as to ensure the adhesion of the coating. Therefore, the steel pipe must be surface pretreated before plating. General pretreatments include degreasing, washing, pickling, and then washing.
Next is the degreasing operation. The so-called degreasing is to remove the grease and dirt on the surface of the black pipe, so as not to affect the pickling effect. General alkaline washing can be achieved by burning or alkaline washing. It should be noted that the alkaline washing time of the high frequency pipe welding machine is generally kept at 8-10 minutes.
The latter is pickling. Although alkaline cleaning can also remove stains, the two types of stains are slightly different. The purpose of pickling is to remove the oxide scale on the surface of the steel pipe. Its advantage is that it can be operated at room temperature, has strong ability to remove iron oxide scale, the base metal is less corroded, and the hydrogen absorbed is less, and the possibility of contamination of carbon black residue is small. The iron salt produced by pickling is oxide, deep angle It is large, easy to remove, and has no effect on galvanizing. From the perspective of galvanizing, hydrochloric acid pickling is more appropriate.
