How to do anti-corrosion work well in steel pipe factory
1. Compared with other traditional pipes, steel pipe supply steel pipe has light raw materials, high strength, good endurance, can withstand higher internal pressure, sensitive production and use, and can get used to messy or harsh geological conditions.
2. However, the steel pipe has a large percentage end in the application process, which is mainly caused by the trouble of internal and external anti-corrosion treatment. The first question of external anticorrosion is very crucial, its external anticorrosion quality directly affects its service life. Nowadays, the external anticorrosion of domestic steel pipes is mainly: concealing the practice. The steel pipes are requested to be enhanced or extra-enhanced external anticorrosion, and some areas promote cathodic protection. About the hidden type of external anticorrosive method is usually paint such as petroleum asphalt, epoxy coal asphalt, etc., the latter is not easy to cure at low temperature, and in the field of welding construction more questions, previously used this chlorosulfonated polyethylene, because most solvents, easy to pinhole, resistance to wear unqualified, clear in some areas no longer used. On the cathodic protection of its anti-corrosion effect is better, but because of the selection of sacrificial anode method, in the future operation must be regularly replaced anode, increased operating costs and operations.
In addition to the inner wall treatment question, steel pipe supply usually choose three methods: anticorrosive paint, resin mortar, cement mortar. There are two questions in the three methods: ****** is the question of the bonding strength of the anticorrosive layer and the steel pipe, and the cement mortar has been said in front. On the anticorrosive coating and resin mortar two methods are required to thoroughly remove rust on the inside of the steel pipe before construction, but this is difficult to do without missing. Therefore, the rust spots form the source of the future delamination, forming corrosion and scaling; Second, the vast majority of steel pipes are welded on site, and anti-corrosion is carried out after welding. It has to be done manually. Quality is not easy to control, and with respect to the small diameter pipe, because personnel cannot access the construction, no longer anticorrosive. Also formed the future weld damage hidden danger. According to the analysis of several pipe burst accidents, it is mainly caused by the corrosion of welding seams with low quality.
