Galvanized square pipe is a kind of square pipe with zinc coating, which can be divided into hot-dip galvanized square tube and cold-dip galvanized square tube according to their application and function. In manufacturing, the hollow square section steel pipe with square cross-section is made by cold bending and high-frequency welding with hot-rolled or cold-rolled galvanized steel strip or galvanized coil plate as blank, which is mainly used in curtain wall and building, Machinery manufacturing, steel construction projects, shipbuilding, solar power generation support, steel structure engineering, electric power engineering, power plant, agricultural and chemical machinery, glass curtain wall, automobile chassis, airport, etc. Next, let's take you to know what derusting methods there are for galvanized square pipes?
1、 The galvanized pipe manufacturer should use solvent to clean the surface of steel to remove the organic matter on the surface。
2、 Then use tools to remove rust (wire brush), remove loose or skewed planning, rust, welding slag, etc,
3、 Pickling is used.
镀锌其防护效果更强，抗腐蚀能力强。整个结构由锌，构成细密的四元结晶体，此结晶体在钢板上构成一层屏障， 因此有用的避免腐蚀因子穿透。 耐腐蚀性来自锌的妨碍层维护功用强。当锌在切边、刮痕及镀层擦伤部份作牺牲维护时，锌便构成不能溶解的氧化物层，发挥屏障维护功用。
Zinc plating has stronger protection effect and stronger corrosion resistance. The whole structure consists of zinc, which forms a fine quaternary crystal, which forms a barrier on the steel plate, so it is useful to avoid the penetration of corrosion factors. Corrosion resistance from zinc barrier layer, maintenance function is strong. When zinc is sacrificed for maintenance at the cutting edge, scratch and coating scratch, zinc forms an insoluble oxide layer and plays a role of barrier maintenance.