钢结构的防腐措施之热浸锌发布时间：2015/10/12 9:11:22 浏览次数:816
Hot-dip zinc is about 600 ℃ after rust removal of steel members in high temperature melting liquid zinc, zinc layer adhered on the surface of the steel members, the zinc layer thickness of 5 mm below the sheet should not be less than 65 microns, the plate is not less than 86 microns. Thereby the purpose of corrosion protection.
The advantage of this approach is durable life long, the production of high degree of industrialization, quality and stability. So heavily used by atmospheric corrosion is serious and difficult maintenance of outdoor steel structure. Such as a large number of transmission tower, communication tower, etc. In recent years a large number of the pressed steel sheet of light steel structure system, etc. More also adopts hot-dip zinc corrosion. Hot dip zinc is the first working procedure pickling, and then is clean.
Both procedure does not completely to corrosion resistance. So must be dealt with thoroughly. For steel structure designer, should avoid design phase of the joint components, in order to avoid the joint surface crack in the pickling incomplete or acid wash not clean. Galvanized surface flow including yellow phenomenon. Hot dipped zinc was conducted at high temperatures. For tubular components should let it open on both ends. If both ends closed air inflation will cause the tube and make the head plate burst, causing accidents. If one end closed the zinc liquid circulation, easy to accumulate in the tube.