Pickling Of China Nut
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Hot-dip galvanizing China Nut pickling, hot-dip galvanizing (galvanizing) is also called hot-dip galvanizing and hot-dip galvanizing: it is an effective method of metal anticorrosion, mainly used in metal structure facilities in various industries. It is to immerse the derusted steel parts in a molten zinc solution at about 500℃ to make the surface of the steel parts adhere to the zinc layer
1) Pickling workers must wear labor protection supplies before work, carefully check the work site for obstacles and whether the sling is intact, and only after confirming that they are intact.
2) The acid pickling mainly adopts hydrochloric acid pickling, and water is used to prepare hydrochloric acid. The appropriate content of hydrochloric acid is 18-20%.
3) Before pickling work, first understand the acid concentration, temperature and the tonnage of the pickling tube in this tank.
4) When hanging the pipe, the two slings should be about 1.3 meters away from the end to prevent the steel pipe from being bent and cause internal leakage of the galvanized pipe; Sour.
5) Each time the steel pipe is pickled, the weight should be 2 to 5 tons, and the time is 5 to 15 minutes.
6) The steel pipe should be vibrated frequently during pickling. During the vibration, the steel pipe should be placed flat on the horizontal stone of the acid tank, and the sling on one side should be started 3 times and then the sling on the other side 3 times, and then repeated twice. Lifting; the vibration rising angle is not more than 15°.
7) When heating the acid tank, fix the steam pipe firmly before opening the steam valve.
8) When the crane pipe of Bolt Factory enters and exits the acid tank, it must not hit the tank wall to prevent damage to the acid tank.