[China Aluminum Network] This waste solution can not be used as an alkaline corrosion of aluminum parts, this is because there are zinc in the solution, the surface of the aluminum parts after alkali etching is prone to spots, and in severe cases it will make the entire surface of the workpiece Hair flowers. To use this solution, industrial solutions of sodium sulfide can be used to oxidize the zinc ions released from the solution to precipitate zinc sulfide.
Continuous beam is a common term for two or more continuous collinear beams that are supported by columns or other beams without seismic performance requirements. It is not often built in earthquake-prone countries like Greece. On the other hand, it is widely used in areas with little seismic activity. As far as steel bars are concerned, the structure of continuous beams without seismic behavior requirements is much simpler than that of seismic beams.
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