How to distinguish between cold plating and hot rolled round steel?
Cold galvanized profiles: cold galvanized is electroplating, is absorbed by the charge, the charge is concentrated in the edge, angle and other cutting-edge, so the inner surface and recess will not be plated phenomenon. The surface of the steel is relatively smooth and bright.Hot dip galvanized bar: hot dip galvanizing is to remove oil, pickling, dipping and drying into the molten zinc bath for a certain period of time. The appearance was galvanized slightly rough, silvery white appearance, easy to produce and process water a few drops of tumor, especially in the one end of the workpiece is more obvious.Galvanized quality certificate must be provided for hot-dip galvanized sections.
The difference between galvanized products: hot galvanized surface is not cold galvanized, delicate and bright, but the thickness of zinc coating, hot galvanizing is cold galvanized dozens of times. Corrosion resistance is also tens of times zinc plating.
Cold galvanizing also called electro galvanized, is the use of the workpiece after electrolysis equipment except oil, after pickling solution into the composition of the zinc salt in the anode and connected electrolytic equipment; cathode zinc plate placed in the workpiece in the electrolysis equipment connected across the power supply is switched on, the current directional moves from the anode to the negative pole, will depositing a layer of zinc on the workpiece.
First of all, the difference between the process is: hot-dip galvanizing is to remove the workpiece, oil, pickling, dipping, drying, immersed in dissolved zinc liquid, a certain time, can be put forward.
