What's the difference between galvanized cable tray, cold galvanizing, hot galvanizing, hot dipping galvanizing and hot dipping galvanizing?
The difference between galvanizing and hot-dip galvanizing is as follows:
1. Different concepts: Hot dip galvanizing, also known as hot-dip galvanizing or hot-dip galvanizing, is an effective way of metal corrosion prevention, mainly used for metal structural facilities in various industries. Immerse the rust removed steel parts into molten zinc that melts at around 500 ℃, so that a layer of zinc adheres to the surface of the steel parts, thereby achieving the purpose of corrosion prevention.
Electrogalvanizing, also known as cold galvanizing in industry, is a process that uses electrolysis to form a uniform, dense, and well bonded metal or alloy deposition layer on the surface of parts.
Compared with other metals, zinc is a relatively inexpensive and easy to coat metal. It is a low value anti-corrosion coating widely used to protect steel parts, especially to prevent atmospheric corrosion and for decoration.
2. The hot-dip galvanizing process is different: finished product pickling - washing - adding auxiliary plating solution - drying - hanging plating - cooling - chemicals - cleaning - polishing - hot-dip galvanizing is completed.
Electrogalvanizing process: chemical degreasing - hot water washing - water washing - electrolytic degreasing - hot water washing - water washing - strong corrosion - water washing - electroplating zinc iron alloy - water washing - water washing - polishing - passivation - water washing - drying.
3. There are many hot-dip galvanizing processes with different procedures. The workpiece can only be immersed in the molten zinc tank after being degreased, pickled, soaked, and dried, and can only be extracted after a certain period of time. This is hot-dip galvanizing, and some hot-dip coated pipe fittings are processed in this way.
When using electrolytic equipment for galvanizing, it should be immersed in a solution containing zinc salts after oil removal and acid washing. The electrolytic equipment should be turned on, and during the directional movement of positive and negative currents, the deposited zinc layer should precipitate on the workpiece.
4. The overall appearance of hot-dip galvanizing is slightly rough, which may result in process water marks, droplets, and other manifestations, especially at one end of the workpiece, which is clearly silver white overall.
The galvanized surface is relatively smooth, mainly in yellow green color, but there are also various colors such as multicolored, bluish white, and white green light. The entire workpiece basically does not have zinc nodules, lumps, or other phenomena.
