Hot dip galvanized flange and cold galvanized flange main difference
Obviously, the two galvanizing processes are used at different temperatures and different galvanizing processes.
The processing process of hot-dip galvanized flange is, first of all, the flange is immersed in the temperature of 440-465℃ in the process of processing of molten zinc, iron matrix and zinc reaction, the formation of fe-zinc alloy layer on the surface of the whole workpiece, so as to make the original carbon steel flange galvanized successfully, become hot-dip galvanized flange; The processing process of cold galvanized flange is different. Usually, the cold galvanized flange we say is to galvanize the flange by means of electric galvanizing, that is, to electrolyze zinc salt solution first, and then directly to the flange coating.
It is because the galvanized process of hot dip galvanized flange and cold dip galvanized flange is different, so the main difference between hot dip galvanized flange and cold dip galvanized flange is mainly reflected in the production process, price, molding appearance and so on.
The galvanized process requirements of hot dip galvanized flange are oil removal, pickling, soaking, drying, the process is more complex. Cold galvanized flange galvanized process requirements are oil removal, pickling, electrolysis, hot dip galvanized production, the operation is relatively simple.
The cost of hot-dip galvanized flange is lower than that of other paint coatings, because the hot-dip galvanized flange is to immerse the steel parts after rust in the zinc solution melted at about 500℃, so that the surface of the steel members is attached with zinc layer, so as to play the purpose of anticorrosion. Cold galvanized flange is to first electrolyze zinc salt solution, and then directly to the pipe coating, so as to play the purpose of anticorrosion.
Hot dip galvanized appearance looks thick, texture is relatively strong (left picture), cold galvanized looks more smooth, delicate (right picture). Hot dip galvanized zinc layer is much thicker than cold galvanized, forming a special metallurgical structure, this structure can withstand mechanical damage in transport and use, its anti-corrosion ability is also much higher.
The above is the main difference between hot dip galvanized flange and cold dip galvanized flange introduced by Hebei Haihao Group. We hope that customers can understand or communicate with us, and choose the appropriate galvanized method to achieve anticorrosion effect according to the actual situation. Welcome new and old customers to come to exchange and consultation!