Hot dip galvanized channel steel process flow

Raw material inspection → pickling → cleaning → zinc aid → drying → galvanizing → cooling → passivation → cleaning → finished product inspection → inspection packaging, etc.

According to the custom, the hot-dip galvanizing process is often divided into two categories: off-line annealing and in-line annealing according to the different pretreatment methods. Off-line annealing means that before hot rolled or cold rolled steel enters the hot galvanized line, recrystallization annealing is first carried out in the draw bottom annealing furnace or cover annealing furnace, so that there is no annealing process in the galvanized line.