Nowadays, hot -dip galvanized steel pipes are common types of fire management, and they have fully exerted irreplaceable effects in the fire safety industry. Why can't the hot -dip galvanized pipe be replaced by cheaper welded pipes or cold galvanized pipes?
The thermal galvanized creation was invented in the mid -18th century. It was made of the development trend of the heat -plating processing process, and it was more than 300 years of historical time. To this day, hot -dip galvanized is still a widely used and effective processing process countermeasure in steel corrosion.
The basic principle of galvanized steel depends on: except for the first layer of coverage produced, in addition to the corrosion of the gas and moisture on the steel pipe, the iron is more electrical than the iron than the zinc. Sacrifice the zinc layer to protect the steel inside. Therefore, the corrosion resistance working ability of general welded pipes cannot be caught. Even if the steel that has been solved by anti -corrosion methods such as applying paint, the corrosion resistance work ability cannot be compared with the hot galvanized pipe.
The galvanized layer of the hot -dip galvanized pipe is a shell covered with the surface layer of the steel pipe after soaking, and the cold galvanized pipe is a plastic film generated according to the electrolytic reaction. Therefore The distance is higher than the cold -dip galvanized pipe. From the basic principles of galvanizing steel to maintain steel, we can understand that the thicker the galvanized layer, the greater the zinc, the better the protection effect of steel. Therefore, the thickness of the galvanized layer is far lower than the hot -dip galvanized steel pipe of the other side, and the corrosion resistance is dozens of times the cold galvanized steel pipe.
Because of the same reason, the coating of hot galvanized pipes is closely coated. The adhesion of the galvanized layer is better than the cold -dip galvanized pipe. The high adhesion means that the galvanized layer is not easy to be destroyed due to the impact friction during the entire transportation process. Essence
The hot -dip galvanized steel pipe is soaked in a galvanized pipe in the galvanized pipe when it is made. Therefore, any exposed inner and outer surface can be galvanized, and the cold galvanized steel pipe usually uses a whole piece of zinc during production. The thick steel plate roll is welded and welded, and there is no protection of the galvanized layer at the welded seam of the tube.
Therefore, in order to ensure more fire control, everyone will choose a more secure and durable hot -dip galvanized steel pipe.
