The technological process of hot-dip galvanized bolts is as follows: pickling, washing, adding auxiliary plating solution, drying, hanging plating, cooling, medicating, cleaning, grinding and hot galvanizing.
Hot dip galvanized hexagon bolt is an effective metal anti-corrosion method, which is mainly used in metal structure facilities of various industries. After rust removal, the bolts are immersed in molten zinc at about 500 ℃ to make the surface of screws and nuts adhere to zinc layer, so as to achieve the purpose of anti-corrosion. The zinc coating is relatively firm.
Generally speaking, there is no need to heat for cold galvanizing, and the amount of zinc plating is very small. This kind of galvanized parts are easy to fall off in wet environment.
It can be seen that the effect of hot galvanizing is better than that of cold galvanizing, so hot galvanizing is adopted for bolts.
Hot-dip galvanized bolts series: grade 4.8, grade 8.8, grade 10.9, external hexagon screw and inner hexagon screw.
Advantages of hot-dip galvanized bolt:
1. Low treatment cost: the cost of hot dip galvanizing is lower than that of other coatings;
2. Durable: in the suburban environment, the standard thickness of hot-dip galvanized antirust can be maintained for more than 50 years without repair; in the city, hot-dip galvanized screws are also called hot-dip galvanized and hot-dip galvanized bolts: it is an effective metal anti-corrosion method, mainly used in metal structure facilities of various industries. After rust removal, the bolts are immersed in molten zinc at about 500 ℃ to make the surface of screws adhere to zinc layer, so as to achieve the purpose of anti-corrosion.
Galvanized ASME A325 Heavy Hex Bolt, Zinc Galvanized ASTM A325M A490 B7 B8 Heavy Hex Hexagon Head Bolt, Stock ANSI ASTM A193 GR B7 Heavy Hex Bolt, High Tensile ASTM A325/A490 Bolts And Nuts China Factory 1.Name: Galvanized ASME A325 Heavy Hex Bolt 2.Size: M12-M36 3.Standard:ASTM A325 bolt 4.Material:carbon steel 5.Finish:Black/HDG/Zinc-Plated 5.Packing: Standard export packing […]