Process of hot-dip galvanizing bolts: finished product pickling-washing-adding auxiliary plating solution-drying-rack plating-cooling-chemical treatment-cleaning-polishing-hot-dip galvanizing completed.
Hot-dip galvanized hexagon socket bolts are an effective metal anti-corrosion method, mainly used in metal structure facilities in various industries. The rust-removed bolt is immersed in a molten zinc solution at about 500°C to attach a zinc layer to the surface of the screw and nut to achieve the purpose of corrosion protection. The galvanized layer is relatively strong.
Cold galvanizing generally does not require heating, and the amount of galvanizing is very small. This kind of galvanized parts is easy to fall off in a humid environment.
It can be seen that the effect of hot-dip galvanizing is better than cold-dip galvanizing, so the bolts are hot-dip galvanizing.
Hot-dip galvanized bolt series: 4.8 grade, 8.8 grade. 10.9 grade outer hexagon screw, inner hexagon screw.
Advantages of hot-dip galvanized bolts:
1. Low processing cost: the cost of hot-dip galvanizing and rust prevention is lower than that of other paint coatings;
2. Durable and durable: In the suburban environment, the standard hot-dip galvanized anti-rust thickness can be maintained for more than 50 years without repairing; in the city, the hot-dip galvanized screw is also called hot-dip galvanized and hot-dip galvanized bolt: it is an effective Metal anti-corrosion methods are mainly used in metal structure facilities in various industries. The rust-removed bolt is immersed in a molten zinc solution at about 500°C to attach a zinc layer to the surface of the screw to achieve the purpose of anti-corrosion.