When customers buy shackle products, they will be asked whether want hot-dip galvanized or cold-galvanized. Hot-dip galvanizing and cold-dip galvanizing, there are some differences between these two surface treatment processes.
Electro galvanization is a process for anti-corrosion treatment of the workpiece surface through the electro chemistry, it is also known as cold galvanizing. The electrolytic device is used to degrease and pickle the workpiece into a zinc ate solution, and is connected to the negative electrode of the electrolytic device. A zinc plate is placed on the opposite side of the workpiece. Directional movement to the negative electrode will deposit a layer of zinc on the workpiece. Features: thin zinc layer, low adhesion, low price and heavy pollution
Hot-dip galvanizing, it is to immerse the rust-removed steel parts in a molten zinc solution at about 500 ° C to attach a zinc layer on the surface of the workpiece, thereby achieving the purpose of corrosion prevention. Hot-dip galvanizing process: finished product pickling-washing-filling plating solution-drying-hang plating-cooling-medication-cleaning-polishing-hot-dip galvanizing is completed. Hot-dip galvanizing is developed from an older hot-dip galvanizing method. In the past three decades, with the rapid development of cold-rolled strip, the hot-dip galvanizing industry has developed on a large scale. Features: The zinc layer is thicker, has strong adhesion, the zinc layer is not easy to fall off, the pollution is small, and the price is high.
In terms of technology, hot galvanizing is more advanced than cold galvanizing. In terms of use, the zinc coating of cold galvanized shackles usually comes off after two or three years of use. The hot-dip galvanizing has a relatively long service life and better corrosion resistance. According to the use environment of the shackle, considering the characteristics of hot-dip galvanizing and electro-galvanizing, you can correctly choose the shackle product you need.