In the manufacture of elevator expansion bolts will go through a lot of procedures, pickling is one of these procedures. Pickling is a method used by many parts, there are many kinds of pickling methods. It is as if the anchor bolt will acid wash its wire. The reason for this is to clean the skin of the anchor bolt, that is to remove the oil impurities on the surface of the anchor bolt. Acid pickling has a very good effect on cleaning dirty things.

When manufacturing elevator expansion bolt, the pickling process is the most important The main purpose is to clean the surface of the elevator expansion bolt, that is to remove the oxide film on the surface of the elevator expansion bolt. Acid pickling will form a new protective film on the surface of the elevator expansion bolt. We call this film phosphate film, which can reduce the axis of wire rod cold pier reduce the number of elevator expansion bolts in line When it hurts the mold.

After pickling, the elevator expansion bolts will be cleaned with clean water, then the metal activity will be enhanced by oxalic acid. After finishing this, the skin treatment will be carried out again, which will make the steel skin the formed treatment liquid can meet perfectly. The dissolving liquid of steel can produce insoluble compounds, it will stick to the surface of steel become a layer of skin. Then use water to clean the skin film. Through the lubricant to process the product wheel slide, it will produce metal soap layer with metal soap, this method can enhance its lubrication effect