How to effectively avoid rusting of hot-dip galvanized bolts
Release Time:
2022-10-21
Hot-dip galvanized bolts are a relatively good anti-rust surface, but in the face of weathering and corrosion in nature, rust appears. In order to avoid this phenomenon, the following measures will be taken.
Hot-dip galvanized bolts are a relatively good anti-rust surface, but in the face of weathering and corrosion in nature, rust appears. In order to avoid this phenomenon, the following measures will be taken.
First of all, we need to pack the hot-dip galvanized bolts after galvanizing. Reasonable selection of packaging methods can effectively avoid rust and extend the life of the use. Such as galvanized iron sheet metal is the best, the box can be placed in a desiccant with the right amount of humidity to reduce the relative humidity compatible to reduce and prevent harmful gas storeroom erosion.
In order to prevent the anti-corrosion treatment of non-standard screws, it is already degreased, and the rust-proof screws and nuts in the rust-removing and anti-corrosive agent tank swim freely, or the zinc and chromium compounds are used to form a protective film on the metal surface, forming a spray method, and drying and cooling And then repeat the process once more.
Phosphate treatment is a chemical treatment of phosphate containing metal to metal surface to form a phosphate protective film. Phosphating treatment solution is insoluble in water and has excellent adhesion of phosphate film as its main purpose. Bottom layer and coating Cold-adsorbed lubricant metal layer. Since the phosphate coating is composed of a series of different sizes of zinc, manganese, hydrogen phosphate and iron phosphate crystals, the film is porous, has a large specific surface area, has a good absorption, an adsorbed coating or a large amount of lubricant It is often used as a primer, or cold stamping to reduce friction and lubricating layers of steel and cold drawn steel wires
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What are the classification and use of high-strength bolts?
High-strength bolts are special bolts made of high-quality carbon steel or low-alloy steel. They are called high-strength bolts because of their high strength. High-strength bolt connections have the advantages of simple and fast installation, good mechanical performance, assembly and disassembly, high pressure bearing, safety and reliability, etc. High-strength bolts are a new type of steel structure connection method developed after riveting connection, and have now developed into one of the main means of steel structure connection today. 1. Classification of high-strength bolts High-strength bolts can be divided into two types: large hexagonal head type and torsion shear type in appearance; if they are divided into 8.8, 10.9, 12.9, etc., according to the performance grade, the large hexagonal head high-strength bolts currently used in our country have 8.8 and 10.9 grades, while the torsion shear type high-strength bolt strength bolt is only 10.9 grades. The large hexagonal head high-strength bolt connection pair consists of a bolt, a nut and two washers (the screw head and the nut each have a washer): the torsion shear type high-strength bolt connection pair consists of bolts, nuts and washers. When bolts, nuts and washers form a connection pair, their performance levels must match. 2. According to the connection method, high-strength bolts can be divided into three types: friction connection, tensile connection and pressure connection. Friction connection and pressure-bearing connection are both shear connection. Bolt friction connection trans
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