Guardrail surface treatment methods

General guardrail surface treatment methods are the following:

1. Galvanizing, removing steel surface oxide, alloy layer coated with zinc layer, to avoid the contact between steel matrix and any corrosion candle solution, and difficult to water, to achieve the ideal anti-corrosion effect.

2. Clean, clean galvanized steel, remove surface ash layer and dirt.

3. Debinding, physical debinding of steel using alkaline solution to remove cross-rolled oil, oil and iron powder.

4. Zinc-rich phosphating, chemical and electrochemical phosphate chemical phosphating film to provide protection to the base metal, to a certain extent, to prevent metal corrosion;.

5. Electrostatic spraying, steel pre-treatment, the use of spray gun, Spray Cup and spray high-voltage power equipment, the use of high-voltage electrostatic field negative paint particles around the electric field in the opposite direction of the directional movement, it is then adsorbed on the surface of the steel.

The Fence Net Column Foundation adopts the manual excavator or the Foundation Pit excavator to carry on the excavation. The steel pipe of the upper column is sheathed in the upper end of the steel pipe of the lower column, and a bolt runs through it to connect the steel pipe of the upper column with the lower column. By strengthening the lower column, that is, using casing or other technology to prevent the deformation of the lower fence column, and at the same time to the upper column local or all weakened to control the deformation of the fence column position, although the force arm is reduced, the section bending modulus is also reduced, thus ensuring that the anti-collision grade is not lower than the original standard design. The metal wire of highway guardrail net is made into mesh products by certain technical methods. With copper wire, stainless steel wire, iron wire, steel wire for raw materials woven. Most wires are 4-0.025 mm in diameter. Plain weave, twill weave and mat weave are generally used. Metal screen hole clear and correct, flat screen, high temperature resistance, wear resistance and other characteristics, stainless steel screen can also be corrosion resistance. Therefore, the metal screen is used for powder screening and oil filtration. Stadium fence is different from the general mesh products, but a strict series of mesh size, and the object particles classification, screening function in line with the industry, institutions, standards recognized mesh products. Screen does not talk about"Mesh number", "Mesh number" is just a habit of people to describe the screen, it is difficult to overcome, it is different from the general mesh products, is that it has a strict mesh size, rather than"Mesh number". Its size is not isolated, it has a series of mesh size composition, the goal is to grade screening. The application fields of screen mesh are all over industry, agriculture, science and technology, national defense.