What is the difference between electrostatic spraying and painting for guardrails?

Powder electrostatic spraying process:

First, the surface treatment of the steel is carried out in the early stage, such as degreasing, surface conditioning, hot-dip galvanizing, cleaning, phosphating, and drying. These series of pre-processes mainly play a role in removing rust, removing impurities, and not only removing the inducements of steel that are easy to rust. It also produces a zinc layer and a phosphate film on the surface of the steel, which protects the steel from being corrosion and rust, and the phosphate film makes the powder adhesion stronger when the steel surface is powder-coated.

After the pre-treatment of the steel, the equipment composed of spray gun, spray cup and spraying high-voltage power supply is used, and the negatively charged paint particles are used to make the negatively charged paint particles move in the opposite direction of the electric field, and then are adsorbed on the surface of the steel to be coated. A high-performance electrostatic spraying machine is used to complete the spraying, and the shielding of electrostatic electricity is used to achieve the effect of powder adhesion. The powder coating on the surface of the steel is heated to a specified temperature (180 -220) and kept warm for a corresponding time, so that it can be melted, leveled and cured, so as to obtain the surface effect of the guardrail product we want.

Electrostatic spraying has a wide range of applications, not only in the fence industry, but also in the automotive industry and metal products industry. Also in the insulation industry, such as wood, rubber, etc. have also been widely used. Its surface color is gorgeous, smooth, can achieve special layers and feel, is not easy to fall off, and has excellent weather resistance.

The assembly-line production of the guardrail industry has been realized, and the quality of products and the investment of labor costs have been improved.

Painting process: The use of painting process also needs to carry out preliminary treatment of steel, the general process is pickling (or shot blasting) - degreasing - phosphating - washing - natural drying - putty - primer spraying - topcoat spraying - natural drying. The traditional middle coating and topcoat lines use manual air spraying technology, generally using non-assembly line operations, which are sensitive to the external climate and cannot be constructed on rainy days, and are suitable for multi-variety and low-volume production.

The flexibility of the painting process is better than that of powder spraying, but the spraying effect is relatively rough, the weather resistance of the layer is short, and the excess paint can not become environmental pollution.

Electrostatic spraying guardrail, the base material is hot-dip galvanized steel pipe.

Hot-dip galvanizing: plays an electrochemical protection role to prevent rusting of steel substrates from the inside out.

The surface is electrostatically sprayed to make the zinc steel guardrail (

The product has good self-cleaning performance.

Electrostatic spraying mainly refers to the appearance color of the guardrail, which is different from the traditional paint, dipping, new chrome plating, transfer printing, etc.

The process means that the workpiece to be sprayed is the positive electrode and the powder is the negative electrode; The principle of positive and negative attraction is used to evenly spray the powder on the surface of the workpiece, and then bake at high temperature (between 180-220) to form a coating fixed on the surface of the powder.

Generally speaking, electrostatic spraying must go through certain treatment procedures before spraying, such as phosphating, etc.