Guardrail net, isolation fence, fence how to prevent corrosion

Guardrail anti-corrosion method has a lot to do with the service life of the fence, the senior engineer said: Generally speaking, the service life of the road guardrail net is about 10 years, some small manufacturers without scale, occupy the market at a low price, in order to reduce the cost of the production of the isolation fence shoddily, the use of time in 3-4 years, can not meet the use requirements. Here we tell our customers, so the purchase of railway isolation fence must choose a professional manufacturer, resolutely can not buy cheap products of poor quality. Fence is also known as: isolation fence, it is a metal mesh taut on the support structure of the fence, to prevent people and animals from entering the highway.

Isolation grilles shall be installed on both sides of expressways and Class I motorways. And prevent non-legal encroachment on highway land. One of the anti-corrosion methods of guardrail mesh: dipping, and now the more mature dipping method in China is: powder dipping method, which originated from the fluidized bed method, the so-called fluidized bed was initially applied to the oil contact decomposition on the Winkler gas producer, and then developed the solid-gas two-phase contact process, and gradually used for metal coating. So it is sometimes still called "fluidized bed coating method", the actual process is to add the powder coating to the porous container (flow tank) at the bottom, and the blower is sent from the bottom to the treated compressed air, so that the powder coating turns to reach the "fluidization state". Becomes a evenly distributed fine powder. We know that the fluidized bed is the second stage of the solid flow state (the first stage is the fixed bed stage, the second stage is the air flow transport stage), on the basis of the fixed bed continue to increase the flow rate (W), the bed begins to expand and loosen, the bed height begins to increase, each powder particle is floated, and thus leaves the original position for a certain degree of movement, then it enters the fluidized bed stage. Section bc shows that the powder layer in the fluidized bed expands, its height (I) increases with the increase of gas velocity, but the pressure in the bed (△P) does not increase, and the flow rate changes within a certain range without affecting the unit power required by the flow body, which is the characteristic of the fluidized bed, and it is the use of this characteristic to carry out the coating process. The uniformity of powder fluidization state in fluidized bed is the key to ensure the uniformity of coating film. The fluidized bed used in powder coating belongs to "vertical fluidization", and the fluidization number must be found out by test, generally to be able to coat, and the suspension rate of the powder in the fluidized bed can reach 30 ~ 50%.

Railway isolation grid, municipal isolation grid and bilateral isolation grid are all deoiled and preheated to the melting point of powder coating. After dipping into the fluidized bed, the plastic powder will adhere uniformly, and then plasticize the polymer crosslinked flow into steel-plastic composite products.