Steel structure rust removal and painting is an important measure in the anti-corrosion of steel structure, the purpose of which is to remove the rust and oxide scale on the surface of the steel, so that the surface of the steel is exposed to the true color of the metal, and the surface is painted with anti-rust coating, so as to protect the steel from corrosion. Below we will introduce the steps and precautions for derusting and painting steel structures from several aspects.
1. Preparations.
Before you start descaling, you need to prepare the tools and materials you need, including grinders, wire brushes, sandpaper, anti-rust paints, etc. At the same time, it is necessary to check the condition of the surface of the steel structure, and pre-treatment is required for more serious rust and oxide scale, such as grinding, chemical rust removal, etc.
Second, the rust removal steps.
1.Rust removal by hand.
Manual rust removal is the most basic method of rust removal and can be carried out using tools such as wire brushes and sandpaper. Although this method is time-consuming, it is very effective for small areas of rust and rust removal in special parts. Manual rust removal requires attention and direction to avoid excessive wear or scratching of the steel surface.
2.Mechanical rust removal.
Mechanical rust removal is the use of mechanical tools to polish and polish the surface of steel to remove rust and oxide scale on the surface. Common mechanical rust removal methods include sandblasting and shot blasting. Mechanical rust removal has high efficiency and good effect, but it is not effective for thick rust layers.
3.Chemical rust removal.
Chemical rust removal is the use of pickling agents or alkaline lotions to soak or brush the surface of steel to remove rust and oxide scale from the surface. Chemical rust removal is highly efficient and effective, but for some special steels or environmental conditions, it is necessary to pay attention to the selection of chemicals and safety measures.
3. Painting steps.
1.Primer coating.
After the rust is removed from the surface of the steel, the primer needs to be applied. The function of the primer is to increase the adhesion of the anti-rust coating and improve the anti-corrosion performance of the whole coating. The primer needs to be applied evenly and completely, without omission or accumulation.
2.The top coat is painted.
The role of the topcoat is to directly isolate the external environment, so it needs to have good weather resistance, corrosion resistance and decoration. The topcoat should be uniform, smooth, and consistent in color, and there should be no bubbles, cracks, etc.
4. Precautions.
1.In the process of rust removal and painting, it is necessary to pay attention to safety measures, such as wearing masks, gloves and other protective equipment, to avoid the harm of chemicals to the human body.
2.For different materials of steel, it is necessary to choose suitable rust removal and painting methods to avoid excessive wear or corrosion of the steel.
3.In the process of painting, it is necessary to pay attention to the influence of environmental conditions such as temperature and humidity to avoid bubbles and falling off of the coating.
4.During the construction process, care needs to be taken to protect the completed parts from contamination or damage.
5.After the painting is completed, quality inspection and acceptance are required, and the unqualified parts need to be repaired or repainted.
In short, steel structure rust removal and painting is an important anti-corrosion measure, which needs to be taken seriously to every link and detail to ensure that the construction quality meets the requirements. At the same time, for different materials and different environmental conditions, suitable rust removal and painting methods need to be selected to protect the steel from corrosion to the greatest extent. 
In short, steel structure rust removal and painting is an important measure, which needs to be taken seriously to every link and detail to ensure that the construction quality meets the requirements. At the same time, for different materials and different environmental conditions, suitable rust removal and painting methods need to be selected to protect the steel from corrosion to the greatest extent.