Long-term exposure of steel and other metal materials to the atmosphere will inevitably lead to corrosion, forming loose rust, and causing serious losses to modern industry.
At present, pipelines play an important role in various industries, so the surface treatment of steel pipes is also one of the factors that determine the service life of pipelines. It is the premise for whether the anti-corrosion layer and the steel pipe can be fastened together. According to the verification of research institutions, the life of the anti-corrosion layer depends on the type of coating, the quality of the coating, and the construction environment. In addition to the above factors, the surface treatment of steel pipes accounts for about 50% of the life of the anti-corrosion layer. From this, we can know the importance of surface treatment of steel pipes. To continuously improve the surface treatment methods, our company lists the following common methods for rust removal of steel pipes in the market. How to remove rust from steel pipes? What is a good method for surface treatment of steel pipes? You can compare which method is more suitable for you.
First, cleaning.
Cleaning is a method of using a chemical agent to remove dirt from the surface of an object. It uses the surface pollutants or covering layers of the cleaning agent to chemically transform, dissolve, and peel off to achieve the effects of degreasing, rust removal, and decontamination. The disadvantage is that it can not really remove the rust, scale, etc. on the surface of steel, so it can only be used as an auxiliary method in the process of anti-corrosion and rust removal.
Second, use tools to remove rust.
Tool rust removal mainly uses a wire brush to grind the surface of steel pipes and steel materials, which can remove loose or raised scales, welding slag, rust, and other surface treatments. The rust removal of manual tools can reach the rust removal level Sa2, and the rust removal of power tools can reach the rust removal level Sa3. If the surface attachments of the steel are firm, the rust removal of the tool cannot achieve the ideal effect and cannot meet the anchor depth required for anti-corrosion construction.
Third, pickling.
A long time ago, a method of rust removal was used more frequently, usually using chemical and electrolytic methods for pickling. Pickling can remove scale, rust, and old coatings. Sometimes it can be used as a secondary treatment after sandblasting and rust removal. Chemical pickling can make the surface reach a certain degree of cleanliness and roughness, but the anchor pattern is shallow and causes environmental pollution, exceeding the national environmental protection indicators.
Fourth, mechanical equipment-rust removal of steel pipe shot blasting machine.
The method of rust removal surface treatment of steel pipe shot blasting machine is to project the shot (steel sand or sand grains) onto the surface of the workpiece at a high speed and a certain angle, letting the shot impact the surface of the steel pipe, and then repeat the shot circulation system inside the machine. This method can not only completely solve the rust removal oxide and pollution of steel pipes, but also achieve the required uniform roughness under the violent impact and friction of the abrasive of the steel pipe. This surface treatment method has the advantages of low cost, high efficiency, economic and environmental protection, mechanization, and a high degree of intelligence.
Post time: Sep-10-2024