Preventive measures and causes of space frame structure corrosion

   Because the space frame structure is made of steel, it is more susceptible to the influence of the natural environment and the paint during production and processing, which leads to corrosion of the space frame structure. The corrosion of the space frame structure first affects the use time, and secondly affects the space frame structure. The overall appearance is beautiful. If the space frame structure is severely corroded, it is likely to cause partial collapse and cause damage to life and property. Therefore, preventive measures for space frame structure corrosion are very important. The following is the editor based on years of experience, summed up several reasons and preventive measures about the corrosion of the space frame structure. 

   1. Reasons for corrosion of large space frame structure 

   The aging of the space frame structure paint is an important factor that affects the corrosion of the space frame structure. No matter what kind of material, there are basically aging characteristics, and anti-corrosion coatings will also have aging problems. 

   It is the aging problem of this kind of coating that makes the steel structure, and the failure of the anti-corrosion coating, which in turn causes the space frame structure to corrode and rust, and affect its life. It is also due to the natural environmental factors surrounding the grid structure. If the air around the grid structure is relatively humid, it will definitely cause the space frame structure to gradually rust under the erosion of water and air. Among them, the content of corrosive and harmful components such as carbides, nitrides, and sulfides in the polluted atmosphere will also affect the service time of the space frame structure.

   For the maintenance of the space frame structure, it is necessary to pay attention to it. It is best to be coated with a layer of film. At the same time, the anti-corrosion paint needs to be painted after a period of time, so that it can be used for a long time. 

   2. Anti-corrosion measures for large space frame structure 

   Space frame's structure surface treatment: the surface treatment of the space frame structure is very important, the same paint, the same corrosive environment, the use of different construction time can be extended by three to five times. The dirt and rust layer on the surface of steel should be removed, especially the black oxide scale formed when rolling steel. It is the cathode of electrochemical corrosion and the source of corrosion that must be removed. The surface treatment quality should reach the Sa2.5 level of the steel surface pretreatment specification before painting.

   Material selection: The surface coating of special steel structure anti-corrosion paint during space frame processing is still the main method of anti-corrosion of steel structure and space frame. Steel structure anticorrosive coatings can be divided into primers, middle coats and top coats according to their protective functions. Each layer of paint has its own characteristics and each has its own responsibility. Several layers are combined to form a composite coating, which improves the anticorrosion performance and prolongs the use time. 

   Coating thickness: Paint is an anti-corrosion intermediate material and must be painted to form a coating. If the thickness of the coating is uneven, the burrs on the steel surface or the peaks of anchor spinning will expose the coating. If the number of coating applications is small and the coating has pinholes, oxygen, chloride ions, and water molecules in the water will pass through these weak places, causing the steel to rust and corrode. The corrosion products expand in volume to form a rust bag, which gradually expands, and the coating blisters and falls off.