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Corrosion Protection Processes and Quality Control for Steel Structures

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 Corrosion Protection Process for Steel Structures Corrosion protection processes for steel structures are essential for ensuring that steel structures remain in good condition over the long term. This article provides a detailed overview of the various steps involved in these processes, including surface preparation, priming, coating application, quality control, and final inspection and acceptance. Surface treatment Surface preparation is the first step in the corrosion protection process. Its primary purpose is to remove dirt, grease, rust, and other contaminants from the surface of steel structures to improve coating adhesion and corrosion protection. Surface preparation includes the following steps: Cleaning: Removing grease, dirt, and dust from the surface of steel structures using solvents or detergents. Degreasing: Removing grease and wax-like substances with an alkaline degreaser to improve coating adhesion. Rust Removal: Removing rust and other corrosion products from the...
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Space frame installation technology overview

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 The rods can be made of a variety of materials, mainly steel pipes or profiles. This structure appeared in Europe before the Second World War, but the real large-scale application came after the war. At that time, the space frame structure replaced the reinforced concrete structure in many occasions with its factory production, on-site installation, convenient construction, labor saving and other advantages.

The vigorous development of the space frame structure is due to its series of advantages. The first is that the space frame can play a spatial role, because all the rods can participate in the work and have good mechanical performance, its stiffness and integrity are better than the general plane structure, and can effectively withstand a variety of asymmetric loads, concentrated loads and dynamic loads. The overall force of all the bars in the space frame also shows its excellent anti-seismic characteristics under earthquake action. Secondly, the production and installation of the space frame structure is more convenient. Rods and nodes can be produced in the factory, so that the on-site workload is reduced to a low level, and there is no need for complex technology, which is convenient for the construction of the space frame frame industrialization, in addition, China has also created some simple and effective installation methods in the construction of the space frame frame, and there are professional construction teams for installation.

In China, the first space frame structure was first used on the roof of the ball hall of Shanghai Normal Fan University in 1964, the 31.5m×40.5m size of the space frame welded with Angle steel, which set off a new page in the history of China's spatial structure. After more than 20 years of development, the space frame structure has been spread all over the country and has become a main form of roof structure.



Because the construction of the space frame structure is more complex than the general plane structure, because it can not play a spatial role before being assembled into a whole, the space frame structure has been gradually promoted in the large-span stadium, and a variety of installation methods have been used in the construction, and a series of installation technologies with Chinese characteristics have been created. For example, Shanghai Stadium local assembly, overall lifting, high-altitude displacement installation methods, in the 1970s, there were divided production, high-altitude slip assembly, local assembly, overall lifting and other installation methods. The improvement and innovation of these methods have played a strong role in promoting the further application of the space frame frame on the large and medium span roof.

In the 1980s, when Tangshan was rebuilt after the earthquake disaster, the seismic performance of the space frame was considered to be better than that of the general plane structure. In Tangshan gear factory joint workshop, Tangshan locomotive and rolling stock factory, bus assembly workshop and other projects have adopted tens of thousands of square meters of space frame structure. Entering the 1990s, large-scale space frame structures in industrial plants are more common, and their scale is also rapidly increasing.

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What are the differences between bolted ball grids and welded ball grids?

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