The formation process of hot-dip galvanizing layer is the process of forming an iron-zinc alloy between the iron matrix and the outermost pure zinc layer. The iron-zinc alloy layer is formed on the surface of the workpiece during hot-dip plating, which makes the iron and pure zinc layers very close. Good combination, the process can be simply described as: when the iron workpiece is immersed in the molten zinc liquid, a solid solution of zinc and α-iron (body center) is first formed on the interface. This is a crystal formed by dissolving zinc atoms in the base metal iron in a solid state. The two metal atoms are fused, and the gravitational force between the atoms is relatively small. Therefore, when zinc reaches saturation in the solid solution, atoms of zinc and iron diffuse into each other. The zinc atoms that diffuse into (or penetrate into) the iron matrix migrate in the matrix lattice and gradually form an alloy with iron. The iron in the molten zinc liquid forms an intermetallic compound FeZn13 with zinc, which sinks to the bottom of the hot-dip galvanizing pot and becomes zinc slag. When the workpiece is removed from the zinc immersion solution, a pure zinc layer is formed on the surface, which is a hexagonal crystal. Its iron content is no more than 0.003%.
Editorial:2024-05-07
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Ground photovoltaic support system Common ground photovoltaic systems generally adopt the form of concrete strip (block) foundation. Challenges faced by solar photovoltaic bracket design, module assembly components of any type of solar photovoltaic bracket design. The most important feature is weather resistance. The structure must be strong and reliable, able to withstand atmospheric erosion, wind load and other external effects, safe and reliable installation, achieve maximum use results with minimum installation cost, almost maintenance-free, and reliable repairs. These are all required when making a choice. Important factors considered, highly wear-resistant materials were applied in the solution to resist wind, snow loads and other corrosive effects. Comprehensive use of aluminum alloy anodizing, ultra-thick hot-dip galvanizing, anti-UV aging and other technical processes to ensure the service life of the solar bracket and solar tracker. Currently, the commonly used photovoltaic support foundation forms at home and abroad are cement foundation type and spiral ground pile type. Cement-based photovoltaic supports usually use independent foundations or strip foundations, and are produced in two ways: prefabricated or cast-in-place. Its advantages are that it uses less steel and is basically not restricted by geological conditions. The photovoltaic supports have excellent anti-corrosion performance and are safe. The hidden danger is small.Next:
Generally, the ring lock scaffolding consists of vertical poles, horizontal poles, vertical diagonal poles and some small accessories. Each accessory can have different product sizes and specifications according to different needs. 1.Pole The vertical pole is welded with a disc, and there are eight holes on the disc, four of which are small holes for the horizontal pole and four holes for the inclined pole. Vertical poles are generally made of materials such as Q355B, Q355, Q235, etc., with lengths ranging from 0.2 meters to 3.0 meters. The surface generally adopts hot-dip galvanizing and painting processes. 2. Crossbar Adopting a standardized self-locking latch design, the crossbar joint is particularly dependent on the arc manufacturing of the tube and is in positive contact with the vertical pole steel pipe. After the latch is tightened, it is stressed at three points, which can be firmly fixed and the structural strength of the Zeng family is transmitted. horizontal force. Fully automatic professional welding process, length ranging from 0.3 meters to 3 meters.
