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热镀锌槽钢，按镀锌工艺的不同可以分为热浸锌槽钢和热吹镀锌槽钢，是将除锈后的钢件浸入440~460℃左右融化的锌液中， 使钢构件表面附着锌层，从而起到防腐的目的。在一般大气中，锌层表面形成一层很薄而密实的氧化锌层表面，它很难溶于水， 因此对槽钢起着一定保护作用。槽钢耐蚀性主要决定于镀锌层的厚度，将较厚致密的纯锌层覆盖在槽钢表面上， 可以避免槽钢基体与任何腐蚀溶液的接触，耐腐蚀能力非常强，保护槽钢免受腐蚀，又能够长期与钢结构牢固粘接在一起， 防止表面受到损伤。锌在干燥空气中不易发生变化，而在潮湿的空气中，表面能生成一种很致密的镀锌薄膜， 经过镀锌处理之后的槽钢的表面会非常美观，而且还有着较强的抗腐蚀性。在锌呈液体的状态下，经过了相当复杂的物理、 化学作用之后，在槽钢固件上不仅镀上较厚的锌层，而且还生成一种锌—铁合金层。 Hot galvanized tank steel, according to the different galvanized process can be divided into hot dip zinc tank steel and hot blow galvanized tank steel, is the rust steel parts into about 440~460℃ of melted zinc liquid, so that the surface of the steel members attached to zinc layer, so as to play the purpose of anti-corrosion.In the general atmosphere, the surface of the zinc layer forms a very thin and dense zinc oxide layer surface, which is difficult to dissolve in water, so it plays a certain protective role in the trough steel.The corrosion resistance of tank steel is mainly determined by the thickness of galvanized layer, the thick and dense pure zinc layer covered on the surface of tank steel, can avoid the contact between tank steel substrate and any corrosion solution, corrosion resistance is very strong, protect the tank steel from corrosion, and can be firmly bonded with the steel structure for a long time, to prevent the surface from damage.Zinc is not easy to change in dry air, and in humid air, the surface can produce a very dense galvanized film, after the galvanized treatment of the tank steel surface will be very beautiful, and there is a strong corrosion resistance.In the state of liquid zinc, after quite complex physical and chemical action, the tank steel firmware is not only plated on the thick zinc layer, but also produces a zinc-iron alloy layer.
钢结构工程用轻型槽钢
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佛山现货黑料槽钢
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