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根据镀锌工艺的不同，热镀锌槽钢可分为热浸锌槽钢和热吹镀锌槽钢，将除锈后的钢件浸入到440~460℃左右熔融的锌液中， 使钢构件表面附着上锌层，进而起到防腐蚀作用。通常情况下，锌层表面形成一层非常薄且致密的氧化锌层，它很难溶于水， 因而对槽钢有一定的保护作用。当空气中的氧化锌与空气中的其他成分形成不溶性锌盐时，防腐蚀效果更好。 槽钢的耐蚀性主要取决于镀锌层的厚度，在槽钢表面涂覆一层较厚的纯锌层，可避免槽钢基体与各种腐蚀溶液的接触， 具有很强的抗腐蚀能力，保护槽钢不受腐蚀，并能长时间与钢结构牢固粘接，防止表面受到损伤。 锌在干燥的空气中不容易改变，而在潮湿的空气中，锌层可以形成非常致密的镀锌薄膜，具有较强的耐腐蚀性。 液态锌经过一系列复杂的物理、化学作用后，在槽钢上镀上较厚的锌层，并形成了一层锌-铁合金。这一镀法， 不但具有耐腐蚀的特性，而且具有铁-锌合金层的结合致密，在海洋性盐雾大气和工业大气中显出独特的抗腐蚀性， 适用于各种强酸、碱雾等强腐蚀环境。为使槽钢具有一定的抗腐蚀性能，并同时让产品外观上有装饰效果， 通常采用镀锌的方法对其进行表面处理。 According to the different galvanizing process, hot galvanized tank steel can be divided into hot dip zinc tank steel and hot blow galvanized tank steel, the rust steel parts into about 440~460℃ molten zinc liquid, so that the surface of steel members attached to zinc layer, and then play an anti-corrosion effect.Usually, the zinc layer surface forms a very thin and dense zinc oxide layer, which is difficult to dissolve in water, so it has a certain protective effect on the tank steel. The protection is better when zinc oxide forms insoluble zinc salts with other components in the air. The corrosion resistance of tank steel mainly depends on the thickness of the galvanized layer. Putting a thick pure zinc layer on the surface of tank steel can avoid the contact between the substrate of tank steel and various corrosion solutions, have strong corrosion resistance, protect the tank steel from corrosion, and can firmly bond 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 wet air, the zinc layer can form a very dense galvanized film, with strong corrosion resistance.After a series of complex physical and chemical actions, liquid zinc plates a thick zinc layer on the tank steel and forms a layer of zinc-ferroalloy.This plating method, not only has the characteristics of corrosion resistance, but also has the combination of iron-zinc alloy layer dense, in the Marine salt fog atmosphere and industrial atmosphere show a unique corrosion resistance, suitable for a variety of strong acid, alkali fog and other strong corrosion environment.In order to make the trough steel have a certain corrosion resistance, and make the product appearance have decorative effect, the surface treatment is usually used by galvanizing method.
热浸镀锌槽钢8号
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槽钢热浸锌加工
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