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如何区分热镀锌钢管和镀锌钢管?

来源:http://www.jnxxjm.com

【 发布于:2018-01-17 13:04:46 】


热镀锌管是使熔融金属与铁基体反应而产生合金层,从而使基体和镀层二者相结合。热镀锌是先将钢管进行酸洗,为了去除钢管表面的氧化铁,酸洗后,通过氯化铵或氯化锌水溶液或氯化铵和氯化锌混合水溶液槽中进行清洗,然后送入热浸镀槽中。

The hot-dip galvanizing tube is to make the molten metal react with the iron matrix to produce the alloy layer, so that the matrix and the two layers of the coating are combined. Hot dip galvanizing is to pickle steel pipes first, then remove iron oxides on the surface of steel pipes, then pickle them, then clean them through ammonium chloride or zinc chloride water solution or ammonium chloride and zinc chloride mixed water solution tank, then send them into hot dip bath.

热镀锌具有镀层均匀,附着力强,使用寿命长等优点。钢管基体与熔融的镀液发生复杂的物理、化学反应,形成耐腐蚀的结构紧密的锌一铁合金层。合金层与纯锌层、钢管基体融为一体,故其耐腐蚀能力强。

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Hot dip galvanizing has the advantages of uniform coating, strong adhesion, long service life and so on. The complex physical and chemical reactions occurred between the steel tube matrix and the molten plating bath to form a corrosion-resistant and tightly structured zinc - iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel tube matrix, so its corrosion resistance is strong.

冷镀锌就是电镀锌,镀锌量很少,其本身的耐腐蚀性比热镀锌管相差很多。正规的镀锌管生产厂家,为了保证质量,大多不采用电镀锌,只有那些规模小设备陈旧的小企业采用电镀锌,当然他们的价格也相对便宜一些。

Cold galvanizing is electrogalvanizing, with little galvanizing, and its corrosion resistance is much different from that of hot galvanized pipe. Regular galvanized pipe manufacturers, in order to ensure quality, most of them do not use zinc plating. Only those small and old equipment, old and small businesses use zinc plating, of course, their prices are relatively cheaper.

目前不准用冷镀锌管作水、煤气管。锌层是电镀层,锌层与钢管基体独立分层。锌层较薄,锌层简单附着在钢管基体上,容易脱落。故其耐腐蚀性能差。在新建住宅中,禁止使用冷镀锌钢管作为给水管。

At present, cold galvanized pipes are not allowed to be used as water and gas pipes. The zinc layer is electroplating layer, and the zinc layer and the steel tube matrix are stratified independently. The zinc layer is thinner and the zinc layer is simply attached to the steel tube matrix, which is easy to fall off. Therefore, its corrosion resistance is poor. In newly built houses, cold galvanized steel pipes are forbidden to be used as water pipes.

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