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热镀锌槽钢镀锌工艺

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【 发布于:2018-03-21 16:12:53 】


槽钢经过热镀锌处理后防腐性会更好,适应环境更加广泛。济南镀锌管被广泛运用与电力铁塔、通信铁塔、铁路、公路防护、路灯杆、船用构件、建筑钢结构构件、变电站附属设施、轻工业等行业。一般根据习惯按镀前处理方法的不同把热镀锌工艺分为线外退火和线内退火。

After hot galvanizing, the anticorrosion of channel steel will be better and the environment is more widely used. Ji'nan galvanized pipe is widely used in power tower, communication tower, railway, highway protection, street lamp pole, marine components, building steel structural components, substation auxiliary facilities, light industry and other industries. Generally, the hot-dip galvanizing process is divided into external annealing and intra line annealing according to the different methods of pre plating treatment according to the habit.

济南镀锌管

1、线外退火

1, out of line annealing

线外退火就是热轧或冷轧钢进入热镀锌作业线之前,首先在抽底式退火炉或罩式退火炉中进行再结晶退火。因为钢材在热镀锌之前必须保持一个无氧化物和其他脏物存在的洁净的纯铁活性表面。这种方法是先由酸洗的方法把经退火的表面氧化铁皮清除,然后涂上一层由氯化锌或由氯化铵和氯化锌混合组成的溶剂进行保护,从而防止钢材再被氧化。

Before the line annealing is the hot or cold rolled steel entering the hot-dip galvanizing line, the recrystallization annealing is carried out in the bottom annealing furnace or the bell type annealing furnace. Because the steel must maintain a clean pure iron active surface without oxide and other dirt before hot dip galvanizing. This method is to remove the annealed iron oxide scales first by acid washing, and then coat a layer of zinc chloride or a mixture of ammonium chloride and zinc chloride to protect them, so as to prevent the steel from being oxidized again.

2、湿法热镀锌

2. Wet hot dip galvanizing

济南镀锌管钢材表面的溶剂不经烘干就进入起表面覆盖有熔融态溶剂的锌液进行热镀锌。此方法的缺点是:只能在无铅状态下镀锌,镀层的合金层很厚且粘附性不好;生成的锌渣都积存在锌液和铅液的界面处而不能沉积锅底,这样钢材因穿过锌层污染了表面。

The solvent of the surface of the galvanized steel tube of Ji'nan has been hot-dip galvanized by the zinc solution, which covers the surface with molten state solvent without drying. The disadvantage of this method is: only lead-free status under the galvanized coating alloy layer is very thick and poor adhesion; generation of zinc are accumulated in the interface of liquid zinc and lead liquid can not be deposited on the bottom, so steel through the zinc layer surface pollution.

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