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How to distinguish between electric galvanizing and hot dip galvanizing?

First. the difference between electric galvanizing and hot dip galvanizing

1. The two principles are different: electric galvanizing, also known as cold galvanizing, is attached to the surface of the steel by electrochemical method;

Hot dip galvanizing, also known as hot dip zinc and hot dip galvanizing, is to soak the steel in the zinc liquid, so that the steel surface is attached with galvanized layer, forming a layer of intermetallic compounds on the surface of the raw material. It is an effective way of metal corrosion prevention, mainly used in various industries of metal structure facilities.

2. The two appearance is different: the appearance of electric galvanizing is smooth and bright, and the electroplating of color passivation process is yellow-green as the main color, which is colorful.

The appearance of hot dip galvanizing is slightly rough than that of electric galvanizing, silver white, and the appearance is easy to produce process water lines, especially at one end of the workpiece.

3. The thickness of the two is different: the zinc layer of electric galvanized is relatively thin, only about 3-5um thickness. Although the surface is smooth, it will have gray and dirty performance, good processing performance and insufficient corrosion resistance.

The zinc layer of hot dip galvanized itself is relatively thick, generally more than 10um thickness, so it has good corrosion resistance. Although the surface is bright, it is slightly rough, and there may be zinc flowers.

Galvanized is suitable for indoor ordinary humid, general corrosion environment; Hot-dip galvanized bridge is suitable for outdoor or seaside environment with strong corrosion.

Two. the characteristics of electric galvanizing: the purpose of electric galvanizing is to prevent steel objects from being corroded, improve the corrosion resistance and service life of steel, but also make the product increase the decorative appearance, steel with the growth of time will be weathering, water or soil corrosion. Domestic annual corrosion of steel almost accounts for one tenth of the total amount of steel, so, in order to protect the service life of steel or its parts, generally use galvanizing to iron and steel processing.

The characteristics of hot dip galvanized: excellent anti-corrosion performance, long service life, much longer than the ordinary bridge life, high degree of production industrialization, stable quality. Therefore, it is widely used in outdoor environment where atmospheric corrosion is serious and maintenance is difficult.

Three. how to prevent rust of steel

In addition to the way of electroplating, hot plating steel rust treatment, we also brush on the surface of steel rust oil to achieve a good rust effect. To avoid steel rust, we also need to pay attention to the storage place of steel, for example, do not store steel in a damp and dark space for a long time, do not directly put the steel on the ground, so as not to invade the steel moisture. Do not store acidic goods and chemical gases in the space where steel is stored. Otherwise, it is easy to corrod the product.


Zhishang Steel Co., Ltd

ABOUT USOverviewThe company mainly deals in color-coated, galvanized, stainless steel pipes, stainless steel coils, stainless steel plates of various materials; hot-rolled series of rebar, medium and heavy plates, coils, I-beams, angle steels, channel steels, H-beams and other steel products and deep processing Service. (The company’s annual invent···

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