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How to distinguish hot galvanized bridge from galvanized bridge?

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How to distinguish hot galvanized bridge from galvanized bridge?

作者: 南京瑞全电气制造有限公司点击: Release Date: 2018-12-08 Author: Nanjing full-Rui Electric Manufacturing Co., Ltd. Views:

Cable rubber materials are highly elastic, and cables are often repaired and moved. This requires that the coating should have satisfactory resistance to elastic changes. It also requires fire-resistant coatings that have no corrosive effect on rubber cable materials, good adhesion, and cure at room temperature. Good performance, good decorative film. These requirements selected one of the key points of the choice is to deal with the problem of excellent adhesion between the coating and the substrate. In addition, the selected resin base material is modified so that it is blended with various flame retardant additives, which not only has the desired fireproof and heat insulation properties, but also can be used to the environmental conditions of underground wires and cables. In the research of cable fireproof coatings, the resin used not only makes the fireproof coatings have excellent fireproofing effects, but also needs to set sail from the perspective of application. Fireproof coatings are required to have water resistance, acid resistance, alkali resistance, mildew resistance, and cables Corrosion resistance and strong adhesion to the cable substrate.


1. Let's start with the simplest. In terms of color, the appearance of hot-dip galvanized bridge is bright white, and the appearance of galvanized bridge is relatively dark. There is also the flatness of the appearance. The hot-dip galvanized bridge is rougher than the ordinary galvanized bridge after the galvanized layer, and the appearance of the galvanized sheet bridge is relatively flat.


2. Mainly due to different production processes, hot-dip galvanizing is performed in a zinc pot solution, and electro-galvanization is obtained through the reaction of electrodes.


3. Electroplated zinc applied to steel structures is generally not very rust-proof, mainly because the amount of galvanization cannot be reached, and the galvanization is uneven. Generally, rust appears in two or three years, and poor quality is exposed to moisture. It rusted in the environment for more than ten days.

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4. The process of cold galvanizing: the surface of the steel is chemically cleaned and put into a plating solution, which contains zinc oxide. One pole of the direct current is connected to steel, and one pole is connected to a zinc plate placed in a plating solution. After the current is applied, zinc is replaced on the surface of the steel in a molecular state. If the brightening agent is passivated, it will show a colorful cloud-like bright coating.


5. Hot-dip galvanizing process: the process and method of immersing steel or casting in molten zinc liquid to form zinc-iron alloy or zinc and zinc-iron alloy coating on its surface. The hot-dip galvanized coating is thicker, so the corrosion resistance is stronger. Cold galvanized galvanized layer is brighter than hot galvanized, but it is thinner, so the resistance to rust is weak.


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