Cold galvanized cable tray is to use electrolytic equipment to degrease and pickle the cable tray, and then put it into a solution with zinc salt composition, and connect the negative pole of the electrolytic equipment. A zinc plate is placed on the opposite side of the cable tray, and the positive pole of the electrolytic equipment is connected to the power supply. A layer of zinc will be deposited on the cable tray by using the directional movement of the current from the positive pole to the negative pole. Cold galvanized cable tray is processed first and then galvanized, which has the effect of anti-corrosion.

同重防腐涂料一样，冷镀锌电缆桥架的生产和涂装工程也涉及到环境保护以及施工人员及公众的职业卫生和，因此环境保护也是冷镀锌电缆桥架主要的发展方向。冷镀锌电缆桥架具有优异的性能，主要体现在以下4个方面：

Like heavy anti-corrosion coating, the production and coating of cold galvanized cable tray also involves environmental protection and occupational health and safety of construction personnel and the public, so environmental protection is also the main development direction of cold galvanized cable tray. Cold galvanized cable tray has excellent environmental protection performance, which is mainly reflected in the following four aspects:

(1)成分内不含Ph、cr、Hg等重金属；

(1) The ingredients do not contain Ph, cr, Hg and other heavy metals;

(2)归属于厚膜型材料，触变性能好，经充分搅拌后，少加或不加稀释剂，即可涂装施工。由于冷镀锌固体分含量高达77%，一次无气喷涂可获得较高的膜厚，减少了有机溶剂的挥发量，降低干燥能耗，这些均有利于环境保护。

(2) It belongs to thick film material with good thixotropy. After full mixing, with little or no thinner, it can be coated. As the solid content of cold galvanizing is as high as 77%, one airless spraying can obtain a higher film thickness, reduce the volatilization of organic solvents, and reduce drying energy consumption, which are conducive to environmental protection.

(3)经过测试证明：绝大多数冷镀锌的溶剂和稀释剂内不含甲苯、酮类、卤代烃等毒性大的有机溶剂。

(3) The test shows that most of the solvents and diluents for cold galvanizing do not contain toxic organic solvents such as toluene, ketones and halohydrocarbons.

(4)与热浸镀锌相比，电镀锌工艺更简单，成本更低。冷镀锌电缆桥架是替代热浸镀锌、电弧(热)喷锌的很好材料，对减少三废、降低能耗，提高环境保护的社会效益的作用明显。

(4) Compared with hot-dip galvanizing, the electro galvanizing process is simpler and cheaper. Cold galvanized cable tray is a good material to replace hot dip galvanizing and arc (hot) zinc spraying. It plays an obvious role in reducing three wastes, reducing energy consumption and improving social benefits of environmental protection.

在各种保护钢基体的涂镀方法中，热镀锌是优良的一种。它是在锌呈液体的状态下，经过了相当复杂的物理、化学作用之后，在钢铁上不仅镀上较厚的纯锌层，而且还生成一种锌—铁合金层。这种镀法，不仅具备了电镀锌的耐腐蚀特点，而且由于具有锌铁合金层。还具有电镀锌所无法相比拟的强防腐蚀性。因此这种镀法适用于各种强酸、碱雾气等强腐蚀环境中。

Hot dip galvanizing is an excellent coating method for protecting steel substrate. It is in the liquid state of zinc, after quite complex physical and chemical actions, not only a thick pure zinc layer is plated on steel, but also a zinc iron alloy layer is formed. This plating method not only has the corrosion resistance characteristics of galvanization, but also has a zinc iron alloy layer. It also has strong corrosion resistance that can not be compared with that of electrogalvanizing. Therefore, this plating method is applicable to various strong acid, alkali fog and other corrosive environments.

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