1、 Hot dip galvanizing process

锌具有耐腐蚀性，浸锌作为一种献身阳来保护阴金属的方法，寿数取决于它的腐蚀锌镀层的阻力和腐蚀速度。热浸锌的锌层厚度一般在6μm以上，锌与铁的结合面构成一层锌铁合金，进步了锌层的粘附性。国外对各类不一样环境前提下的热浸镀锌层进行了大气显露试验，从检验效果来看，热浸锌能够满意电缆桥架运行寿数的要求。

Zinc has corrosion resistance, and as a method of sacrificing yang to protect negative metals, the lifespan of zinc immersion depends on the resistance and corrosion rate of its corroded zinc coating. The zinc layer thickness of hot-dip galvanizing is generally 6 μ Above m, the interface between zinc and iron forms a layer of zinc iron alloy, which improves the adhesion of the zinc layer. Foreign countries have conducted atmospheric exposure tests on hot-dip galvanized coatings under different environmental conditions. From the inspection results, hot-dip galvanizing can meet the requirements for the operating life of cable trays.

因为热浸锌具有耐腐蚀性、高功用和比，因此热浸锌钢桥被广泛运用于国内外。热浸锌不易变形等问题，需要在电缆桥架的构造上及浸锌技术上加以思考。别种涂层的桥架抗紫外线才干差，容易引起锈蚀，构成大面积涂层起泡脱皮，一般不适合户外运用。

Due to its corrosion resistance, high performance, and price ratio, hot-dip galvanized steel bridges are widely used both domestically and internationally. The difficulty of deformation caused by hot-dip galvanizing requires consideration in the construction of cable trays and galvanizing technology. Other types of coated cable trays have poor UV resistance and are prone to rusting, resulting in large areas of coating blistering and peeling. They are generally not suitable for outdoor use.

二、电镀锌工艺

2、 Electrogalvanizing process

对于没有特殊要求的电缆桥架来说，电镀锌与热浸锌比较起来技术简单，本钱较低。电镀锌经钝化处理后能够明显地进步其防腐功用。电镀锌层一般在6μm左右，因此不适用于对耐腐蚀寿数要求较高的场合。

For cable trays without special requirements, compared to hot-dip galvanizing, electrogalvanizing has a simpler technology and lower cost. After passivation treatment, electrogalvanizing can significantly improve its anti-corrosion function. The galvanized layer is generally at 6 μ Around m, therefore it is not suitable for occasions with high requirements for corrosion resistance lifespan.

电镀锌我国有颁布规范：如GB/T13912-2002、JT/T281-95、GB2694-81等。挑选电镀层时，涂层厚度，涂层吸附力强，通过耐腐蚀试验，不同的诉求对于目标的挑选也是不同的。我国现在出产镀锌桥架的厂家，在参考国标时也不尽相同。选用电镀锌镍合金或镀锌后进行高钝化处理，可以明显进步桥架耐蚀性。

Our country has issued standards for electrogalvanizing, such as GB/T13912-2002, JT/T281-95, GB2694-81, etc. When selecting electroplated coatings, the thickness of the coating and the strong adsorption capacity of the coating are different. Through corrosion resistance tests, different demands for target selection are also different. The manufacturers currently producing galvanized cable trays in China are also different when referring to national standards. Choosing electroplated nickel alloy or high passivation treatment after galvanizing can significantly improve the corrosion resistance of the bridge.

三、粉末喷涂工艺。

3、 Powder spraying process.

PVC资料一般是粉末涂料，聚酯粉末或防腐粉末，涂层厚度约60μm 。静电喷涂具有外形漂亮，抗化学腐蚀的功用。但与金属镀层比较，粘附性低，耐脏性和耐磨损较差。遭受简单外部撞击，可致使其局部涂层掉落，使得内部钢材腐蚀，构成大面积涂层起泡脱皮。运用UV涂料的桥架，一般不适合在户外运用。

PVC materials are generally powder coatings, polyester powders, or anti-corrosion powders, with a coating thickness of approximately 60 μ M. Electrostatic spraying has the function of beautiful appearance and resistance to chemical corrosion. However, compared to metal coatings, their adhesion is low, and their resistance to dirt and wear is poor. Suffering from a simple external impact can cause local coatings to fall off, causing corrosion of internal steel and forming large areas of coating blistering and peeling. Cable trays using UV coating are generally not suitable for outdoor use.

四、涂防锈漆。

4、 Apply anti rust paint.

较大尺度的构件，因为镀锌设备条件所限，一般只能选用涂防锈漆的方法来处理。这当然具有本钱低，操作便利等优势，但防腐蚀性能较差。其工程寿数短暂，为了确保工程质量，一般不宜运用。

Larger scale components, due to the limitations of galvanizing equipment conditions, can generally only be treated by applying anti rust paint. This certainly has advantages such as low cost and convenient operation, but its anti-corrosion performance is poor. Its engineering lifespan is short, and in order to ensure the quality of the project, it is generally not suitable for use.

不管在沿海地区湿度高或是空气二氧化硫指数高的区域，现已广泛运用铝合金桥架。电缆桥架质料为铝合金的，大气露出试验效果表明，该电缆桥架在耐腐蚀方面具有明显优势，特别是选用阳氧化铝腐蚀，效果非常好。

Regardless of the high humidity or high sulfur dioxide index in coastal areas, aluminum alloy cable trays are now widely used in the country. The material of the cable tray is aluminum alloy, and the atmospheric exposure test results show that the cable tray has obvious advantages in corrosion resistance, especially when using anodized alumina for corrosion, the effect is very good.