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HomeNewsThe difference between hot-dip galvanizing and cold galvanizing of solar street light poles

The difference between hot-dip galvanizing and cold galvanizing of solar street light poles

2021-02-23
Solar street lights are products that have only emerged in recent years and are mainly used on new rural roads, such as village roads and township roads. This is because the country has introduced poverty alleviation policies in recent years to help various regions build beautiful new rural areas, so new rural areas are the main market for solar street lights. And Solar Street Light poles can be divided into hot-dip galvanizing and cold-dip galvanizing, so what is the difference between hot-dip galvanizing and cold-dip galvanizing solar street light poles? The following is the sharing of Longine Lighting:

1. Appearance

The electro-galvanized surface is relatively smooth and bright, and the electroplated layer using the color passivation process is also yellow-green as the main color, which is colorful. The electroplating layer using the white passivation process is bluish white or white with green light, and the electroplating layer of the white passivation process is slightly colorful at a certain angle with the sunlight. The corners of complex workpieces are prone to "electric firing" and become grayish, where the zinc layer is thicker. Electric current is easy to form in the negative corners, resulting in undercurrent gray areas, where the zinc layer is thinner. There is no zinc tumor or agglomeration on the whole work piece.

The appearance of hot-dip galvanizing is slightly rougher than that of electro-galvanizing, and it is silver-white. The appearance is prone to process water lines and a few drips, especially at one end of the workpiece. The slightly rough hot-dip galvanized zinc layer is dozens of times thicker than electrogalvanized, and its corrosion resistance is also dozens of times that of electrogalvanized. The price is naturally much higher than that of cold galvanized. Hot-dip galvanizing with rust for more than 10 years is more popular than cold galvanizing with 1-2 years of rust-proof.

2. Process

Cold galvanizing is also called electro-galvanizing. It uses electrolysis equipment to degreasing and pickling the workpiece into a solution of zinc salt, and connect it to the negative electrode of the electrolysis device. Place a zinc plate on the opposite side of the workpiece and connect it to the electrolysis device. The positive pole is connected to the power source and the current is moved from the positive pole to the negative pole to deposit a layer of zinc on the workpiece; hot-dip galvanizing is to immerse the workpiece in the molten zinc solution after degreasing, pickling, dipping and drying. After a certain period of time, just put it forward.

3. Plating structure

Hot-dip galvanizing has a layer of relatively brittle compound between the coating and the substrate, but this does not have much impact on its corrosion resistance, because its coating is a pure zinc coating, the coating is relatively uniform, there are no pores, and it is not easy Corrosion; while the coating of cold galvanizing is composed of some zinc atoms, which belongs to physical adhesion, and there are many pores on the surface, which are easily corroded by environmental influences.
农村太阳能路灯4. Operation method

From the names of the two, we should be able to know this difference. The zinc in cold galvanized steel pipe is obtained at room temperature, while the zinc in hot-dip galvanized steel is obtained at 450℃~480℃.

5. Coating thickness

The thickness of the cold galvanized coating is generally only 3~5μm, which is much easier to process, but the corrosion resistance is not very good; while the hot-dip galvanized coating usually has a thickness of 10μm and above, and the corrosion resistance is much better, probably cold plating Dozens of times the zinc pole.

6. Price difference

Hot-dip galvanizing is a lot more troublesome in production and requires more requirements. Therefore, some companies with relatively outdated equipment and relatively small-scale manufacturers generally adopt cold-galvanized mode, and the price and cost are much lower; and production Manufacturers of hot-dip galvanizing are generally more upright, with larger scale, better control over quality, and higher cost.

The above about the difference between hot-dip galvanizing and cold-dip galvanizing of solar street light poles. Rural solar street light manufacturer Langkin Lighting will share here for everyone. If solar street light poles are to be used in coastal areas, wind resistance and corrosion resistance must be considered. Don't create a garbage project just because you are greedy for cheap.

ZHONGSHAN G-LIGHTS LIGHTING CO., LTD.
Business Type:Manufacturer , Trade Company
Product Range:Holiday Lighting , Flood Lights , Professional Lighting
Products/Service:Outdoor LED Project Lighting , Fiber Optic Lighting , Project Lighting Consultant , Landscape Lighting Solution , Solar Street Light , Customize Chandelier
Certificate:CE , EMC , RoHS , Test Report , TUV , FCC , MSDS
Company Address:NO.3 Dongyi Road, Luosha Industrial Area, Haizhou, Guzhen Town, Zhongshan City, Guangdong Province, China, Zhongshan, Guangdong, China

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