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Now the hot dipped galvanized steel sheet is mainly hot dipped cold roll galvanized.
Hot dipped galvanized steel sheet is developed from the older hot-dip galvanized method. Since 1836 France applied hot galvanized to industry, it has been one hundred and forty years old. However, the hot dip galvanized industry has developed rapidly over the past thirty years with the rapid development of cold rolled strip.
The production process of hot dipped galvanized steel sheet mainly includes: preparation of original board, pretreatment before plating, hot dipped coating, plating after treatment, finished product inspection, etc. According to the habit, it is often based on
the pre plating process.
Hot dipped galvanized steel sheet has many quality characteristics.
1. Smooth appearance, no zinc tumor, burr, silver white.
2. The thickness is controllable and can be selected within 5-107 m.
3. No hydrogen embrittlement and no temperature hazards. It can ensure that the mechanical properties of materials remain unchanged.
4. It can replace the part of hot dipped galvanizing process.
5. Good corrosion resistance, neutral salt spray test for 240 hours.
Zinc is soluble in acid and soluble in alkali, so it is called amphoteric metal. Zinc does not change almost in the dry air. In moist air, zinc carbonate is formed on the surface
of zinc. In the atmosphere containing sulfur dioxide, hydrogen sulfide and marine atmosphere, the corrosion resistance of zinc is poor, especially in the atmosphere of high temperature and high humidity containing organic
acid, and the zinc coating is easily corroded.
Zinc coating is passivated, dyed or coated with light retaining agent, which can significantly
improve its protective and decorative properties. In recent years, with the development of galvanization technology, the usage of high performance zinc plating brighteners has been put into protective decorative applications from simple protective purposes.
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Hot Dipped Galvanized Steel Sheet in Angola
Hot dipped galvanized steel sheet is mainly used in building, light industry, automobile, agriculture, animal husbandry, fishery and business.
1. Buildings and constructions: roofing, ceilings, gutters, venting lines, indoor decorations,
window frames, etc.
2. Electrical appliances: computer shells, washing machines, refrigerators, dehumidifiers, video recorders, water heaters, etc.
3. Agricultural equipments: troughs, feeding tools, agricultural driers,
irrigation channels, etc.
4. Vehicle parts: back-seat plates of buses and trucks, conveying systems, oil tanks, etc.
In Africa, people use hot dipped galvanized steel sheet to build the house, especially in countries of Angola.
The full name of Angola is Republic de Angola and located in West Africa. The capital city is Rwanda.
Angola's economy is dominated by agriculture and minerals, and Angola also has oil refining industry, mainly distributed in the coastal area of Cabinda. Food processing, papermaking,
cement and textile industry are also relatively mature. Angola's economic potential is very high. It has great potential to become the wealthiest country in Africa. As a former territory of Portugal, it has the name "Brazil
The main shipping port in Angola is Rwanda port. Every year large quantity of hot dipped galvanized steel sheet has been unloaded in Rwanda port from China. The cooperated importing company there is GAJOV COMMERCIAL LIMITED. The required size in Angola is galvanized roofing sheet 0.13 x 800 x 3000 mm , 0.17 x 800 x 3000 mm , 0.3 x 800 x 3000 mm as below photos.
Most of the northern regions belong to the tropical steppe climate, with an annual average temperature of 22 degrees Celsius,
a subtropical climate in the South and a temperate climate in the high elevation area. There are dry season and rain season. Dry season is from May to September and the average temperature of 24 degrees Celsius, relatively cool, wet and no rain. Rain season is from September to May of the following. The climate is hot and the temperature and humidity are high. So professional customers often stop booking hot dipped galvanized steel sheet and start travel holiday then.
Hawk General Manager
Add:Industrial Park, Guanxian County, Shandong province, China
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