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The answers given by everyone are so convincing. How do I allocate scores? Intersection Intersection
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It is best to have an article. Thank you
The answers given by everyone are so convincing. How do I allocate scores? Intersection Intersection
HOT DIP was invented in the middle of the 18th century. It developed from the hot tin -plated process and has entered the fourth century. So far, hot -dip galvanizing is still the most common and effective process measures in the anti -corrosion method of steel. In the three centuries of hot -dip galvanized development, the representatives of each century were: Dr. P.T.Molouin, French chemist, French municipal engineer Sorel, and Polish outstanding inventor and engineer Sen Mirir ( Tadtusz Sendzimir). In 1742, Dr. Malo Ying conducted a pioneering test of the hot galvanized steel and was read out at the Royal College of France. In 1837, Soril in France applied for a hot galvanized patent, proposed the concept of protecting steel to protect steel with the original battery, and proposed a technology of galvanizing rust on the surface of the iron. In the same year, H.W.grawford applied for galvanized patents with ammonium chloride as a solvent. This method has been improving through many improvements. In 1931, the most outstanding engineer of the modern metallurgy industry Polish Mori Micmy, the first hydrogen restoration method in Poland, built the world's first hydrogen restoration method. The steel plant has built an industrial hot -dip galvanized production line named after Mori Mirir, and created a new era with steel continuous, high -speed, and high -quality hot -dip galvanized.
This scholars referred to the patent of Sorir in 1837 and the birth of the Sen Mira in 1937 as the two most important turning points and milestones in the history of hot -dip galvanized. The French hot -dip galvanized process has so far used this method in batches of hot galvanizing; the latter invented the gas reduction method 100 years after the solvent method was invented, thereby laid the foundation of modern continuous hot -dip galvanized. The 20th century solvents thermal galvanizing process has not changed significantly, but the gas reduction process is constantly improving. At present, the Mori Michel Law and the US Steel Consulture are mainly used. Quality Galvanized steel plate.
The hot -plated materials in the past half century have made great development. In the 1950s and 1960s, the United States, Japan, Britain, Germany, France, Canada and other countries successively produced aluminum -plated steel plates. In the early 1970s, the US Berlie Heng Iron Corporation invented the product name: Galvalume's aluminum -zinc -silicon -plated material, and its alloy component was 55 % Al¬ -43.4 % Zn -1.6 % Si, and the corrosion resistance was 2 with a pure zinc plating layer 2 ~ 6 times, widely used in coating with steel production. In the 1980s, the International Lead -Zinc Research Organization (ILZRO) funded the Belgian Line Japan Metallurgical Research Center (CRM) to develop the zinc and aluminum rare earth plating material named Galfan. Two to 3 times the pure zinc plating, widely used in the production of steel and wire.
In the 1960s, Canada took the lead in conducting nickel in zinc nickel's research on thermal plating in suppressing silicon -containing steel and obtained the support of Ilzro. In the 1980s, Europe, North America, Australia and other places quickly promoted hot -dip galvanized -nickel alloy technology, and its craftsmanship was named. At present, the Zn-Ni-SN-BI is developed on this basis, which is suitable for steel with a SI content of less than 0.5 %, which can significantly inhibit the San Delling effect when the silicon steel-containing heat plating.
In the 1990s, Japan New Steel Company developed the zinc, aluminum -magnesium coating material named ZAM, and its chemical components were ZN¬-6 % Al -3 % Mg. (ZN -0.2 % Al) 18 times that, known as the fourth -generation high -corrosion -resistant coating material after the third -generation high -corrosion -resistant coating Galvalume and Galfan. In addition, Zn -4.5 % Al¬ -0.1 % mg; Zn -0.5 % mg; Zn -15 % Al -0.5 % SN; Zn -AL -PB; Zn -0.1 % BI alloy has also been applied to a certain amount of alloy plating, alloy plating The development of development in the second half of the 20th century.
Compared with other metal anti -corrosion methods, hot -dip galvanized technology, electrochemical protection, denseness, layer durability, plating exemption, coating with matrix, plating economy, and heat plating process in the coating The adaptability of the shape, size, and the efficiency of the steel parts has other technologies that are unique and unique. According to the 10 -year -old exposure test of the Japanese galvanized association for 10 years, the durable periods of the hot -dip galvanized layer with a thickness of 86 microns in heavy industries, oceans, suburbs and urban areas are 13, 50, 104, and 30 years, respectively. Generally speaking, the zinc volume of zinc is 600g/m2, and its maintenance life is 20-50 years. For the color plates of non -galvanized substrates for building, their service life is 3 to 5 years, and the substrate plate board is 3 to 5 years, and the substrate plate board is 3 to 5 years, and the substrate is a substrate. Galvanized color boards can use a life of 20-30 years.
2 Domestic hot -dip galvanized current situation
The hot -dip galvanized steel is widely used in the national economic basic industry. Since the "8th Five -Year Plan", my country has vigorously developed power, transportation, communications, energy and urban infrastructure construction. In 1999, the central government proposed the implementation of the western development strategy. With the "Western Delivery East", "National Networking", "West Qi East", "Three Gorges Projects", "South Water and North Diversion", "Two Network Transformation", "Five vertical and Seventh, Seventh, Seventh, and Seventh The development of projects such as horizontal "" railway speed ", with the launch of the building steel structure market, with the recovery of the home appliance and automotive industry, my country's galvanized industry faces unprecedented opportunities and huge markets. Galvanizing is the post -order process of steel production. The development of galvanized industries depends on the production of steel and zinc. The development of the galvanized industry is basically synchronized with the development of the steel and zinc industry. On the one hand, since 1996, my country's steel output has exceeded 100 million tons in a row for 7 consecutive years, ranking first in the world (see Figure 2); on the other hand, since 1994, my country's zinc production exceeds one million tons, which has become the world's number one in the world, and has become the world's number one. In the zinc consumption structure of zinc production, galvanizing zinc consumption has always occupied the first place, and the consumption of zinc consumption of galvanized countries abroad accounts for 40%to 70%of the total consumption of zinc consumption. According to the statistics of relevant departments, the zinc consumption structure in my country is shown in Figure 3. Among them, zinc -galvanized zinc is about 34%. Generally speaking, the amount of zinc consumer consumer accounts for more than 95%of various types of galvanized (heat -plating, electroplating, mechanical plating, hot spray plating, thermal seepage plating, etc.). In recent years, my country's hot -dip galvanized zinc consumption is about 50 to 550,000 tons.
The hot -dip galvanized process is widely used in steel plates, steel belts, steel wires, steel pipes, structural parts, parts and other products. my country's galvanized enterprises can be roughly divided into two categories: one is a galvanized professional processing plant. Its purchased steel or materials is processed and only engaged in hot -dip galvanized processes; the other is non -professional factories. A process in the entire production process. Most of the steel and steel galvanized enterprises are non -professional factories. Most of the galvanized steel and components are professional factories, and the rest are both.
Hot -dip galvanizing is a process technology that immerse metals such as steel, stainless steel, and cast iron into a melting liquid metal or alloy to obtain plating.
The standard electrode potential of zinc is negated with iron, so galvanizing layers in water and humid air have the effect of sacrificing anode protection steel, which can greatly extend the service life of steel. According to the data released by the "China Hot Galvanizing Industry Development Prospects and Investment Forecast Analysis Report" released by the Foresight Industry Research Institute, the commonly used galvanized layers in the industry include hot immersion galvanized, electroplating, mechanical galvanized and hot spray (galvanized) zinc Among them, hot galvanized accounts for approximately 95%of the total galvanized amount, the amount of zinc used in thermal galvanization accounts for 40%of the zinc output worldwide, and about 30%of the zinc production in China.
The hot -dip galvanizing is the most widely used steel surface treatment method in the world today. Hot -galvanized products plays an inestimable and irreplaceable role in the corrosion of steel, energy saving materials, and energy -saving materials. At the same time, coating steel is also a high value -added short -term product supporting and priority development.
The analysis of the hot -dip galvanized industry research team of the Prospective Industry Research Institute believes that with the implementation of the western development strategy, West East Transmission, West Qi East Transmission, South Water and North Diversion, Three Gorges Projects, Nong Nets, and Urban Power Grid In -depth development of projects such as the second network transformation, my country's thermal galvanized industry has entered a new stage of high -speed development.
In general, the hot -dip galvanized industry has good prospects and good growth prospects.
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Forecast: Galvanized zinc quantity increases zinc prices optimistic
November 30, 2006 9: 2 Source: Specole Financial Netizen Comment 0 to enter the forum
The performance of conductivity, easy to process, especially the effect of sacrificing anode protection, can greatly extend the service life of steel workpieces. Therefore, galvanizing galvanizing as a long -term anti -corrosion measures around the world. In the industrialized country, zincing in the field of galvanizing occupies more than 50 % of the initial consumption of all zinc. Galvanized products have been widely used in various fields such as industry, energy, transportation, chemical industry, light industry, home appliances, construction, communications, and national defense.
If the largest consumer field of galvanizing industry, with the development of the automotive industry and construction industry, the demand for galvanized steel plates and die -casting components has increased, and zinc alloys will have a broad future. The development of the automotive industry and construction industry is the main driving force for the development of galvanized plates. In addition, in various types of galvanized industries such as hot -plating, electroplating, hot spray plating, and mechanical plating in my country, the amount of heat galvanized accounts for more than 95%of the total amount of galvanized consumption.
At present, the proportion of zinc in the field of galvanizing in my country is still lower than the level of western developed countries. However, in recent years, with the rapid development of industries such as household appliances, buildings, power and transportation industries, the proportion of galvanized zinc in my country's zinc consumption structure has shown a significant increase in the proportion of zinc consumption structures in China, and it has become the main driving force for zinc consumption to consumption. one. According to statistics from the Nonferrous Metal Industry Association, the proportion of zinc in the field of galvanizing my country has increased from 31 % in 2002 to 36 % in 2005.
Since 2001, my country's construction industry has been showing a high -speed development state. At the same time, the automotive industry has maintained rapid development since 2002. We expect that with the steady growth of China's economy and the improvement of people's living standards, automobile production and sales will continue to grow rapidly for a long time. Galvanized steel market has a broad prospect.
The on the other hand, the consumption demand for galvanized steel in the power and transportation industry has increased significantly. The implementation of the implementation of the Three Gorges Power Transfer Project, the National Power Transmission Network, and the West East Transmission Project greatly increased the demand for galvanized iron tower. Moreover, according to the "National Highway Network Plan" plan, by 2020, my country will form a national highway network of 85,000 kilometers. At present, my country's highway is only more than 40,000 kilometers. From 2006 to 2020, a construction climax will be ushered in. Investment is more than 100 billion yuan. In addition, the construction of subways and urban light rail infrastructure will also use a large amount of galvanized pipe and galvanized plate.
. At present, the galvanized rate of Chinese steel is only about 20 %, which is still a large gap compared to the 55-60 % ratio of Japan, the United States and other countries. Therefore, galvanized plates generally belong to the key steel varieties in my country. In recent years, the investment in domestic galvanized industries has developed rapidly. Large steel mills, such as Pan Gang, Baosteel, Anshan Iron and Steel, Wugang, Malaysia, Ben Steel, Hansteel, Tang Gang, etc., all of them have built hot -dip galvanized units. In addition, the production technology of the grown -plated units is introduced from abroad, with high equipment level, high production capacity (generally 35 to 500,000 tons/year), high product positioning, and the sales market is mainly directed at automobiles, home appliances and high -quality building materials. In addition, the investment of private enterprises in galvanized fields is mainly to build separate galvanized units, with production capacity below 200,000 tons/year. The products are mainly facing the general building materials market.
A statistical data from the Iron and Steel Industry Association shows that the output of galvanized boards in China's steel industry in 2000 was only 1.82 million tons, and the output increased to 7.5 million tons in 2005. The growth rate in the past five years has complied with growth rates in the past five years. As high as 32.7%. It is expected that China's galvanized plate output will exceed 11 million tons in 2006, and the consumption of 40 kg of zinc per ton of zinc plate will be calculated, which will increase zinc consumption by 140,000 tons.
The metal zinc is widely used in the industrial field that zinc has good corrosion corrosion, heat conduction, conductivity and other properties. It is easy to process. It is an important non -ferrous metal raw material. aluminum. The consumption structure of zinc is quite stable. About 50%of its consumption volume is used as anti -corrosion coating, 19%is used to produce brass, 16%are used for producing zinc -based alloy, and the rest are used for rolling zinc plates and zinc chemicals. And pigment production. At the same time, zinc and many metals can form various alloys with excellent performance. The main alloys are: zinc, copper, tin, lead, etc. are made of brass for mechanical manufacturing; zinc and aluminum, magnesium, copper, etc. are made of zinc, magnesium, copper, etc. Die -casting alloys are used to make various precision castings. Galvanizing the surface of steel and various cast iron can prevent corrosion. Zinc -spraying materials and various corrosive materials are widely used. Zinc processing materials are the main materials for manufacturing dry batteries. Zinc compounds, such as zinc oxide and Lide powder are medicines, are medicines, and are medicines. The indispensable raw materials for rubber, pigment and paint industries.
If according to the statistics of the US Geological Survey, as of 2004, the world has found that zinc reserves (metal quantity, the same below) are 220 million tons, with a basis of 460 million tons. The static guarantee period is 23 and 50 years. China is a country with rich zinc reserves in the world. It is equivalent to Australia and the United States. It ranks first in the first group, but its per capita ownership is lower than the world average. At present, China is the world's largest refined zinc production and consumer country. In 2005, refined zinc production and consumption accounted for 27.4 % and 30.1 % of the world's, respectively.