At present, zinc-chromium coating technology has been successfully applied in automobile industry, railway, subway, maglev train, elevated light rail, bridge, civil steel structure, household appliances, shipbuilding, electric power, communication, military industry, etc., and the development trend is still in Fangxing. The rapid development stage. Like everything in the world, zinc-chromium coating technology is not a panacea, and it has a corresponding application level, so it must be targeted and selectively used. Dacromet surface treatment application examples: In 2002, the world's first operating maglev train was built in Shanghai, and the magnetic suspension track used a large number of fasteners treated with zinc-chromium coating technology. In 1993, the Nanjing Hongguang Airborne Equipment Factory of the Ministry of Aviation introduced the first domestic zinc-chromium coating production line from Japan in order to solve the localization of automobile safety belts. The original intention of the introduction was to take the road of introduction, digestion, absorption and innovation, and develop domestically produced equipment and countries. The zinc-chromium coating is formed to form a complete set of output technology, equipment and zinc-chromium coating. The predecessor of Dacromet technology development: zinc chromium coating technology Zinc-chromium coating technology, also known as Dacromet technology, is a surface coating technology with simple and convenient process and good protection effect. This technology is derived from the Western automotive industry. The automotive technical standards stipulate that fasteners above 8.8 are not allowed to be electrolytically treated, and structural members with tensile strength Rmax ≥ 1000 N/cm2 must also be treated with zinc-chromium coating. Black Annealed Wire,Dark Annealed Wire,Annealed Iron Wire,Black Annealed Iron Wire ANPING HONGYU WIREMESH CO.,LTD , https://www.hongyu-wiremesh.com
In 1997, Shanghai Dacromet Coating Industry Co., Ltd. introduced a second zinc-chromium coating production line from Japan. Since then, Shanghai Rongsheng Coating Company, Shanghai Extra Strong Fastener Company, and Guangzhou Honda Company have successively introduced zinc-chromium coating from Japan. Layer production line. In the introduction of the initial applications to focus more on the automotive industry, but it was only an annual domestic car a few million, so the zinc chromate coating application market is still publicity and training stage.
In 1999 the state power grids, invest a lot of money to the national high voltage switch industry has injected vitality, companies take advantage of the opportunities for technological innovation, due to the excellent performance of zinc chromate coating technology, surface treatment industry has been favored in Pingdingshan High-voltage switch group metal anti-corrosion engineering Co., Ltd. took the lead in building the line in 1999, Xi'an high-voltage switch factory, Shenyang high-voltage switch factory, Jiangsu Rugao high-voltage switch factory, etc. all invested in the construction of zinc-chromium coating production line, which led to zinc-chromium coating. Tech industry started.
The Beijing Subway, Shanghai Metro, Nanjing Metro, Guangzhou Metro, Shenzhen Metro, and Chongqing Light Rail have all brought unlimited business opportunities to zinc-chromium coating technology, which has promoted the development and application of this technology.
In 2005, China's car production reached 5.6 million, surpassing Japan's domestic production of car production ranked second in the world, currently Changchun FAW, Dongfeng Second Automobile, Shanghai Volkswagen, Guangzhou Honda, Jinan Heavy Duty Truck, Zhengzhou Yutong, Chongqing Kafu, Hefei, Jiang Huai, Nanjing Yuejin, Pax electric locomotives, etc. are zinc chromate coating production line for supporting services.
The rapid development of communication industry after China's reform and opening up has also brought great business opportunities to zinc-chromium coating technology. The transmitting antenna system of mobile communication uses zinc-chromium coating technology.
At the forefront of the military industry, many companies have established zinc-chromium coating production lines.
With the transfer of the world's machinery manufacturing industry to China, a large number of export products are currently treated with zinc-chromium coating, which is most obvious in the Pearl River Delta.
The car industry has developed rapidly in North America and Europe. The weather is cold and snow is heavy, causing roads to freeze, causing road traffic jams and frequent traffic accidents. People using this purpose scattered snow salinization method, the United States consumes about a year for spreading salt salting snow l0 million tons, snow melting salt sprinkled Salt accelerates the corrosion of the car. With the development of industrialization in the world in recent decades, the acid rain phenomenon has become more and more serious. Salt water and acid rain have put forward higher requirements for automobile anti-rust technology. Dl- AMONDSHAMROCK of the United States invented the zinc-chromium coating technology and patented the above problems, so the zinc-chromium technology originated from the automotive industry.
Nippon Oil Corporation (NOFCORPORATION) and the United States established a joint venture in Japan METALCOATINGSINTERNATIONALINC Nasdaq Le Shamrock Corporation zinc chromate coating technology to promote industrialization, and rapid development in Japan, has become the world's zinc chromate coating industry "Lord". At present, the global zinc-chromium coating industry is divided into four regions: Japan NDS is responsible for the Asia-Pacific business; US MCIl is responsible for the North American business; France DACRAL is responsible for the European business; Brazil Metal Coatings (MCB) is responsible for South America business. Four international companies participate in each other and form an alliance.
In the 1970s, the stampings of the inner and outer panels, fenders, inner panel tops, tailgates, rear outer panels and water tank brackets of automobile doors were pre-baked with zinc chrome coating and coated with epoxy after reverse roller coating. Zinc-rich coatings, such sheets have good stamp formability and corrosion resistance. In l997, such steel plates were consumed in tons.
Before the end of the Cold War, the technology belonged to the "Paris Conference" technology that imposed a blockade on the socialist countries. We have no knowledge of the application process in the past 20 years. In 1992, Shanghai Automotive Air Conditioner Factory took a complete set of equipment from the United States and took a processing line for zinc-free aluminum sheets that specializes in aluminum evaporators. In 1993, the Japanese side of Tianjin Laifu Company invested in a zinc-chromium coating production line , which specializes in processing and reselling Japanese civil construction embedded parts; therefore, the above two production lines are not strictly the first zinc-chromium coating production line in China.
Japan is one of the most widely used countries in zinc-chromium coating technology. It has more than 100 production lines and processes 200,000 tons per year. Japan NDS produces and sells zinc-chromium coatings every year. 80,000 tons, widely used in automotive, civil construction, shipbuilding, railways, subways, bridges, household appliances and other industries.
There are more than 70 zinc-chromium coating production lines in Europe. Among them, Italy is the main supplier of fasteners in Europe, so there are about 10 production lines. There are about 30 production lines in the automobile kingdom and about 12 production lines in Brazil.