Welding difficulty (1) easily oxidized. In the air, Hubei starter recovery, aluminum oxide combined with easy to produce a dense aluminum oxide film (thickness of about 0.1-0.2μm), high melting point (about 2050 ℃), far more than aluminum and aluminum alloys The melting point (about 600 ℃). Alumina density 3.95-4.10g / cm3, aluminum is approximately 1.4 times the surface of the aluminum oxide film of easy absorption of moisture, welding, it prevents fusion of the base metal, easy to form pores, slag, No fusion defects, performance degradation caused by welding. (2) easy to produce pores. Aluminum and aluminum alloys mainly pores generated during welding is hydrogen, since a large amount of liquid hydrogen can dissolve the aluminum, which solid aluminum hydroxide is almost insoluble, so that when the bath temperature rapid cooling and solidification, too late to escape hydrogen, easy welding cracks aggregate to form pores. Hydrogen is difficult to completely avoid the holes, many sources of hydrogen, electric arc atmosphere of hydrogen, aluminum, wire surface oxide film adsorbed moisture in the air and so on. Practice has proved that, even if the argon gas by GB / T4842 standards, purity of 99.99%, but when the moisture content of 20ppm, there will be a lot of dense pores, when the relative humidity exceeds 80%, if not take heat and other measures, the weld will obviously appear pores. At the same time, using a small welding current slow increase weld cooling time, and use wire arcs puddle agitation, can better help the gas discharge bath. Development and utilization of renewable energy sources is an important measure to build a new socialist countryside rural economic and social development is the weakest area of ??energy infrastructure, the country there are about 1150 million people without electricity, many rural life energy is still mainly rely on traditional use patterns straw, firewood and other biomass inefficient direct combustion to provide rural areas rich in renewable energy resources, speed up the development and utilization of renewable energy sources, one can make use of local resources, local conditions to solve the electricity supply in remote areas and rural residents energy issues, Jiangsu starter recovery, on the other hand biomass resources in rural areas can be converted to commercial energy, renewable energy has become characteristic industries in rural areas, effectively extend agricultural industrial chain, improve agricultural efficiency, increase farmers' income, improve rural Environment, Anhui starter recovery, sustainable economic and social development in rural areas of the development and utilization of renewable energy is to develop new economic growth areas, promote economic restructuring, expanding an important choice of employment. Renewable energy resources are widely distributed, the region have certain conditions for the development and utilization of renewable energy development and utilization of renewable energy is the use of local natural resources and human resources, starter recovery, promoting economic development in the region is important. At the same time, renewable energy is the high-tech and emerging industry, the rapid development of renewable energy has become a new economic growth point, can effectively stimulate the development of equipment manufacturing and other related industries, the adjustment of industrial structure, promote economic growth mode transformation, expanding employment and promoting sustainable economic and social significant Henan starter recovery, recycling starter, Shengxin recycling scrap metal recycling scrap metal from the Linyi City Shengxin Limited. Linyi City Shengxin scrap metal recycling Ltd. (shengxin.tz1288.com) strong, credible, in Linyi, Shandong scrap metal industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shengxin scrap metal recycling into the brilliant and you work for a better future!