Typical applications of thermal lying zinc and aluminum corrosion-resistant coatings

Application of anti-atmospheric corrosion coating.
Steel structure plant, steel box bridge, tv tower, building antenna, transmission substation, steel lamp rod and other outdoor steel structure these steel components due to long-term exposure to the atmosphere by climate change and sun and rain surface rapid oxidation to produce a layer of iron trioxide seriously affect the strength and service life of steel structureIts anti-corrosion period is generally 3-5 years so that regular maintenance, maintenance common method is to torture paint consumes a lot of manpower and material resourcesNow the use of steel structure surface zinc spray, aluminum spray process to protect the corrosion protection period of more than 30 years without maintenanceThe steel structure surface can only play the role of anode protection after spraying zinc and aluminum, so to achieve the purposeof long-lasting corrosion prevention of steel structureTherefore, many major national projects and municipal projects have been designated to use this processSecond, anti-water corrosion coating.
Steel floodgates are hydroelectric power stations, reservoirs in the main steel structure to control water, some of its long-term immersion surface is subject to microbial erosion (such as the scorpion adsorption of its excreta acidic)Another part of the long-term exposure to the atmosphere, especially the water line part by the impact of surf and floating on the surface, but also by the high tide, low tide impact so that this part of the steel structure surface often wet and dry alternate is particularly easy to rustThird, zinc-sprayed, aluminum-
sprayed process and similar process performance comparison (hot galvanizing process)1, hot galvanizing process pre-treatment using acid washing, phosphating process workpiece surface will have acid, the residue of the alkali left corrosion hidden dangers so that the hot galvanizing layer is easy to produce shedding2, the hot galvanizing process has a certain temperature of about 440 degrees C or so after thermal plating of the old workpiece will produce deformation, and the temperature of zinc spray, aluminum spray process when sprayed is very low worksurface temperature 80 degrees C so the workpiece is not deformed3, the use of hot galvanizing process workpieceby by the length of the plated groove x width x height restrictions, while the use of zinc-sprayed, aluminum-sprayed process is no limitto the workpiece4, the use of hot galvanizing process there are still on-site repair problems On-site installation welds, loading and unloading, transportation in the process of damage repair can only use paint to produce a process breakthrough If the use of zinc spray, aluminum spray process can be used on-site zinc spray, aluminum spray method to repair to avoid the production of process breakthrough 5, due to the pre-treatment of hot galvanizing process using acid washing, phosphating the surface of the old workpiece without rough brownness, coating binding force is poor, and zinc spray, aluminum spray process of pre-treatment using sandblasting Sa 2.5 grade old workpiece surface has a higher combining force of rough brownness coating 6, hot galvanizing process on water pollution is very serious environmental problems are very prominent, so hot zinc spray, aluminum spray technology is more and more extensive