ã€China Aluminum Industry Network】 1. Application of Anti-Atmospheric Corrosion Coatings Cathodic protection is applied to the surface of outdoor steel structures by spraying zinc, aluminum and its alloys. Instead of the traditional brush paints, large-scale anti-corrosion projects have developed rapidly in recent years in China. Steel structures, steel containers, girder bridges, TV towers, building antennas, transmission substations, steel poles and other outdoor steel structures. These steel components are subject to long-term exposure to the atmosphere, subject to climate change and the sun and rain, the surface quickly Oxidation, a layer of ferric oxide, seriously affect the strength and service life of steel structures, in order to prevent the oxidation of the surface of the steel structure, in the past generally used paint or galvanized protection, the anti-corrosion period is generally 3 to 5 years, so you need Frequent repairs and maintenance consume a lot of manpower and material resources. Now it is protected by flame or arc spraying zinc spray and aluminum spray process. The anti-corrosion service life is up to 30 years without maintenance. If it is sealed with zinc or aluminum coating, it will have a longer period of antisepsis. The surface of the steel structure can only play the role of anode protection after flame or arc spraying and aluminum spraying, so as to achieve the purpose of long-term corrosion protection of steel structures. Therefore, many major national and municipal projects have been designated to adopt this technology. Such as: Longer Three Gorges Gate of the Yangtze River, Shanghai Oriental Pearl TV Tower, Yangpu Bridge Main Guard Bar, Guangzhou Inner Ring Elevated Steel Beam, Steel Structure Aerial of Shanghai Securities Building, Gonggou Gap Gas Pipeline of Pudong Airport Road, Shanghai South Bridge 500,000 kilowatts Substation And so on, to ensure a hundred years of major projects.
2. Water-resistant corrosion coating Large steel sluice gates are the main steel structures controlling the water level in hydroelectric power stations and reservoirs. Some of them are long-immersed in water, and the surface is subject to microbial attack (such as the adsorption of nails and their excrement is acidic). The other part is exposed to the atmosphere for a long time, especially on the waterline. It is affected by surfing and floating objects on the water surface. At the same time, it is affected by high tides and low tides. The surface of this part of the steel structure often alternates between wet and dry, and is particularly prone to rust. The use of flame or arc spray zinc, aluminum spray process, greatly improving the corrosion resistance of steel gate, than the original paint process used to improve the anti-corrosion period of 5 to 6 times.
Spraying zinc, aluminum, and its alloys on the surface of steel structures in the outdoors is cathodically protected. Instead of traditional brush paints, large-scale anti-corrosion projects have developed rapidly in recent years in China. Steel structures, steel containers, girder bridges, TV towers, building antennas, transmission substations, steel poles and other outdoor steel structures. These steel components are subject to long-term exposure to the atmosphere, subject to climate change and the sun and rain, the surface quickly Oxidation, a layer of ferric oxide, seriously affect the strength and service life of steel structures, in order to prevent the oxidation of the surface of the steel structure, in the past generally used paint or galvanized protection, the anti-corrosion period is generally 3 to 5 years, so you need Frequent repairs and maintenance consume a lot of manpower and material resources. Now it is protected by flame or arc spraying zinc spray and aluminum spray process. The anti-corrosion service life is up to 30 years without maintenance. If it is sealed with zinc or aluminum coating, it will have a longer period of antisepsis. The surface of the steel structure can only play the role of anode protection after flame or arc spraying and aluminum spraying, so as to achieve the purpose of long-term corrosion protection of steel structures. Therefore, many major national and municipal projects have been designated to adopt this technology. Such as: Longer Three Gorges Gate of the Yangtze River, Shanghai Oriental Pearl TV Tower, Yangpu Bridge Main Guard Bar, Guangzhou Inner Ring Elevated Steel Beam, Steel Structure Aerial of Shanghai Securities Building, Gonggou Gap Gas Pipeline of Pudong Airport Road, Shanghai South Bridge 500,000 kilowatts Substation And so on, to ensure a hundred years of major projects.
3. Water-resistant corrosion coating Large steel sluice gates are the main steel structures controlling the water level in hydroelectric power stations and reservoirs. Some of them are long-immersed in water and the surface is subject to microbial attack (such as the adsorption of nails and their excrement is acidic). The other part is exposed to the atmosphere for a long time, especially on the waterline. It is affected by surfing and floating objects on the water surface. At the same time, it is affected by high tides and low tides. The surface of this part of the steel structure often alternates between wet and dry, and is particularly prone to rust. The use of flame or arc spray zinc, aluminum spray process, greatly improving the corrosion resistance of steel gate, than the original paint process used to improve the anti-corrosion period of 5 to 6 times.