First, the application of anti-corrosion coating.
Steel structure plants, steel box girder bridges, TV towers, building antennas, transmission substations, steel poles and other outdoor steel structures, which are subject to climate change, sun and rain, and the surface is quickly oxidized due to prolonged exposure to the atmosphere. The formation of a layer of ferric oxide seriously affects the strength and service life of the steel structure. In order to prevent the oxidation of the surface of the steel structure, paint protection has generally been used in the past, and its anti-corruption period is generally 3-5 years, so it requires regular maintenance, Maintenance, the common method is to copy shovel paint, cost a lot of manpower and material resources. Now use steel surface spray zinc, aluminum spray process to protect, anti-corrosion life of up to 30 years without maintenance. Such as zinc-aluminum coating plus paint closure , the antiseptic is longer.
The surface of the steel structure can only play the role of anode protection after zinc spray and aluminum spray, so as to achieve the purpose of long-term corrosion of steel structures. Therefore, many major projects and municipal projects in the country have been designated to adopt the technology. For example: the Yangtze River Three Gorges longer gate , Shanghai Oriental Pearl TV Tower, Yangpu Bridge main guardrail, Guangzhou city's inner ring elevated steel beam, steel antenna of Shanghai Securities Building, Pudong Airport Road Gonggou gas explosion pipeline, Shanghai South Bridge 500,000 kilowatts substation, etc., to ensure major projects The centennial plan.
Second, anti-water corrosion coating.
The steel sluice gate is the main steel structure controlling the water volume in the hydroelectric power station and reservoir. It is partially submerged in water for a long time. The surface is subject to microbial attack (such as adsorption of nail rakes, and its excrement is acidic). The other part is exposed to the atmosphere for a long period of time. In particular, the waterline part is affected by surfing and floating objects on the water surface, and at the same time, it is affected by rising tides and low tides. This makes the surface of the steel structure often wet and dry alternately, and is particularly prone to rust. Now zinc is sprayed on the wire, and aluminum is sprayed. The process has greatly improved the corrosion resistance of the steel gate, which is 5 to 6 times longer than the original paint process.
Carbide inserts are mainly made of solid carbide as the matrix, which is processed through multiple production processes.
The carbide inserts are divided into CNC inserts, turning inserts, milling inserts.
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