Spray aluminum zinc steel spray application of anti-arc spraying in domestic long-term anti-corrosion technology in the 1990s, the metal arc spray coating technology, especially in the application of the most common, and its prospects for broader application. Corrosion is the use of arc spraying arc spraying equipment, the two charged wire (such as zinc, aluminum, etc.) for heating, melting, atomization, spray formation of anti-corrosion coating, plus a long-term anti-corrosion coating of organic closed composite coating notable feature of the coating is:
With long-term corrosion resistance than the life of the corrosion life of up to 50 years while the 30-year anti-corrosion coating used in any other period of no corrosion maintenance; 30 years after the maintenance is only required to brush on the closed arc spray coating layer; not re-sprayed to achieve an anti-corrosion coating prolonged effectively.
Arc spray coating and the metal matrix coating with excellent adhesion (up to 10Mp above), the metal coating layer mechanical and micro-mosaic base metal metallurgy combined with the slight bend, even under shock or impact to ensure anti-corrosion coating do not fall off, can not afford leather, combined with a solid, long-term effective anti-corrosion, which is any other surface anti-corrosion coating can not be achieved.
Arc spraying of zinc, aluminum coating principle as cathode corrosion protection in corrosive environments, even if the local anti-corrosion coating damage, still has to sacrifice themselves to protect the steel matrix effect. Coating (anode) and the steel structure building substrate (cathode) of the area ratio ≥ 1; and zinc-rich coating of the anode and cathode are more than “1, the protective effect and binding force is far less than the arc spraying anti-corrosion coating.
Worked in coal mines, railway, water conservancy, port, metallurgy, machinery, radio and television, health care, electricity, fire and other fields are widely used, such as Baoshan Iron and Steel Group Majishan Port steel piles, Shanghai Maglev train track functional parts, the Yangtze River Three Gorges Project, Yangtze River Bridge in Wuhan Junshan steel box girder and bridge construction projects and other key state Qiandao Lake Nanpu Bridge, Long Jiang Huangbo River Bridge, the next securely River Bridge, the Guangzhou airport Sanyuanli overpass, Xulian highway Pizhou Canal Bridge and other steel bridges are used long-term anti-corrosion technology for electric arc spraying of corrosion protection, and get a good anti-corrosion effect. China has fully capable of using long-term anti-corrosion technology to solve arc spraying large national bridge industry steel structure corrosion protection problems.
The heavy-duty steel bridge technology has gradually formed the two trends, first, the rapid development of inorganic zinc-rich paint as the base of heavy-duty system, the second is more mature as the base metal coating layer of heavy-duty system, Because these two systems have excellent corrosion resistance and environmental adaptability of various types of steel bridges by corrosion concerns. In the next few years will save the country a lot of steel bridge corrosion maintenance costs, reduce environmental pollution, to extend the service life of steel bridge, resulting in huge economic and social benefits.