钢结构喷铝喷锌防腐的施工工艺发布时间：2015-9-6 9:06:09 浏览次数:690
General electric arc spraying equipment by rectifying power supply, control device, spray gun, wire tray or wire feeding device, compressed air supply system, etc. Wire tray and compressed air supply system is the same as the wire flame spraying. Arc spraying zinc and aluminum process parameters besides has much to do with spraying material, still depends on the use of equipment and the production efficiency.
Steel structure aluminum zinc spray in the domestic application of arc spraying long-term anti-corrosion technology in the 1990 s, metal spraying technology of arc spraying applied in the most common, and its application prospect is also more widely. Arc spraying anti-corrosion principle is the use of electric arc spraying equipment, the two electrically charged metal wire (such as zinc, aluminium, etc.) for heating, melting, atomization and spray forming anticorrosive coating, and long-term anti-corrosion composite coating of organic coating, closed the significant characteristic of the coating is:
Have a long use life its anti-corrosion life can reach more than 50 years and the anticorrosion coating used in 30 years period without any other anti-corrosion maintenance; After 30 years of maintenance, only on the arc spray coating to brush an enclosed coating; Need repainting, realize a preservative, effective coating over a long period of time.
Arc spraying coating and metal substrate with excellent adhesion (can reach more than 10 mp), metal coating layer with mechanical setting and micro metallurgy combined with matrix metal, under slight bending, impact or collision can also ensure that the anti-corrosion coating fall off, peeling, combined with strong, anti-corrosion is effective for a long time, it is out of reach for any other surface anticorrosion coating.
Arc spraying zinc and aluminum coating anticorrosive principle for cathodic protection, in corrosive environment, even if the anti-corrosion coating and local breakage, still have sacrificed themselves to protect the effect of the steel substrate. Coating (anode) and the area ratio of the steel substrate (cathode) is 1 or more; And zinc rich coating of anode and cathode than < 1, the protection effect and the binding force is far less than the arc spraying anti-corrosion coating.