Steel structures are usually sprayed with zinc or Alumi […]
Steel structures are usually sprayed with zinc or Aluminium Coated, aggravated corrosion coatings are used to form long-lasting anti-corrosion structures, or matching heavy-duty coatings are used for protection. Metal zinc and aluminum have great resistance to atmospheric corrosion. Spray zinc or aluminum on the steel components. Zinc and aluminum have a negative potential and the steel forms a sacrificial anode protection, so that the steel is basically protected. At present, spray aluminum coating is used to prevent corrosion in industrial atmosphere and marine atmosphere, and its characteristics are as follows:
(1) The aluminum spray coating has strong bonding force with the steel substrate, long coating life, and good long-term economic benefits;
(2) The process is flexible, suitable for long-term protection of important large-scale and difficult-to-maintain steel structures, and can be constructed on site;
(3) Zinc-sprayed or aluminum-sprayed coating and anti-corrosion coating sealing can greatly extend the service life of the coating. From the perspective of theory and practical application effects, zinc-sprayed or aluminum-sprayed coating is the best bottom layer for anti-corrosion coatings. The protective life of the composite coating of the metal spraying layer and the anticorrosive coating is longer than the sum of the lifespan of the metal spraying layer and the anticorrosive coating protective layer, which is several times longer than the life of a single coating protective layer.
