High speed ventilate valve1 commonly used anti-corrosion coating technology currently anti-corrosion coating equipments in offshore platforms are mainly used in atmospheric zone, its supporting system are as follows: 2 layers of epoxy zinc rich epoxy primer + 2 + epoxy intermediate paint layer 3 layer 2 layer; zinc rich epoxy primer + vinyl intermediate paint layer + 3 vinyl acrylic coating 2 layer 3 layer; inorganic zinc rich primer + epoxy intermediate paint + 2 layer 3 layer polyurethane topcoat. Which requires a high proportion of zinc rich primer containing zinc powder, and strong adhesion with the substrate; intermediate paint requires strong anti erosion capability; topcoat is provide a protective layer for primer, intermediate paint, reduce and limit water vapor, oxygen and chemical activity of ion penetration.

2 adding zinc corrosion protection technology of zinc compared with traditional organic coating protection technology, has a stronger effect of cathodic protection and coating effects, its corrosion resistance is higher than that of the conventional primer 5-6 times, the corrosion protection of life can reach 25-30 years. The utility model relates to a zinc coating for corrosion protection of steel structures, which is made up of 3 parts of an electrolytic zinc powder (purity higher than 99.995%), organic resin and volatile solvent. Due to high zinc content, zinc plus dry film containing pure zinc more than 96%, enough to provide good cathodic protection for steel structure material, when the zinc coating increases when oxidized in zinc coating surface has a layer of zinc salt slowly to provide barrier protection, while adding zinc in the coating can provide a bonding agent an additional layer of barrier protection, thus reducing zinc oxide. Zinc coating has excellent mechanical and chemical bonding with the surface of the steel structure, and even if it is damaged by abrasion, the zinc coating will not flake off. The engineering of offshore platform at home and abroad proves that the corrosion protection performance of zinc and protective coating technology is excellent. In 1988, the Seto bridge in Japan with zinc paint as primer, has not found any corrosion. In 2000, zinc and protection technology was applied to the local maintenance of offshore drilling platform in Shenzhen Shekou and the offshore drilling platform of Pinghu oilfield in the East China sea.

3 long-term rigid polyurethane polyurethane anticorrosion coatings to protect the 100% solid content of anti corrosion coatings (RPU) containing no solvent, conducive to environmental protection, in addition to RPU film containing carbamate bond, containing urea bond, the other is substantially inert carbon chain structure. Based on the above characteristics, RPU has many excellent properties, such as excellent mechanical properties, hardness, flexibility, light, especially the wear resistance, adhesion is particularly good; hydrolytic stability and resistance to Biofouling Resistance; good heat resistance, can be made of high temperature coating, low temperature coating can be made using 70 DEG C otherwise; corrosion resistance, long life (50 years, can adapt to Engineering) good construction performance. RPU coating has been successively applied in Shanghai international shipping center Yangshan deep-water port, Yingkou port, Qingdao liquid chemical terminal Huangdao liquid chemical wharf construction, currently operating normally, the effect is good; abroad, already in Washington GrandCoulee dam, San Mateo bridge, San Francisco, Saudi Arabia Oman thermal power plant cooling water system, South Korea the Yukong refinery sewage treatment system of Tokyo electric power, Fukushima nuclear power plant, Osaka power plant and power plant using Chiba for 20 years, is currently operating normally. In view of the wide application of RPU coating in hydraulic engineering and its excellent anti-corrosion effect, it can be considered to be used in the equipment and facilities of offshore platform.