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Vinyl Resin Opens New Space For Wind Power Anti-corrosion Applications

Jun 16, 2020

     Vinyl resin is an internationally recognized highly corrosion-resistant resin. It has been widely used in ships, yachts and other industries. With the expansion of application fields, the anticorrosion of wind power blades and oil tanks will become two new emerging applications of vinyl resin.

  According to experts, gradually replacing the widely used epoxy resin with more cost-effective vinyl resin will become the future development trend of wind power blades. The most prominent advantage of using vinyl resin instead of epoxy resin is to reduce blade cost. The current price of vinyl resin is about 30 yuan/kg, and epoxy resin is about 40 yuan/kg. Only the replacement of the blade material can reduce the cost by about 10%. DSM composite resin group Jinling company technical staff said that 10% is only a very conservative estimate. After the blade main material is replaced, the supporting products such as gel coat and other surface protection layers will also be changed accordingly, and the saving effect brought is also considerable.

  Vinyl resin has another advantage in the field of wind power: the cost of molds is very high in blade production. After replacing the hydrogen peroxide with this material, post-curing and other treatments are not required, which will greatly improve the efficiency of mold use. Take the 1.5MW blade as an example, the cost of the mold is about 3 million to 4 million yuan. It takes about two days to produce one blade with epoxy resin as the base material, and only one day with vinyl resin. In addition, because vinyl resin is similar to unsaturated polyester resin, the main material of another blade, it can also draw on the mature process of preparing unsaturated blades from existing unsaturated resins. It is worth mentioning that although vinyl resin has great advantages, its application development is still in its infancy, and domestic and foreign companies are actively carrying out research on the application of vinyl resin on blades.

  Anticorrosion of oil tank is another emerging application field of vinyl resin. Vinyl vinegar resin glass fiber reinforced plastic and its glass flake resin coating have excellent high corrosion resistance, simple construction, and can completely solve the existing anti-corrosion problems of petroleum storage tanks.

   With the high sulfur and heavy quality of my country's imported crude oil, the enlargement of new crude oil tanks, and the layout of crude oil storage depots in coastal areas, the existing oil storage tanks' corrosion protection system has been greatly challenged. The epoxy resin coatings and polyurethane vinegar anticorrosive coatings that were commonly used in the past cannot fully meet the anticorrosion requirements in terms of acid resistance, solvent resistance and heat resistance, especially in the strong corrosive medium.

   It is the base resin that determines the anticorrosion of the paint. Therefore, to change the status quo, we must start with the choice of resin. According to experts, at present, foreign countries generally use high heat resistance, acid resistance and alkali resistance of vinyl vinegar resin glass fiber reinforced plastics and vinyl vinegar glass flake resin coatings to manufacture anticorrosive coatings for petroleum storage tanks, in order to solve the high corrosive crude oil Anti-corrosion problems in steel oil storage tanks. Domestic manufacturers also produce vinyl resins for anti-corrosion of oil tanks, which have achieved good anti-corrosion effects. Anti-corrosion of oil tanks will become a big market for vinyl resins in the future.