Efficient Protective Coatings of Tubing Strings under the Harsh Conditions of Oil and Gas Extraction
Based on thorough investigation of properties of diffusion zinc coatings and performance tests of diffusion zinc coated lifting pipes, it was shown that such coatings are promising in ensuring protection of tubes and equipment operated in hard conditions of oil and gas production. Application of such coatings not only increases corrosion resistance of tubes but also improves service reliability and life of lifting pipes and their threaded joints. The innovational solution in corrosion protection of lifting pipes consists in the use of the protective ‘duplex system’ which is a combination of a diffusion zinc coating (protective layer) and а top layer of polymer coating (barrier layer).