Comparison of different methods for quality assessment of internal anticorrosive polymer coating of oil pipes

Present article discusses the various methods of testing of internal anti-corrosion polymer coating of pipeline. It is shown how long exposures in 3% solution of NaCl and in crude oil at a temperature of +80 ° C, and cycling impact of temperature -60 ° C... +60 ° C and a thermal effect at a temperature of 60C affects to the direct impact resistance and adhesion strength of coatings. Main patterns of change of these parameters are presented. Autoclave test procedure, which can simulate fractures identical to detectioned in a real operation of coated pipelines is proposed. The advantages of this technique in comparison with other procedures are shown.