Abstract
The main mechanisms of destruction of internal anticorrosive polymer coatings (IACPC) of the inner surface of tubing and fielding pipes are review in the article. They are divide into decompression peeling, substrate destruction under the corrosion of and natural aging of the polymeric basis. A critical analysis of the existing standards for the testing of internal anticorrosive coatings was made. The carrying out test on these documents does not allow obtaining the destructions identical to those found during the exploitation of pipelines. Investigations on the selection of optimal regimes of autoclave tests and the methodology for conduct research are describe. A comparison for the results of laboratory and experimental field tests of the coatings presented.
Highlights
Annual metal losses due to corrosion account for up to 12% of the total mass of the metal-fund, which corresponds to a loss of up to 30% of annual metal production in the Russian Federation [1]
Experience in the development of oil-fields in Western Siberia talk that the intensity of development by the corrosion damages to the internal surface of field pipelines is associated with an increase in the number of mechanical impurities in pumped product, changes in the ion composition of mining bedded water, flow regimes and significant bio-contamination of the oil-fields. This explains the growing need for corrosion protection methods for the internal surface of pipelines including the use of the internal anticorrosive polymer coatings (IACPC)
This criterion has been adopted by most of the Russian oil companies, there has been a trend towards tightening it
Summary
Annual metal losses due to corrosion account for up to 12% of the total mass of the metal-fund, which corresponds to a loss of up to 30% of annual metal production in the Russian Federation [1]. Experience in the development of oil-fields in Western Siberia talk that the intensity of development by the corrosion damages to the internal surface of field pipelines is associated with an increase in the number of mechanical impurities in pumped product, changes in the ion composition of mining bedded water, flow regimes and significant bio-contamination of the oil-fields This explains the growing need for corrosion protection methods for the internal surface of pipelines including the use of the IACPC. Along with the increase in the use of IACPC, there is a need to ensure and control the quality of the supplied products Decision of this problem requires a complex approach, including the development of techniques for laboratory tests taking into account the specific exploitative conditions of the field pipelines. The authors analyzed a large number of causes of failures of the tubing and field pipelines and highlighted the main mechanisms of IACPC destruction during exploitation: decompression peeling of the coating, corrosive destruction of the substrate metal, aging of the polymeric basis, which confirms the conclusions made in work [7]
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