Device and method for measuring breakage rate of inner wall coating of pipeline

Abstract

The invention belongs to the field of anticorrosion and antifouling, and relates to a device and a method for measuring the breakage rate of a coating inner wall of a pipeline, and is combined with acathode protection system for an impressed current. The device comprises a flange plate (1), an electrode probe (2), a flange base (3) welded on the pipeline, and a potentiostat (8). The flange plate(1), which carries the electrode probe (2), is connected and sealed to the flange base (3) through bolts. The electrode probe (2) is intended to obtain a current signal flowing through the device. Thecurrent is combined with the output current of the cathode protection system of the pipeline, so that the coating breakage rate of the inner wall of the pipeline can be calculated. According to the device and the method for measuring the breakage rate of the inner wall coating of the pipeline, the device can monitor online and measure the breakage condition of the coating on the inner wall of thepipeline where a cathode protection and anticorrosive system has been installed; and can measure the breakage rate of the inner and surface coating. The device is easy to install, does not need to replace, and can monitor online. The method is simple, and the calculation result is better matched with the actual situation.

Description

technical field [0001] The invention belongs to the field of anti-corrosion and anti-fouling, and in particular relates to a device and method for measuring the damage rate of the coating on the inner wall of a pipeline, which is used in conjunction with an impressed current cathodic protection system. Background technique [0002] The inner walls of seawater pipelines on ships and offshore platforms are required to be coated with anti-corrosion, anti-fouling, heat insulation and other requirements. However, there is currently no instrument that can directly measure the damage of the inner wall coating, making it impossible for the staff to judge when the coating should be applied. layer to repair. With the advancement of anti-corrosion technology, impressed current cathodic protection systems have been installed on many seawater pipelines in recent years, and the anti-corrosion effect of coatings has weakened. However, for some coatings with anti-fouling and heat insulation...

AI Technical Summary

Problems solved by technology

[0002] The inner walls of seawater pipelines on ships and offshore platforms are required to be coated with anti-corrosion, anti-fouling, heat insulation and other requirements. However, there is currently no instrument that can directly measure the damage of the inner wall coating, making it impossible for the staff to judge when the coating should be applied. layer to patch

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