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Electrochemical noise sensor for metal pipeline outer surface corrosion detection

An electrochemical noise and corrosion detection technology, applied in scientific instruments, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve problems such as difficulty in electrochemical detection, and achieve long-distance corrosion detection and convenient operation.

Inactive Publication Date: 2017-09-26
TIANJIN UNIV
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Problems solved by technology

However, the pipeline is generally exposed to the atmospheric environment, and there is no electrolyte solution, so it is difficult to directly perform electrochemical detection, and there are no related reports

Method used

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  • Electrochemical noise sensor for metal pipeline outer surface corrosion detection
  • Electrochemical noise sensor for metal pipeline outer surface corrosion detection

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Experimental program
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Embodiment Construction

[0010] An electrochemical noise sensor for detecting corrosion on the outer surface of a pipeline is carried out according to the following steps:

[0011] figure 1 It is a schematic diagram of the electrochemical detection sensor for corrosion on the outer surface of the pipeline. The sensor mainly includes a cavity 1, a reference electrode 2, a counter electrode 5, an electrical contact 4 that is in direct contact with the outer surface of the metal pipe to be tested, and a magnet support 3. It is characterized in that a magnet is fixed at the lower end of the magnet support 3. . The working electrode electrical contact 4 directly communicates electrically with the surface of the metal pipeline to be tested. In order to build a test circuit during the test, a layer of filter paper is placed between the sensor reference electrode 2 and the counter electrode 5 and the steel surface to be tested. The pillar is connected with the housing through threads, and the distance betw...

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Abstract

The invention relates to an electrochemical noise sensor for metal pipeline outer surface corrosion detection. The electrochemical noise sensor comprises a shell (1), a reference electrode (2), a counter electrode (5), an electric contact (4) directly contacted with the surface of a pipeline to be detected, and an adjustable support pillar (3). The reference electrode (2) and the counter electrode (5) are fixedly connected with the lower part of the shell (1); the adjustable support pillar (3) and the shell (1) are fixedly connected; the lower ends of the reference electrode (2) and the counter electrode (5) are isolated from a steel pipeline to be detected through wetting filter paper; the upper part of the support pillar (3) is connected with the shell; the distances from the reference electrode (2) and the counter electrode (5) to the metal surface to be detected is adjusted through adjusting the length of the adjustable support pillar.

Description

technical field [0001] The invention relates to an electrochemical noise sensor used for corrosion detection on the outer surface of pipelines, belonging to the field of non-destructive detection. Background technique [0002] Metal pipes are exposed to the outdoor or indoor atmospheric environment for a long time. When there are corrosive ions such as chloride ions in the exposed environment, pitting corrosion and other corrosion phenomena will occur in the metal pipes. The further development of pitting corrosion will endanger the quality of stainless steel pipes in service. reliability. Therefore, the corrosion monitoring and detection of metal pipelines has important guiding significance for service reliability evaluation. However, pipelines are generally exposed to the atmosphere without an electrolyte solution, so it is difficult to perform electrochemical detection directly, and no related reports have been seen. Contents of the invention [0003] The purpose of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02
CPCG01N17/006G01N17/02
Inventor 宋诗哲石江波姜国兴夏大海
Owner TIANJIN UNIV
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