| Autor: |
Ki Tae Kim, Young Sik Kim, B. T. Lim, Min Gi Kim, Hyun Young Chang |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
ECS Meeting Abstracts. :1167-1167 |
| ISSN: |
2151-2043 |
| DOI: |
10.1149/ma2020-0281167mtgabs |
| Popis: |
Generally, indirect assessment of external corrosion of pipe has been undertaken as a 2 step process using a close interval potential survey (CIPS) performed to determine the level of cathodic polarization and a direct current voltage gradient (DCVG) survey to determine the location of coating defects on the pipes buried in the soil. Usually, two techniques are used separately, but there are several advantages to undertaking a combined CIPS and DCVG survey. However, since detection conditions depend upon the experience skill of the experts, the reliability to detect the coating flaw on pipes buried in the soil was low level. This work focused on the deduction of detection voltage to get 100% reliabilty of coating flaw detection on pipes buried in the soil. Test bed with 3 layered pipelines was constructed, and cathodic protection system was real-time monitored. The material of buried pipe was one kind of ‘polyken coated steel pipe’. The burial depths of pipes were from 1 to 3 meters and coating flaws on the pipes were intentionally formed. The effect of applied voltage on the detection reliability of coating flaw on buried pipe in soil was elucidated. The applied voltage to detect the coating flaws is dependent upon the amount of buried pipes and soil condition etc. The detection potential to get 100 % detection reliability can be calculated using the newly proposed equation. (This work was supported by the Nuclear Power Core Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20171520000350)) |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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