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Journal of Chinese Society for Corrosion and protection  2023, Vol. 43 Issue (1): 22-28    DOI: 10.11902/1005.4537.2022.039
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Research Progress on Monitoring Techniques for Corrosion Under Insulating Layer
WANG Weijie1,2, HAN Jicheng1,2, MAO Yang3, GUAN Zichao1,2(), DI Zhigang1,2, MIAO Lei1,2, MA Shengjun1,2
1.CNOOC Energy Technology & Services Limited Key Laboratory of Corrosion Protection for Offshore Oil Industry, Changzhou 213016, China
2.CNOOC Changzhou Paint and Coatings Industry Research Institute Co. Ltd., Changzhou 213016, China
3.PetroChina Sichuan Petrochemical Co. Ltd., Pengzhou 611930, China
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Abstract  

This paper reviews the research status of several technologies such as electrochemical noise, capacitive imaging, radio frequency identification, infrared thermography, distributed fiber optics, microwave, etc. in the application of monitoring and detection of corrosion under insulating layer (CUI). According to the history of the concerned CUI risks, the adopted CUI monitoring and detection technologies can be classified as three kinds, which are related to premise-, middle- and late-stages of the CUS risks to be examined respectively. It is discussed that the monitoring and detection technology for premise-stage is used to speculate the tendency of CUI, the monitoring and detection technology for later-stage can only detect the irreversible damage of metal loss to a certain extent. At the present, CUI monitoring and detection technology still has the problem in the inadequate data interpretation, while the accuracy and precision of the technology itself need to further be improved. This paper looks forward also to the future research direction in this field.

Key words:  corrosion under insulation      supervisory inspection techniques      corrosion and protection     
Received:  14 February 2022      32134.14.1005.4537.2022.039
ZTFLH:  TG172  
Fund: Leading Innovative Talents Introduction and Cultivation Project of Changzhou(CQ20210028)

Cite this article: 

WANG Weijie, HAN Jicheng, MAO Yang, GUAN Zichao, DI Zhigang, MIAO Lei, MA Shengjun. Research Progress on Monitoring Techniques for Corrosion Under Insulating Layer. Journal of Chinese Society for Corrosion and protection, 2023, 43(1): 22-28.

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https://www.jcscp.org/EN/10.11902/1005.4537.2022.039     OR     https://www.jcscp.org/EN/Y2023/V43/I1/22

Fig.1  Principal of near field inductive coupling between readers coil and trans-ponder coil
Fig.2  Schematic diagram of the two imaging techniques[41]
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