Potential difference distribution on FLAT plate around semi-ellipsoidal thinning on the back surface

Naoya Tada; Manabu Nohara; Makoto Uchida

doi:10.1115/PVP2014-28684

Potential difference distribution on FLAT plate around semi-ellipsoidal thinning on the back surface

Naoya Tada, Manabu Nohara, Makoto Uchida

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Local wall thinning is one of serious problems in aged power generating plants and is known to occur mainly by Flow Accelerated Corrosion (FAC) and Liquid Droplet Impingement (LDI) erosion. As the thinning grows inside the pipes, it is difficult to detect and evaluate it from the outer surface of pipe. The direct-current potential difference method (DC-PDM) is thought to be a suitable non-destructive technique to monitor the initiation and growth of these damages. In this study, an approximate analysis method of the potential difference around a semi-ellipsoidal thinning on the back surface of flat plate is presented and the accuracy is discussed based on the results obtained by the finite element analyses.

Original language	English
Title of host publication	High-Pressure Technology; ASME NDE Division; 22nd Scavuzzo Student Paper Symposium and Competition
Publisher	American Society of Mechanical Engineers (ASME)
ISBN (Electronic)	9780791846025
DOIs	https://doi.org/10.1115/PVP2014-28684
Publication status	Published - Jan 1 2014
Event	ASME 2014 Pressure Vessels and Piping Conference, PVP 2014 - Anaheim, United States Duration: Jul 20 2014 → Jul 24 2014

Publication series

Name	American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume	5
ISSN (Print)	0277-027X

Other

Other	ASME 2014 Pressure Vessels and Piping Conference, PVP 2014
Country/Territory	United States
City	Anaheim
Period	7/20/14 → 7/24/14

ASJC Scopus subject areas

Mechanical Engineering

Access to Document

10.1115/PVP2014-28684

Cite this

Tada, N., Nohara, M., & Uchida, M. (2014). Potential difference distribution on FLAT plate around semi-ellipsoidal thinning on the back surface. In High-Pressure Technology; ASME NDE Division; 22nd Scavuzzo Student Paper Symposium and Competition (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 5). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/PVP2014-28684

Potential difference distribution on FLAT plate around semi-ellipsoidal thinning on the back surface. / Tada, Naoya; Nohara, Manabu; Uchida, Makoto.
High-Pressure Technology; ASME NDE Division; 22nd Scavuzzo Student Paper Symposium and Competition. American Society of Mechanical Engineers (ASME), 2014. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 5).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Tada, N, Nohara, M & Uchida, M 2014, Potential difference distribution on FLAT plate around semi-ellipsoidal thinning on the back surface. in High-Pressure Technology; ASME NDE Division; 22nd Scavuzzo Student Paper Symposium and Competition. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, vol. 5, American Society of Mechanical Engineers (ASME), ASME 2014 Pressure Vessels and Piping Conference, PVP 2014, Anaheim, United States, 7/20/14. https://doi.org/10.1115/PVP2014-28684

Tada N, Nohara M, Uchida M. Potential difference distribution on FLAT plate around semi-ellipsoidal thinning on the back surface. In High-Pressure Technology; ASME NDE Division; 22nd Scavuzzo Student Paper Symposium and Competition. American Society of Mechanical Engineers (ASME). 2014. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP). doi: 10.1115/PVP2014-28684

Tada, Naoya ; Nohara, Manabu ; Uchida, Makoto. / Potential difference distribution on FLAT plate around semi-ellipsoidal thinning on the back surface. High-Pressure Technology; ASME NDE Division; 22nd Scavuzzo Student Paper Symposium and Competition. American Society of Mechanical Engineers (ASME), 2014. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP).

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AB - Local wall thinning is one of serious problems in aged power generating plants and is known to occur mainly by Flow Accelerated Corrosion (FAC) and Liquid Droplet Impingement (LDI) erosion. As the thinning grows inside the pipes, it is difficult to detect and evaluate it from the outer surface of pipe. The direct-current potential difference method (DC-PDM) is thought to be a suitable non-destructive technique to monitor the initiation and growth of these damages. In this study, an approximate analysis method of the potential difference around a semi-ellipsoidal thinning on the back surface of flat plate is presented and the accuracy is discussed based on the results obtained by the finite element analyses.

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Potential difference distribution on FLAT plate around semi-ellipsoidal thinning on the back surface

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