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Sacrificial copper strip sensors for sulfur corrosion detection in transformer oils

Sacrificial copper strip sensors for sulfur corrosion detection in transformer oils
Sacrificial copper strip sensors for sulfur corrosion detection in transformer oils

Existing protocols (e.g., ASTM D 1275-B standard test method) applied to detect and monitor sulfur corrosion in transformer insulating oils are imprecise as it depends on visual observation. As a solution, thin-film sacrificial copper strips are proposed as a corrosive sulfur sensor. A two-level factorial design is utilized to investigate the significant effect of area and thickness upon the sensor's transformation resistance values. Next, a regression model is developed to estimate the sensor's transformation resistance values as functions of area and thickness. The resultant outputs from the two-level factorial design revealed that area, as a variable, exhibited higher significance at 90.19%, compared to either thickness or interaction between area and thickness. The proposed regression model obtained from two-level factorial design is significant in describing the trend displayed by the sensor's transformation resistance values. Finally, this paper details the clear correlation between the sensor's transformation resistance values and elemental sulfur concentration.

4-Wire measurement, Corrosion sensor, Factorial design, Sulfur, Thin-film copper
0263-2241
1-6
Ahmad Khiar, M. S.
f22e8b29-4a31-40b8-b393-23e31e972b54
Brown, R.C.D.
21ce697a-7c3a-480e-919f-429a3d8550f5
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Ahmad Khiar, M. S.
f22e8b29-4a31-40b8-b393-23e31e972b54
Brown, R.C.D.
21ce697a-7c3a-480e-919f-429a3d8550f5
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e

Ahmad Khiar, M. S., Brown, R.C.D. and Lewin, P.L. (2019) Sacrificial copper strip sensors for sulfur corrosion detection in transformer oils. Measurement: Journal of the International Measurement Confederation, 148, 1-6, [106887]. (doi:10.1016/j.measurement.2019.106887).

Record type: Article

Abstract

Existing protocols (e.g., ASTM D 1275-B standard test method) applied to detect and monitor sulfur corrosion in transformer insulating oils are imprecise as it depends on visual observation. As a solution, thin-film sacrificial copper strips are proposed as a corrosive sulfur sensor. A two-level factorial design is utilized to investigate the significant effect of area and thickness upon the sensor's transformation resistance values. Next, a regression model is developed to estimate the sensor's transformation resistance values as functions of area and thickness. The resultant outputs from the two-level factorial design revealed that area, as a variable, exhibited higher significance at 90.19%, compared to either thickness or interaction between area and thickness. The proposed regression model obtained from two-level factorial design is significant in describing the trend displayed by the sensor's transformation resistance values. Finally, this paper details the clear correlation between the sensor's transformation resistance values and elemental sulfur concentration.

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Sacrificial copper strip sensors for sulfur corrosion detection in transformer oils - Accepted Manuscript
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More information

Accepted/In Press date: 30 July 2019
e-pub ahead of print date: 2 August 2019
Published date: 1 December 2019
Keywords: 4-Wire measurement, Corrosion sensor, Factorial design, Sulfur, Thin-film copper

Identifiers

Local EPrints ID: 433896
URI: http://eprints.soton.ac.uk/id/eprint/433896
ISSN: 0263-2241
PURE UUID: 8433c254-4d27-4743-bebc-b465bee7b1a3
ORCID for R.C.D. Brown: ORCID iD orcid.org/0000-0003-0156-7087
ORCID for P.L. Lewin: ORCID iD orcid.org/0000-0002-3299-2556

Catalogue record

Date deposited: 05 Sep 2019 16:30
Last modified: 03 Dec 2021 02:35

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Contributors

Author: M. S. Ahmad Khiar
Author: R.C.D. Brown ORCID iD
Author: P.L. Lewin ORCID iD

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