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ISSN(Print): 1598-6462
ISSN(Online): 2288-6524
Issue: Bimonthly (2,4,6,8,10,12)
Type: Journal
Language: English/Korean
History: v1 n1 Feb. 2002
Index:ESCI (since 2017)
KCI (since 2019)
Scopus (since 2019)
Date: December 31, 2020
Vol: 19, Issue: 6
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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[Research Paper]
Investigation of Optimum Cathodic Protection Potential to Prevent Erosion with a Flow Rate of AA5083-H321 for Marine Vessels
선박용 AA5083-H321의 유속에 의한 침식손상 방지를 위한 최적 음극방식전위 규명
Sang-Ok Chong, Il-Cho Park, Seong-Jong Kim
정상옥, 박일초, 김성종
Keywords: Erosion-corrosion, Aluminium alloy, Seawater, Flow rate
Corros. Sci. Tech. , 2020, 19(6) pp. 288-295
® 10.14773/CST.2020.19.6.288
Web Viewer Full-Text Download (3.0 MB)
Received: October 06, 2020;  Revised: December 02, 2020;  Accepted: December 02, 2020
Abstract:
This study investigated the erosion-corrosion characteristics of 5038-H321 aluminum alloy in a natural seawater solution through various electrochemical experiments and flow rate parameters. Cathodic polarization experiments were conducted at flow rates ranging from 4 to 12 knots. Considering the concentration polarization section representing a relatively low current density, the range of the potentiostatic experiment was determined to be -1.6 to -1.0 V. The potentiostatic experiment was conducted at various potentials for 180 minutes in seawater. After the experiment, the corrosion characteristics were evaluated by observing surface morphology and measuring surface roughness. As a result, as the applied potential was lower, the amount of calcareous deposits increased and the roughness tended to increase. On the other hand, it was confirmed that the roughness was larger in the static condition than the flow rate condition due to the influence of the flow velocity. Variations in the chemical composition with flow rate variations were analyzed by energy-dispersive spectroscopy (EDS). In conclusion, the cathodic potential of AA5083-H321 in seawater was determined to be -1.0 V.
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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