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Wettability Testing of Stranded Aluminium Conductors

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Abstract:

High voltage bare conductor surfaces were tested by spray method of IEC TS 63073. Theconductors have different surface properties: a standard conductor with untreated surface, a paintedone, a sand-blasted surface and three old conductors after long service life was tested. The oldconductors operate in significantly different areas of Hungary which makes the surfacecontamination and the rate of atmospheric corrosion different. For comparable tests specializedequipment was developed, which makes the spray test in the same way and with same parameters inall tests. The equipment contains digital cameras to make photos from the conductor’s surfacewhich can be compared to the chart of technical specification. The tests were conducted usingdifferent water qualities. The surface treated and old conductors show good hydrophilicity in alltests while the untreated and painted conductors wettability was wrong. The related technicalspecification designates classes where HC7 means the water film on the surface, while HC1 meanslarge drops of water on the surface. The surface treatment makes HC7 class surface of theconductors. The contamination and atmospheric corrosion also make HC6-HC7 class surface. Theas-manufactured or painted surface were evaluated as HC2-HC4. Acidic additions make thewettability class larger.

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Periodical:

Materials Science Forum (Volume 1198)

Pages:

99-104

DOI:

https://doi.org/10.4028/p-39txqG

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Online since:

August 2026

Authors:

Szilvia Gyöngyösi, Mária Mészáros*, Csilla Enikő Czégéni

Keywords:

Aluminum, High Voltage Conductor, Service Life, Surface Treatment, Wettability

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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