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Soil corrosion of the AISI1020 steel buried near electrical power transmission line towers

By Anderson de Oliveira Fraga, Marcos Antonio Klunk, Adriano Agnoletto Oliveira, Gilnei Goncalves Furtado, Gerhard Hans Knörnschild and Luis Frederico Pinheiro Dick

Abstract

Soil corrosion of carbon steel samples buried up to hundred days close to a high voltage power transmission line tower was examined by weight loss vs. time. A higher weight loss was observed if the samples were electrically connected to the tower than if they were not. This was attributed to the influence of alternating current (AC) signals induced in the soil by the transmission line. This field study showed for the first time the influence of the AC power line on the buried structure of the tower, while other studies so far were focused only on AC corrosion of cathodically protected coated pipelines, running parallel to the transmission line. An improved method was used to measure weight loss by descaling in Clark solution. The new method substitutes discontinuous measurements, proposed in the ASTM-G1-90 standard, by in situ measurements of the weight loss during descaling, using a computer controlled microbalance

Topics: Soil corrosion, Engenharia, Weight loss, AC corrosion, Chemical descaling
Year: 2015
OAI identifier: oai:agregador.ibict.br.PC_UFRGS:oai:www.lume.ufrgs.br:10183/117419
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