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

Materials Research

Anderson De Oliveira Fraga²  Marcos Antonio Klunk²  Adriano Agnoletto De Oliveira¹  Gilnei Gonçalves Furtado¹  Gerhard Knörnschild²  Luís Frederico Pinheiro Dick² 

[1] ,Universidade Federal do Rio Grande do Sul Departamento de Metalurgia Laboratório de Processos Eletroquímicos & CorrosãoPorto Alegre RS ,Brasil

关键词: soil corrosion;    weight loss;    AC corrosion;    chemical descaling;   

DOI  :  10.1590/1516-1439.305714

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License