Physicochemical performance of metals and concrete structures used in electricity distribution networks: case study in Manaus region

Quimica nova

Freire, Karla Regina Rattmann¹  Joukoski, Alex¹  Portella, Kleber Franke¹  Garcia, Carlos Mario¹  Vergés, Giseli Ribeiro¹  Corrêa, Alcyr de Pinho² 

[1] Instituto de Tecnologia para o Desenvolvimento, Curitiba, Brasil;Manaus Energia S.A., Manaus, Brasil

关键词: paints;    reinforced concrete;    materials for electric energy distribution networks.;   

DOI  :  10.1590/S0100-40422006000400018

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The influenceof natural aging furthered by atmospheric corrosion of parts of electric transformersand materials, as well as of concrete poles and cross arms containing corrosioninhibitors was evaluated in Manaus. Results for painted materials, it couldshowed that loss of specular gloss was more intensive in aliphatic polyurethanepoints than in acrylic polyurethane ones. No corrosion was observed for metaland concrete samples until 400 days of natural aging. Corrosion in steel reinforcementwas noticed in some poles, arising from manufacturing faults, such as low cementcontent, water/cement ratio, thin concrete cover thickness, etc. The performanceof corrosion inhibitors was assessed by many techniques after natural and acceleratedaging in a 3.5% saline aqueous solution. The results show the need for betterchemical component selection and its concentration in the concrete mixture.

【 授权许可】

CC BY