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

Química Nova

Instituto de Tecnologia para o Desenvolvimento, Curitiba, Brasil¹  Freire, Karla Regina Rattmann¹  Joukoski, Alex¹  Portella, Kleber Franke¹  Corrêa, Alcyr de Pinho¹  Garcia, Carlos Mario¹  Vergés, Giseli Ribeiro¹  Manaus Energia S.A., Manaus, Brasil¹ 

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 influence of natural aging furthered by atmospheric corrosion of parts of electric transformers and materials, as well as of concrete poles and cross arms containing corrosion inhibitors was evaluated in Manaus. Results for painted materials, it could showed that loss of specular gloss was more intensive in aliphatic polyurethane points than in acrylic polyurethane ones. No corrosion was observed for metal and concrete samples until 400 days of natural aging. Corrosion in steel reinforcement was noticed in some poles, arising from manufacturing faults, such as low cement content, water/cement ratio, thin concrete cover thickness, etc. The performance of corrosion inhibitors was assessed by many techniques after natural and accelerated aging in a 3.5% saline aqueous solution. The results show the need for better chemical component selection and its concentration in the concrete mixture.

【 授权许可】

Unknown