Development of Nb2O5|Cu composite as AISI 1020 steel thermal spray coating for protection against corrosion by soil in buried structures

Química Nova

Instituto de Tecnologia para o Desenvolvimento, Curitiba, Brasil¹  Silva, José Maurílio da¹  Paredes, Ramon Sigifredo Cortes¹  Portella, Kleber Franke¹  Universidade Federal do Paraná, Curitiba, Brasil¹  Regis Junior, Oscar¹  Universidade Tecnológica Federal do Paraná, Ponta Grossa, Brasil¹ 

关键词: soil corrosion;    surface coating;    Nb2O5.;   

DOI  :  10.1590/S0100-40422012000800005

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

An Nb2O|Cu corrosion-resistant coating was developed and applied onto AISI 1020 steel substrate by Powder Flame Spray. A galvanostatic electrochemical technique was employed, with and without ohmic drop, in four different soils (two corrosively aggressive and two less aggressive). Behavior of coatings in different soils was compared using a cathodic hydrogen reduction reaction (equilibrium potential, overvoltage and exchange current density) focusing on the effect of ohmic drop. Results allow recommendation of Nb2O5|Cu composite for use in buried structure protection.

【 授权许可】

Unknown