Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
DEVELOPMENT AND USE OF COMPOSITE Nb2O5|Al AS COATING APPLIED BY THERMAL SPRAY ON 1020 AISI STEEL PROTECTION AGAINST CORROSION CAUSED BY SOIL IN BURIED STRUCTURES
Submission Author:
Sandra Mara Kaminski Tramontin , PR
Co-Authors:
Oscar Junior, Sandra Mara Kaminski Tramontin, Luciano Lourençato
Presenter: Oscar Junior
doi://10.26678/ABCM.COBEM2019.COB2019-0488
Abstract
In this study the Nb2OǀAl corrosion resistance coating was developed and applied using a powder flame spray process on a AISI 1020 steel substrate. A galvanostatic electrochemical technique was employed with and without ohmic drop, in four different soils. These soils presented two different behaviors with respect to corrosiveness, two aggressive and two less aggressive. In order to compare the behavior of the coatings in different soils a cathodic hydrogen reduction reaction (equilibrium potential, overvoltage and exchange current density) was studied with emphasis on the effect of the ohmic drop.
Keywords
soil corrosion, surface coating, Nb2O5 coat
