SANDOVAL AMADOR, ANDERSON ANDRES, Yesid Pena-Ballesteros, Dario , Piratona-Morales, Ulises
No
Rev. Iteckne
Article
Científica
01/07/2014
000420745700008
The corrosion resistance of coatings obtained by sputtering of a chromium target on substrates of steel AISI H13 was evaluated. Through the analysis of electrochemical impedance spectroscopy (EIS) and Tafel polarization curves in a solution of 3% NaCl by weight was found that these coatings have a corrosion rate lower than the substrate. Moreover, EIS data fit an equivalent electrical circuit that contains two constant phase elements; this is typical circuit for interpreting the behavior of a metal electrode on which has been deposited an insulating and porous coating.
AISI H13; EIS; sputtering; Tafel; corrosion rate