Abstract

SANDOVAL-AMADOR, Anderson Andrés; PENA-BALLESTEROS, Darío Yesid  and  PIRATONA-MORALES, Ulises. Evaluation of corrosion resistance on coatings obtained by sputtering of a chromiun cathode by electrochemical techniques. Iteckne [online]. 2014, vol.11, n.2, pp.183-189. ISSN 1692-1798.

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.

Keywords : AISI H13; EIS; sputtering; Tafel; corrosion rate.

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