Evaluation of corrosion resistance on coatings obtained by sputtering of a chromiun cathode by electrochemical techniques
DOI:
https://doi.org/10.15332/iteckne.v11i2.731Keywords:
AISI H13, EIS, sputtering, Tafel, corrosion rateAbstract
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.
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