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Evaluation of Corrosion Resistance of Thin Films Formed on AISI 316L Steel by Plasma Using Hastelloy as Cathodic Cage
Author(s) -
Monção Renan Matos,
Júnior Edgar Alves Araújo,
Bandeira Rafael Marinho,
de Abreu Lima Caíque Diego,
da Luz Lima Cleânio,
Feitor Michelle Cequeira,
de Carvalho Costa Thércio Henrique,
de Sousa Rômulo Ribeiro Magalhães
Publication year - 2021
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.202000578
Subject(s) - cathodic protection , materials science , corrosion , scanning electron microscope , metallurgy , raman spectroscopy , thin film , substrate (aquarium) , composite material , anode , electrode , chemistry , nanotechnology , physics , oceanography , optics , geology
Herein, the use of Hastelloy C‐276 as a cathodic cage for the deposition of thin films on the AISI 316L steel substrate by plasma is investigated. The films are processed through floating potential at 350, 375, 400, and 425 °C for 4 h, using a hydrogen–nitrogen mixture in the proportion of 40% and 60%, respectively. The thin films are investigated by X‐ray diffraction, scanning electron microscopy, Raman spectroscopy, and potentiodynamic polarization. The spectroscopy results point out the formation of different phases such as FeNi 3 , CrNi, and MoN 1/2 . Films acquired at 375 ºC present superior corrosion resistance with less negative corrosion potential (−0.020 V). The increase and decrease in FeNi 3 and CrNi contents follow the improvement of the applied temperature, which is unbeneficial to the corrosion resistance of the films.