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04-11-2022 | Technical Article

Effect of Gamma Radiation on the Electrochemical Behavior of AISI 8620 Steel Coated with Diamond-Like Carbon

Authors: Raphael Gomes de Paula, Adelina Pinheiro Santos, Renata Braga Soares, Klaus Higor dos Santos Silva, Jefferson Patrício Nascimento, Vanessa de Freitas Cunha Lins

Published in: Journal of Materials Engineering and Performance | Issue 14/2023

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Abstract

Equipment degradation caused by corrosion has become frequent in pressurized water-based nuclear reactors (PWR). The radiation and adverse conditions encountered in the primary circuit of these reactors degrade most non-metallic materials. The growing search for materials with high corrosion resistance, stability and durability has intensified in recent years with a view to improving these industrial systems. In this context, a steel with industrial application AISI 8620 was coated with Diamond-Like Carbon (DLC). The coating was made by the plasma-enhanced chemical vapor deposition (PECVD) technique and subsequently irradiated with gamma rays. The morphology and physicochemical characterizations of the steel surfaces coated with the DLC film were evaluated by atomic force microscopy (AFM), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and Raman scattering spectroscopy. The electrochemical behavior was evaluated by using electrochemical impedance spectroscopy. The analysis indicated increased corrosion potential and a higher charge transfer resistance for coated and irradiated steel.

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Metadata
Title
Effect of Gamma Radiation on the Electrochemical Behavior of AISI 8620 Steel Coated with Diamond-Like Carbon
Authors
Raphael Gomes de Paula
Adelina Pinheiro Santos
Renata Braga Soares
Klaus Higor dos Santos Silva
Jefferson Patrício Nascimento
Vanessa de Freitas Cunha Lins
Publication date
04-11-2022
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 14/2023
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-022-07561-2

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