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Study of Localized Corrosion Susceptibility of Ni-Based Superalloys Employing Electrochemical Noise Technique.

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Title: Study of Localized Corrosion Susceptibility of Ni-Based Superalloys Employing Electrochemical Noise Technique.
Authors: Almeraya-Calderon, Facundo1 (AUTHOR), Huerta-Zavala, Miguel Sergio1,2 (AUTHOR), Maldonado-Bandala, Erick2,3 (AUTHOR), Nieves-Mendoza, Demetrio2,4 (AUTHOR), Jaquez-Muñoz, Jesus Manuel3,5 (AUTHOR), Baltazar-Zamora, Miguel Angel1,2 (AUTHOR), Landa-Ruiz, Laura2 (AUTHOR), Estupinan-Lopez, Francisco1,3 (AUTHOR), Olguin-Coca, Javier4 (AUTHOR), Flores-De los Rios, Juan Pablo5 (AUTHOR), Gaona-Tiburcio, Citlalli1 (AUTHOR) citlalli.gaonatbr@uanl.edu.mx
Source: Materials (1996-1944). Jun2026, Vol. 19 Issue 11, p2424. 24p.
Subjects: Pitting corrosion, Inconel, Corrosion & anti-corrosives, Nickel-chromium alloys, Seawater corrosion
Abstract: Inconel superalloys are employed in demanding components of different equipment. However, they can be exposed to atmospheric corrosion systems, such as marine and industrial environments. This research is focused on studying the localized corrosion susceptibility of Inconel 600, 690 and 718 exposed to H2SO4, 1 wt.% and 3.5 wt. % NaCl solutions, simulating marine and industrial atmospheres at 25 ± 0.5 °C. Localized corrosion behavior was characterized by electrochemical noise (EN) and cyclic potentiodynamic polarization (CPP) curves according to ASTM 6-199 ASTM G61 standards. The EN technique was analyzed through time series and analysis for chaotic systems, such as Hurst, Lyapunov and Husdorff coefficients, to determine the corrosion type of each system to reduce the uncertainty in common statistical analysis. The EN results show how Inconel superalloys tend to present localized attacks, being more notorious in NaCl. The application of specialized methods such as Hurst and Lyapunov helped to determine the corrosion system when alloys were characterized by EN. The results indicated that all superalloys exhibit positive hysteresis under CPP, indicating susceptibility to localized pitting corrosion. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Study of Localized Corrosion Susceptibility of Ni-Based Superalloys Employing Electrochemical Noise Technique.
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jun2026, Vol. 19 Issue 11, p2424. 24p.
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  Data: <searchLink fieldCode="DE" term="%22Pitting+corrosion%22">Pitting corrosion</searchLink><br /><searchLink fieldCode="DE" term="%22Inconel%22">Inconel</searchLink><br /><searchLink fieldCode="DE" term="%22Corrosion+%26+anti-corrosives%22">Corrosion & anti-corrosives</searchLink><br /><searchLink fieldCode="DE" term="%22Nickel-chromium+alloys%22">Nickel-chromium alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Seawater+corrosion%22">Seawater corrosion</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Inconel superalloys are employed in demanding components of different equipment. However, they can be exposed to atmospheric corrosion systems, such as marine and industrial environments. This research is focused on studying the localized corrosion susceptibility of Inconel 600, 690 and 718 exposed to H2SO4, 1 wt.% and 3.5 wt. % NaCl solutions, simulating marine and industrial atmospheres at 25 ± 0.5 °C. Localized corrosion behavior was characterized by electrochemical noise (EN) and cyclic potentiodynamic polarization (CPP) curves according to ASTM 6-199 ASTM G61 standards. The EN technique was analyzed through time series and analysis for chaotic systems, such as Hurst, Lyapunov and Husdorff coefficients, to determine the corrosion type of each system to reduce the uncertainty in common statistical analysis. The EN results show how Inconel superalloys tend to present localized attacks, being more notorious in NaCl. The application of specialized methods such as Hurst and Lyapunov helped to determine the corrosion system when alloys were characterized by EN. The results indicated that all superalloys exhibit positive hysteresis under CPP, indicating susceptibility to localized pitting corrosion. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/ma19112424
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        Text: English
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    Subjects:
      – SubjectFull: Pitting corrosion
        Type: general
      – SubjectFull: Inconel
        Type: general
      – SubjectFull: Corrosion & anti-corrosives
        Type: general
      – SubjectFull: Nickel-chromium alloys
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      – SubjectFull: Seawater corrosion
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      – TitleFull: Study of Localized Corrosion Susceptibility of Ni-Based Superalloys Employing Electrochemical Noise Technique.
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              Text: Jun2026
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              Y: 2026
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