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Open AccessArticle

Magnetite-Accelerated Corrosion of SA508 Tubesheet Material and Its Effect on Steam Generator Tube Denting

Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon 34057, Korea
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Coatings 2019, 9(9), 575; https://doi.org/10.3390/coatings9090575
Received: 7 August 2019 / Revised: 3 September 2019 / Accepted: 6 September 2019 / Published: 9 September 2019
(This article belongs to the Special Issue Corrosion Science and Surface Engineering)
The objective of this work is to investigate the magnetite-accelerated corrosion phenomenon of SA508 used as tubesheet material in simulated secondary side environments of pressurized water reactors through immersion and electrochemical tests. The presence of sulfate ions induced the fast growth of a corrosion product layer on SA508, and this phenomenon was accelerated when the SA508 was coupled to magnetite. From the perspective of electrochemical behavior, it was found that SA508 behaves as an anodic member in the coupling system with magnetite, resulting in an increased corrosion rate. View Full-Text
Keywords: tubesheet; steam generator; magnetite; galvanic couple tubesheet; steam generator; magnetite; galvanic couple
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Song, G.D.; Han, J.; Jeon, S.-H.; Hur, D.H. Magnetite-Accelerated Corrosion of SA508 Tubesheet Material and Its Effect on Steam Generator Tube Denting. Coatings 2019, 9, 575.

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