MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Corrosion Behavior of Alloy 600 Coupled with Electrodeposited Magnetite in Simulated Secondary Water of PWRs
Soon-Hyeok JeonGeun-Dong SongDo Haeng Hur
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2015 Volume 56 Issue 12 Pages 2078-2083

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Abstract

The corrosion behavior of Alloy 600 coupled with magnetite was investigated in simulated secondary water of pressurized water reactors using a potentiodynamic polarization test and zero-resistance ammeter. Passive film formed on the surface of Alloy 600 was also analyzed using X-ray photoelectron spectroscopy. Alloy 600 was the anodic element of the galvanic pair since its corrosion potential was less noble than that of the magnetite. Galvanic coupling increased the corrosion current density of Alloy 600 due to the shifting of the potential of Alloy 600 to the positive value. The passive film of coupled Alloy 600 was more slowly stabilized and was thinner and less protective than that of non-coupled Alloy 600.

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© 2015 The Japan Institute of Metals and Materials
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