Abstract
Corrosion and particle deposition in the secondary
circuits of pressurized water reactors can be mitigated
by alternative water chemistries featuring film-forming
amines. In the present work, the corrosion of carbon
steel in secondary side water with or without
octadecylamine (ODA) is studied by in situ
electrochemical impedance spectroscopy, combined with
weight loss/gain measurements, scanning electron
microscopy and glow-discharge optical emission
spectroscopy. The impedance spectra are interpreted using
the mixed-conduction model to extract kinetic parameters
of oxide growth and metal dissolution through it. From
the experimental results, it can be concluded that ODA
addition reduces the corrosion rate of both fresh and
pre-oxidized carbon steel in secondary circuit
significantly by slowing down both interfacial reactions
and transport through the oxide layer.
| Original language | English |
|---|---|
| Pages (from-to) | 6037–6046 |
| Journal | Journal of Materials Engineering and Performance |
| Volume | 26 |
| Issue number | 12 |
| Early online date | 2017 |
| DOIs | |
| Publication status | Published - 2017 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- carbon steel
- corrosion mechanism
- octadecylamine
- pressurized water reactor
- secondary circuit