2012 Fiscal Year Final Research Report
A resource-saving technology for high corrosion-resistant steels by improving electrochemical property of non-metallic inclusions
| Project/Area Number |
23656447
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Material processing/treatments
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
MUTO Izumi 東北大学, 大学院・工学研究科, 准教授 (20400278)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HARA Nobuyoshi 東北大学, 大学院・工学研究科, 教授 (40111257)
SUGAWARA Yu 東北大学, 大学院・工学研究科, 助教 (40599057)
AKAO Noboru 東北大学, 大学院・工学研究科, 助手 (80222503)
|
|---|
| Project Period (FY) |
2011 – 2012
|
| Keywords | 腐食防食 |
|---|
| Research Abstract |
To analyze microscopic corrosion mechanisms of metals, a microelectrochemical system for in situ high-resolution optical microscopy was developed and applied to the real-time observation of pit initiation at MnS inclusion in stainless steels. It was directly observed that pits were initiated at the MnS/steel boundaries, and that deep trenches were generated at these boundaries during anodic polarization. The metal-oxide enriched surface layer on inclusions was found to be the predominant factor affecting the electrochemical properties and the corrosion protection ability of the inclusions.
|
