2015 Fiscal Year Final Research Report
Study on the Mechanisms of Under-film Corrosion in the Upper Part of Water Ballast Tanks
| Project/Area Number |
25289318
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Naval and maritime engineering
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
OSAWA NAOKI 大阪大学, 工学(系)研究科(研究院), 教授 (90252585)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TAKADA Atsushi 海上技術安全研究所, 研究員 (90470054)
KOJIMA Ryuji 海上技術安全研究所, 研究員 (70392694)
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Keywords | 塗膜下腐食 / バラストタンク / エポキシ塗料 / 鉄2価イオン / 蛍光プローブ / セルオートマトン / スクライブ試験板 / エッジ腐食 |
|---|
| Outline of Final Research Achievements |
Effectiveness of fluorescent ferric ion indicator “RhoNox-1” for under film corrosion detection of coated steel panels in water ballast tank is examined. Under film corrosion sensing semi-transparent modified epoxy films which contains RhoNox-1 are prepared. It is found that RhoNox-1 is not responsive to amine-based hardener, and steel's anode reactions in under-film corrosion had been detected clearly by using the developed Fe2+ sensing paint.
An under-film corrosion simulation method for epoxy coated steel panels in water ballast tanks (WBT) based on 2-dimensional cellular automaton has been developed. The change in corroded surface shape of epoxy coated and scribed steel panels made of conventional steel and corrosion resistant steel (CRS) exposed in WBT is simulated, and the effectiveness of the developed simulation method is demonstrated by comparing simulated and measured corroded surface profiles.
|
| Free Research Field |
船舶海洋工学
|
