2011 Fiscal Year Final Research Report
Hydrogen Embrittlement of High Strength Steels Coated by Aluminum Alloy
| Project/Area Number |
21246107
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
TSURU Tooru 東京工業大学, 大学院・理工学研究科, 卓越教授 (20092562)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 腐食防食 |
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| Research Abstract |
Susceptibility of hydrogen embrittlement of high strength steel in atmospheric corrosion condition is enhanced by zinc coating and its sacrificial protection action. On the other hand, it for aluminum alloy coated steel is substantially suppressed. It was explained that the sacrificial potential for aluminum coated steel ranged around. 0. 7V and hydrogen evolution reaction was inhibited in this potential compared with that for zinc coated was. 1. 0V. Amount of hydrogen absorbed into steel depended upon the microstructure of the steel. It increased with number of wet/dry corrosion cycles when the diffusion constant of hydrogen in the steel was very small, such as martensitic steel.
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