Nondestructive Observation and Evaluation of Surface Local Defects by Photoacoustic Imaging
| Project/Area Number |
11650099
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | TOHOKU GAKUIN UNIVERSITY |
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Principal Investigator |
HIWATASHI Yoichiro Faculty of Engineering, TOHOKU GAKUIN UNIVERSITY, 工学部, 助教授 (30048813)
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| Co-Investigator(Kenkyū-buntansha) |
HOSHIMIYA Tsutomu Faculty of Engineering, TOHOKU GAKUIN UNIVERSITY, 工学部, 教授 (40118336)
ENDOH Haruo Faculty of Engineering, TOHOKU GAKUIN UNIVERSITY, 工学部, 助教授 (20137582)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1999: ¥2,800,000 (Direct Cost: ¥2,800,000)
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| Keywords | Pitting Corrosions / Photoacoustic Microscopy (PAM) / Photoacoustic Imaging / Imersion Test / NDE / Electrochemical Method / 電気化学的測定 / 光音響顕微鏡 |
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| Research Abstract |
In this study, imaging of the real pitting corrosions occurred in salt - alcohol aqueous solution by photoacoustic microscope (PAM) has been demonstrated.
Two types of the real pitting corrosions were generated by immersion tests and electrochemical methods. Immersion tests were conducted in sodium chloride and magnesium chloride alcohol aqueous solutions for pure aluminum plate.
Nondestructive measurement of pitting corrosions was carried out with PAM and simultaneous measurement of amplitude and phase of the photoacoustic (PA) signal at every point of scanning was carried out and the PA amplitude and phase images are obtained. The PA amplitude signal intensity varied with both shape and depth of a pitting corrosions. Phase signal intensity relatively reflected the depth and cross section of a pitting corrosion.
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Report
(3 results)
Research Products
(16 results)
