Aluminium alloy corrosion detection by magnetic measurements
| Autor: | J. J Rameau, F Alcouffe, C Andrieu, F. Dalard, M. Reboul |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Materials science
Magnetometer Mechanical Engineering Inorganic chemistry Analytical chemistry chemistry.chemical_element Magnetic field law.invention Corrosion SQUID chemistry Mechanics of Materials law Aluminium visual_art Galvanic cell Pitting corrosion Aluminium alloy visual_art.visual_art_medium General Materials Science |
| Zdroj: | Journal of Materials Science. 33:3177-3181 |
| ISSN: | 0022-2461 |
| DOI: | 10.1023/a:1004308225708 |
| Popis: | During corrosion, currents passing from anodes to cathodes generate magnetic fields. Pitting corrosion of aluminium alloys in aggressive media was detected through magnetic field measurements, without electrical connection to the sample and without reference or auxillary electrodes in the corrosion cell. A sodium chloride solution containing hydrogen peroxide or a solution of potassium hydroxide 2 mol l-1 solution was used for corrosion tests. Two magnetometers developed by LETI were used: a superconducting quantum interference device (SQUID) magnetometer and a nuclear magnetic resonance (NMR) magnetometer. The SQUID provided information on spatial distribution and direction of the currents. The NMR magnetometer was better for studying the development of the corrosion over time. © 1998 Kluwer Academic Publishers |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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