[article]
| Titre : |
Self-healing metal oxides could protect against corrosion |
| Type de document : |
texte imprimé |
| Auteurs : |
David Chandler, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 27-29 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Alumine
Anticorrosifs
Anticorrosion
Métaux -- Revêtements protecteurs
Revêtement autoréparant
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Researchers at MIT have found that an ultra-thin layer of aluminium oxide, though solid, can flow like a liquid instead of cracking.
A solid oxide protective coating for metals can, when applied in sufficiently thin layers, deform as if it were a liquid, filling any cracks and gaps as they form.
The thin coating layer should be especially useful to prevent leakage of tiny molecules that can penetrate through most materials, such as hydrogen gas that could be used to power fuel-cell cars, or the radioactive tritium (a heavy form of hydrogen) that forms inside the cores of nuclear power plants.
Most metals, with the notable exception of gold, tend to oxidise when exposed to air and water. This reaction, which produces rust on iron, tarnish on silver and verdigris on copper or brass, can weaken the metal over time and lead to cracks or structural failure. But there are three known elements that produce an oxide that can actually serve as a protective barrier to prevent any further oxidation: aluminium oxide, chromium oxide and silicon dioxide. |
| Note de contenu : |
- Environmental transmission electron microscope used
- Aluminium oxide studied
- Figure : Reserachers have found that a solid oxide protective coating for metals can, when applied in sufficiently thin layers, deform as if it were a liquid, filling any cracks and gaps as they form |
| En ligne : |
https://drive.google.com/file/d/1qGlYQnAOuZ6JqYLqtc61QLLLVQm9HIKR/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30621 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 208, N° 4641 (05/2018) . - p. 27-29
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Self-healing metal oxides could protect against corrosion in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4641 (05/2018)
