C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 8/14 (2006.01)
Patent
CA 2109366
A protective passive oxide layer is formed on the inner surfaces of metal heat pipes or tubes including their end caps, welds and accompanying hardware through the use of an oxygen encapsulation method. After cleaning the tube and its accompanying parts, the tube is reassembled and existing gases within the tube are removed thereby creating a vacuum inside the tube. The tube is then filled with pure oxygen and sealed. After the oxygen is sealed within the tube, the sealed tube is heated thereby forming a passive oxide layer, such as magnetite (Fe3O4) on the inner surface of the tube.
Une couche d'oxyde de passivation protectrice est formée sur les surfaces internes des caloducs ou tubes thermiques métalliques comprenant les obturateurs d'extrémité, les soudures et les pièces d'accompagnement de ces derniers, grâce à l'utilisation d'une méthode d'encapsulation de l'oxygène. Après nettoyage du tube et des pièces d'accompagnement, on réassemble le tube, on retire les gaz existants à l'intérieur du tube, ce qui crée un vide. Le tube est ensuite rempli d'oxygène pur et fermé hermétiquement. Une fois l'oxygène enfermé hermétiquement dans le tube, on chauffe le tube fermé, ce qui permet de former une couche d'oxyde de passivation, comme de la magnétite (Fe3O4) sur la surface interne du tube.
Carpenter Neil N.
Martin Donald T.
Paul Larry D.
Babcock & Wilcox Company The
Ridout & Maybee Llp
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