摘要:
Es wird ein Bauteil mit einem Bestandteil (1) aus niedriglegiertem Stahl und/oder Vergütungsstahl bereitgestellt, wobei der Bestandteil (1) zumindest teilweise mit einer Aluminiumdiffusionsschicht (10) beschichtet ist und auf der Aluminiumdiffusionsschicht (10) eine Aluminiumoxidschicht (14) aufgebracht ist, wobei die Schichtdicke der Aluminiumdiffusionsschicht (10) 1 – 200 µm beträgt, wobei die Aluminiumdiffusionsschicht (10) einen Aluminiumanteil aufweist, bezogen auf das Gesamtgewicht der Aluminiumdiffusionsschicht, von 10 Gew.-% über dem Aluminiumanteil des Stahls bis zu einer Maximalkonzentration, wobei der Aluminiumanteil in der Aluminiumdiffusionsschicht (10) in Richtung Grenzfläche (12) zwischen der Aluminiumdiffusionsschicht (10) und der Aluminiumoxidschicht (14) von 10 Gew.-% bis zur Maximalkonzentration zunimmt, und wobei die Maximalkonzentration 11 – 60 Gew.-% beträgt.
摘要:
L'invention concerne un procédé de chromatation d'une pièce comprenant un alliage à base d'aluminium et comprenant les étapes de fourniture de la pièce comportant sur au moins une surface de la pièce une couche à base d'oxyde d'aluminium, d'immersion de la pièce dans un bain de chromatation comprenant du chrome III et de réalisation d'une conversion chimique de la pièce dans le bain de chromatation. L'invention concerne également une pièce obtenue par ce procédé.
摘要:
Methods of depositing a metal selectively onto a metal surface relative to a dielectric surface are described. Methods include reducing a metal oxide surface to a metal surface and protecting a dielectric surface to minimize deposition thereon and exposing the substrate to a metal precursor and an alcohol to deposit a film.
摘要:
The invention refers to a metallic product containing one or several of the metals chromium, aluminium, silicon, and/or titanium in such large amount that said metal or metals form a corrosion protective oxide layer on the metal surface in an oxidising atmosphere and a procedure to manufacture the product. The characteristic of the invention is that the metallic product at least in a layer next to the metal surface contains more than 0,5 weight ppm hydrogen and at the same time more than a total of 0,01 weight % of one or several of the elements that in their elementary form and/or as oxides have the ability to efficiently dissociate oxigen in the boundary between the oxide layer of the product and the surrounding gas phase, here referred to oxygen dissociating elements, ODE, and which belong to the following group of metals, that is rare earth metals, here referred to as REM, i.e. yttrium and elements with the atomic numbers 57-71, and scandium, hafnium, zirconium, niobium, tantalum, titanium, paladium, platinum, and rhodium.
摘要:
The invention refers to a metallic product containing one or several of the metals chromium, aluminium, silicon, and/or titanium in such large amount that said metal or metals form a corrosion protective oxide layer on the metal surface in an oxidising atmosphere and a procedure to manufacture the product. The characteristic of the invention is that the metallic product at least in a layer next to the metal surface contains more than 0,5 weight ppm hydrogen and at the same time more than a total of 0,01 weight % of one or several of the elements that in their elementary form and/or as oxides have the ability to efficiently dissociate oxigen in the boundary between the oxide layer of the product and the surrounding gas phase, here referred to oxygen dissociating elements, ODE, and which belong to the following group of metals, that is rare earth metals, here referred to as REM, i.e. yttrium and elements with the atomic numbers 57-71, and scandium, hafnium, zirconium, niobium, tantalum, titanium, paladium, platinum, and rhodium.
摘要:
A method for creating an oxide coating on the surface of a component formed from austenitic stainless steel or nickel alloy steel is set forth. The component has a naturally formed oxide film at the surface. The naturally formed oxide is enhanced through a process comprising at least two steps. In the first step, the component is heated in the presence of circulating dry air for a first period of time at a temperature of approximately 300 degrees centigrade. In the second step, the component is heated in the presence of static dry air at an elevated pressure for a second period of time at a temperature that is higher than the temperature during the first period. The exterior portion of the enhanced oxide coating is removed with an oxidizing treatment whereby an oxide coating having a high ratio of chromium to iron is exposed at the surface of the stainless steel.