Colored pure titanium or titanium alloy having low...

C - Chemistry – Metallurgy – 22 – C

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C22C 14/00 (2006.01) C23C 28/00 (2006.01) C25D 11/26 (2006.01)

Patent

CA 2610270

This invention provides a colored pure titanium or titanium alloy having low susceptibility to discoloration in an atmospheric environment that, even when titanium is used in a severe acidic rain environment such as roofs and wall materials, has excellent anti-discoloration properties and does not undergo a deterioration in the level of design over a long period of time. The colored pure titanium or titanium alloy having low susceptibility to discoloration in an atmospheric environment is a colored titanium produced by anode oxidation and is characterized in that the average phosphorus content in a range of 40 nm from the surface of a titanium oxide layer formed on the surface of titanium is not more than 5.5 atomic% and the average carbon content in a depth range of 100 nm from the surface of titanium is 3 to 15 atomic%.

Cette invention concerne un titane pur ou alliage de titane coloré ayant une faible tendance à la décoloration dans un environnement atmosphérique lequel, même lorsque le titane est utilisé dans un environnement rude de pluies acides tel que des toits et des matériaux de murs, a d'excellentes propriétés anti-décoloration et ne subit pas de dégradation en ce qui concerne le niveau de design sur une longue durée. Le titane pur ou alliage de titane coloré ayant une faible tendance à la décoloration dans un environnement atmosphérique est un titane coloré produit par oxydation anodique et il est caractérisé en ce que la teneur moyenne en phosphore sur une distance de 40 nm mesurée à partir de la surface de la couche d'oxyde de titane formée sur la surface du titane n'est pas supérieure à 5,5 % atomique et en ce que la teneur moyenne en carbone sur une profondeur de 100 nm mesurée à partir de la surface du titane est de 3 à 15 % atomique.

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