Titanium alloy having high corrosion resistance in bromine-ion-containing environment
US-2015240332-A1 · Aug 27, 2015 · US
Titanium alloy
US10227677B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10227677-B2 |
| Application number | US-201214234475-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 20, 2012 |
| Priority date | Jul 26, 2011 |
| Publication date | Mar 12, 2019 |
| Grant date | Mar 12, 2019 |
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Abstract
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A titanium alloy including by mass %, a platinum group metal: 0.01 to 0.15% and a rare earth metal: 0.001 to 0.10%, with the balance being Ti and impurities. The titanium alloy preferably includes as a partial replacement for Ti, Co: 0.05 to 1.00% by mass, and the content of the platinum group metal is preferably in the range of 0.01 to 0.05% by mass. Furthermore, it is preferred that the platinum group metal be Pd and the rare earth metal be Y. Consequently, it is possible to provide a titanium alloy having corrosion resistance comparable to or better than that of the conventional art as well as good workability while offering an economic advantage with a lower content of platinum group metal or an advantage of less likelihood of corrosion growth originating at defects such as flaws that occurred in the surface.
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What is claimed is: 1. A titanium alloy consisting of, by mass %, Pd as a platinum group metal: 0.01 to 0.15% and one or more selected from the group consisting of Y, La, Ce, Pr, and Nd as a rare earth metal: 0.001 to 0.0095%, with the balance being Ti and impurities, wherein, in a multiple crevice test, the titanium alloy does not suffer corrosion attack in any crevice site under a condition of 250 g/L NaCl, pH=2 adjusted with HCL, 150° C., saturated atmosphere, retained 240 hours. 2. A titanium alloy consisting of, by mass %, Pd as a platinum group metal: 0.01 to 0.15% and one or more selected from the group consisting of Y, La, Ce, Pr, and Nd as a rare earth metal: 0.001 to 0.0095%, with the balance being Ti and impurities, wherein Co is included, as a partial replacement for Ti, in an amount of 0.05 to 1.00% by mass, wherein, in a multiple crevice test, the titanium alloy does not suffer corrosion attack in any crevice site under a condition of 250 g/L NaCl, pH=2 adjusted with HCL, 150° C., saturated atmosphere, retained 240 hours. 3. A titanium alloy consisting of, by mass %, Ru as a platinum group metal: 0.01 to 0.15% and one or more selected from the group consisting of La, Ce, Pr and Nd as a rare earth metal: 0.001 to 0.0084%, with the balance being Ti and impurities, wherein, in a multiple crevice test, the titanium alloy does not suffer corrosion attack in any crevice site under a condition of 250 g/L NaCl, pH=2 adjusted with HCl, 150° C., saturated atmosphere, retained 240 hours. 4. A titanium alloy consisting of, by mass %, Ru as a platinum group metal: 0.01 to 0.15% and one or more selected from the group consisting of La, Ce, Pr and Nd as a rare earth metal: 0.001 to 0.0084%, with the balance being Ti and impurities, wherein Co is included, as a partial replacement for Ti, in an amount of 0.05 to 1.00% by mass, wherein, in a multiple crevice test, the titanium alloy does not suffer corrosion attack in any crevice site under a condition of 250 g/L NaCl, pH=2 adjusted with HCl, 150° C., saturated atmosphere, retained 240 hours.
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- What does patent US10227677B2 cover?
- A titanium alloy including by mass %, a platinum group metal: 0.01 to 0.15% and a rare earth metal: 0.001 to 0.10%, with the balance being Ti and impurities. The titanium alloy preferably includes as a partial replacement for Ti, Co: 0.05 to 1.00% by mass, and the content of the platinum group metal is preferably in the range of 0.01 to 0.05% by mass. Furthermore, it is preferred that the plati…
- Who is the assignee on this patent?
- Kaminaka Hideya, Yonemitsu Yoshihisa, Matsumoto Satoshi, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C22C14/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 12 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).