Titanium product with improved corrosion resistant property

A technology of corrosion resistance and products, which is applied in the field of titanium products, can solve the problem of expensive addition of platinum group metals in precious metal alloys, and achieve the effect of low cost

Inactive Publication Date: 2004-05-19
TITANIUM METALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above-mentioned prior art methods are effective in enhancing the corrosion resistance of titanium under severe corrosion conditions, the addition of noble metal alloys, especially platinum group metals, is extremely expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] In the experimental work leading up to the present invention, general corrosion tests were performed using different surface area ratios and excellent results were obtained. Although the separation is very clear, polarization (change in corrosion potential) can still be observed. As shown in Tables 1 and 2, the method of the present invention is more effective than titanium grade 16 or titanium grade 26 in boiling hydrochloric acid solutions at substrate to attachment element surface area ratios as high as 1000.

[0011]

[0012] Remarks: 1 - PGM is applied to the surface using electroplating.

[0013] 2- PGM as a thin plate, attached to the surface by resistance welding.

[0014]

[0015] Also slows down the rate of corrosion in oxidizing acids. This has been demonstrated for concentrated nitric acid in Table 3. In this case, in fact, titanium with Pt attachment elements exhibited a corrosion rate better than that of grade 7 titanium.

[0...

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Abstract

A titanium article having improved corrosion resistance resulting from an applique of a platinum group metal or alloy thereof attached to a minor surface portion of the article.

Description

technical field [0001] The present invention relates to a titanium article in which improved corrosion resistance is obtained by using an attachment element of a platinum group metal or an alloy thereof directly attached to a partial surface of the titanium article. Background technique [0002] As an active metal, titanium's corrosion resistance depends on the morphology and stability of the oxide film on the surface. Under stable conditions, titanium can exhibit remarkable corrosion resistance properties. However, on the contrary, once the stability of its oxide film is destroyed, it will have a very high corrosion rate. Such unstable conditions are usually referred to as being at the extremes of the pH scale. Strong acid or strong alkali solution can destroy the stability of titanium oxide film. [0003] Generally, according to the practice of the prior art, when using titanium, if the stability of its oxide film cannot be determined under the conditions of use, alloyi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/16B32BB32B15/00B32B15/01C22C5/04C22C14/00C23CC23C16/14C23C26/00C23C26/02C23C28/00C23C30/00C23F13/00C23F13/02C23F13/04
CPCY10S428/938Y10S428/934Y10S428/935C22C14/00C23C30/00C23C26/02C23C26/00B32B15/018Y10T428/12806Y10T428/12875B32B15/01
Inventor 詹姆士·S·格劳曼詹姆士·G·米勒罗伊·E·亚当斯
Owner TITANIUM METALS CORP
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