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Copper and zinc elution preventing method of copper-alloy-made plumbing instrument including valve and pipe joint, copper-alloy-made plumbing instrument using the method, and film-forming agent
US8936048B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8936048-B2 |
| Application number | US-201113241784-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 23, 2011 |
| Priority date | Nov 22, 2010 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
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Abstract
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A method is provided for preventing copper and zinc from being eluted from a copper-alloy-made plumbing instrument that includes valves and pipe joints and suppresses copper and zinc from being eluted from the copper-alloy-made plumbing instrument while using for the plumbing instrument copper alloy as-is that includes bronze and brass, to provide a copper-alloy-made plumbing instrument using the method and to provide a film-forming agent. The method forms on at least a liquid-contact portion of the copper-alloy-made plumbing instrument a film of an organic substance comprising unsaturated fatty acid and coating with the film both copper and zinc in the surface layer of the liquid-contact portion of the plumbing instrument, thereby suppressing the elution of copper and zinc.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for preventing copper and zinc from being eluted from a copper alloy plumbing instrument that includes valves and pipe joints, comprising: providing copper and zinc in a surface layer of a liquid-contact portion of a copper alloy plumbing instrument; and coating an organic substance comprising unsaturated fatty acid to form a film on at least the liquid-contact portion of the copper alloy plumbing instrument. 2. The method ac…
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- What does patent US8936048B2 cover?
- A method is provided for preventing copper and zinc from being eluted from a copper-alloy-made plumbing instrument that includes valves and pipe joints and suppresses copper and zinc from being eluted from the copper-alloy-made plumbing instrument while using for the plumbing instrument copper alloy as-is that includes bronze and brass, to provide a copper-alloy-made plumbing instrument using t…
- Who is the assignee on this patent?
- Sugaya Norikazu, Kitz Corp
- What technology area does this patent fall under?
- Primary CPC classification C23C28/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 20 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).