MX9706368A - Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same. - Google Patents
Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same.Info
- Publication number
- MX9706368A MX9706368A MX9706368A MX9706368A MX9706368A MX 9706368 A MX9706368 A MX 9706368A MX 9706368 A MX9706368 A MX 9706368A MX 9706368 A MX9706368 A MX 9706368A MX 9706368 A MX9706368 A MX 9706368A
- Authority
- MX
- Mexico
- Prior art keywords
- solution
- degree
- lead
- components
- components made
- Prior art date
Links
- 238000009428 plumbing Methods 0.000 title abstract 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title abstract 2
- 239000000956 alloy Substances 0.000 title abstract 2
- 229910045601 alloy Inorganic materials 0.000 title abstract 2
- 229910052802 copper Inorganic materials 0.000 title abstract 2
- 239000010949 copper Substances 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 239000000243 solution Substances 0.000 abstract 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- 239000007864 aqueous solution Substances 0.000 abstract 2
- 238000012360 testing method Methods 0.000 abstract 2
- 229910001369 Brass Inorganic materials 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 235000012206 bottled water Nutrition 0.000 abstract 1
- 239000010951 brass Substances 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000003651 drinking water Substances 0.000 abstract 1
- 238000005530 etching Methods 0.000 abstract 1
- 238000007654 immersion Methods 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- ing And Chemical Polishing (AREA)
Abstract
Lead brass components for potable water distribution circuits (e.g., plumbing components made of CuZn39Pb3, containing 3 % Pb), also chronium plated ones, are subjected to a lead-selective surface etching to reduce, in operation, the release of Pb caused by Pb surface "smearing", resulting either from machining or molding; said elements are firstly contacted by an aqueous solution of an acid capable of forming soluble Pb salts, preferably a non-oxidizing solution, by simply dipping the components in the solution, e.g., a solution of 0.1 M sulfamic acid, at 20 degree -50 degree C for 10 to 50 minutes, and, subsequently, the elements are passivated by immersion into a strong base aqueous solution, e.g., a solution of 0.1 M NaOH at 20 degree -25 degree C, for approximately 10 minutes; in this manner, plumbing components made of a copper based alloy containing Pb are obtained, which components, after 15 days of test according to US NSF STD61 procedure, release Pb in an amount less than 0.025 'mu'g for each ml of the internal volume of the component delimited by metallic walls remained in contact with water during the testing period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MX9706368A MX9706368A (en) | 1997-08-21 | 1997-08-21 | Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MX9706368A MX9706368A (en) | 1997-08-21 | 1997-08-21 | Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX9706368A true MX9706368A (en) | 1998-08-30 |
Family
ID=39539682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX9706368A MX9706368A (en) | 1997-08-21 | 1997-08-21 | Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same. |
Country Status (1)
| Country | Link |
|---|---|
| MX (1) | MX9706368A (en) |
-
1997
- 1997-08-21 MX MX9706368A patent/MX9706368A/en not_active IP Right Cessation
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Grant or registration | ||
| MM | Annulment or lapse due to non-payment of fees |