Claims
- 1. A test medium for use in detecting phosphorus segregates in a metallic material, comprising a wet sheet of paper impregnated with an aqueous solution containing 0.00005 to 0.2 mol/l of copper ion and 0.0001 to 1.0 mol/l of nitrate ion.
- 2. A test medium for use in detecting phosphorus segregates in a metallic material, comprising a sheet of paper having an effective amount of cooper ion supplying compound and nitrate ion supplying compound incorporated therein in a dry state, said amount being effective to preferentially etch a metallic material so as to detect phosphorus segregates when the sheet is saturated with water and applied to a surface of a metallic material.
- 3. A test medium for use in detecting phosphorus segregates in a metallic material, comprising a wet sheet of paper impregnated with an aqueous solution containing 0.00005 to 0.2 mol/l of copper ion and 0.0001 to 1.0 mol/l of nitrate ion and having a pH of at least 6.
- 4. A test medium for use in detecting phosphorus segregates in a metallic material, comprising a sheet of paper having an effective amount of copper ion supplying compound and nitrate ion supplying compound incorporated therein in a dry state such that there will be formed an aqueous solution containing 0.00005 to 0.2 mol/l of copper ion and 0.0001 to 1.0 mol/l of nitrate ion and having a pH of at least 6 when the sheet is saturated with water, said amount being effective to preferentially etch a metallic material so as to detect phosphorus segregates when the sheet saturated with water is applied to a surface of a metallic material.
Priority Claims (2)
Number |
Date |
Country |
Kind |
59-170227 |
Aug 1984 |
JPX |
|
59-174828 |
Aug 1984 |
JPX |
|
Parent Case Info
This application is a division of application Ser. No. 765,245, filed 8/13/85 now U.S. Pat. No. 4,681,857.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3758351 |
Striedieck et al. |
Sep 1973 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
765245 |
Aug 1985 |
|