Chemistry: analytical and immunological testing – Metal or metal containing – Presence of a component of steel
Patent
1985-10-10
1987-09-29
Lacey, David L.
Chemistry: analytical and immunological testing
Metal or metal containing
Presence of a component of steel
436103, 436125, G01N 3320
Patent
active
046969063
ABSTRACT:
An aqueous solution of 0.1-80% silver nitrate is effective to detect phosphrous segregates in a metallic material, particularly cast steel. Segregated phosphorus can be detected by etching a surface of steel to be tested, attaching test paper onto the steel surface, applying an aqueous solution of 0.1 to 80% by weight of silver nitrate to the paper, maintaining the paper in contact with the steel surface for a sufficient time, removing the paper from the steel surface, and subjecting the paper to fixing treatment. The solution may further comprise an amount of lower alkyl alcohol that is compatible with the silver nitrate in solution.
REFERENCES:
patent: 2676874 (1954-04-01), Devine
patent: 4211532 (1980-07-01), Tobari et al.
patent: 4420567 (1983-12-01), McMahon et al.
T. S. Harison, The Determination of Phosphorus in Haematite and Steel by the Molybdneum Blue Method, J. C. CI, 68, Mar. 1949, pp. 84-88.
J. Berry et al, Observations on the Use of Potassium Chromate as Indicator for the Titration of Chlorides with Silver Nitrate, The Analyst, vol. 64 (1939) pp. 730-734.
Funahashi Yoshiko
Harimaya Senichi
Kamino Yoshikazu
Matsumura Yasuharu
Kawasaki Steel Corporation
Lacey David L.
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