Test medium for detecting phosphorus segregates in metallic mate

Details Test medium for detecting phosphorus segregates in metallic mate Test medium for detecting phosphorus segregates in metallic mate

1985-10-10

1987-09-29

Lacey, David L.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 68, G01N 3122

Patent

active

046967958

ABSTRACT:
A sheet impregnated with an aqueous solution of silver nitrate is effective to detect phosphorus 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 test paper, maintaining the test paper in contact with the steel surface for a sufficient time, removing the test paper from the steel surface, and subjecting the test paper to fixing treatment.

REFERENCES:
patent: 2676874 (1954-04-01), Devine
patent: 4211532 (1980-07-01), Tobari et al.
patent: 4420567 (1983-12-01), McMahon et al.
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.
T. S. Harison, The Determination of Phosphorus in Haematite and Steel by the Molybdenum Blue Method, J.S.C.I., 68, Mar. 1949, pp. 84-88.

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