Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1977-12-16
1979-01-02
Caroff, Marc L.
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
134 41, 252141, 252142, 252146, B08B 308
Patent
active
041325680
ABSTRACT:
Metal surfaces are conditioned by subjecting the metal to the action of an acid pickling bath containing a pickling acid which reacts with the metal to condition the surface thereof. This reaction also produces hydrogen gas which forms a film on the surface of the metal which film inhibits the rate of reaction between the pickling acid and the metal. A compound capable of liberating elemental colloidal sulfur which reacts with the hydrogen gas to form hydrogen sulfide and thereby decrease the amount of the hydrogen film present to thereby increase the effectiveness of the pickling acid is added to the acid pickling bath. An effective amount of sodium sulfite is also added to the acid pickling bath to cause sodium thiosulfate to be produced in situ whereby the colloidal sulfur is maintained at a fine particulate size to thereby increase the effectiveness of the colloidal sulfur and consequently more effectively remove the hydrogen film from the surface of the metal to thereby further increase the effectiveness of the pickling acid.
REFERENCES:
patent: 1321182 (1919-11-01), Allen
patent: 2121520 (1938-06-01), Curtin
patent: 2249383 (1941-07-01), Hilty
patent: 2302643 (1942-11-01), Thompson
patent: 2313925 (1943-03-01), Curtin
patent: 2360509 (1944-10-01), Morgan et al.
patent: 2636009 (1953-04-01), Irwin
patent: 2692187 (1954-10-01), Chester et al.
patent: 2692188 (1954-10-01), Chester et al.
patent: 2759862 (1956-08-01), Henricks
patent: 2813816 (1957-11-01), Otto
patent: 2831814 (1958-04-01), Chester et al.
patent: 3226180 (1965-12-01), Irwin
Eaton, Photographic Chemistry, 1965, pp. 75-84.
Caroff Marc L.
Hussey Robert R.
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