METHOD FOR CLEANING METAL SURFACE Russian patent published in 1998 - IPC

Abstract RU 2109087 C1

FIELD: liquid chemical cleaning of surface of metal articles; may be used in various industries. SUBSTANCE: surfaces to be cleaned are treated with solution of sulfuric acid with concentration of 14-18 M subjected to electrochemical activation with their subsequent washing and drying. Solution of sulfuric acid is activated in electrochemical cell separated into cathode and anode chambers with voltage across electrodes amounting to 4.5-6 V. Activation of solution in anode chamber is carried out simultaneously with its purification in cathode chamber. Time taken for articles treatment is 0.5-10 min at temperature from 10 to 0 C. EFFECT: higher efficiency. 4 cl, 5 dwg, 1 tbl

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RU 2 109 087 C1

Authors

Khakhanina T.I.

Kljueva T.B.

Selivanova I.N.

Savel'Ev V.A.

Krasnikov G.Ja.

Dates

1998-04-20—Published

1997-01-21—Filed