METHOD FOR CHEMICAL POLISHING OF ALUMINIUM Russian patent published in 1998 - IPC

Abstract RU 2101386 C1

FIELD: metallurgy; machine building. SUBSTANCE: method of polishing aluminium and its alloys involves treatment of metal surface in special solution which takes place at 95-110 C within 1-5 min. The process is carried out in two steps at interval 0.5-1 min. Special solution comprises, g/l: polyphosphoric acid (having density 1.95 kg/dm³), 670-720; sulfuric acid (having density 1.8 kg/dm³), 210-330; nitric acid (having density 1.4 kg/dm³), 88-220; pentahydrous copper sulfate, 3.6-7.3 and orthophosphoric acid (having density 1.57 kg/dm³), 660-680. EFFECT: improved purity of treated surface.

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RU 2 101 386 C1

Authors

Mjakisheva E.A.

Chumaevskij V.A.

Dates

1998-01-10—Published

1995-12-09—Filed