Pesquisa nas coleções internacionais e nacionais de patentes

1. (WO2007017156) ELECTROPOLISHING METHOD

Pub. No.:    WO/2007/017156    International Application No.:    PCT/EP2006/007583
Publication Date: Fri Feb 16 00:59:59 CET 2007 International Filing Date: Tue Aug 01 01:59:59 CEST 2006
IPC: C25F 3/24
C25F 7/02
Applicants: POLIGRAT GMBH
PIESSLINGER-SCHWEIGER, Siegfried
BÖHME, Olaf
Inventors: PIESSLINGER-SCHWEIGER, Siegfried
BÖHME, Olaf
Title: ELECTROPOLISHING METHOD
Abstract:
The invention relates to an inexpensive and environmentally friendly method for electrochemically polishing steel, especially low-alloy steels. The method is characterized in that the workpieces, after electropolishing, are rinsed in a phosphoric acid/sulfuric acid bath containing little water in a first rinsing step, thereby preventing the freshly polished surfaces from chemical attacks without using inhibitors such as chromata which are environmentally harmful and injurious to health. Recirculation of the acids and rinse solutions allows to recover them, thereby creating a waste water-free process.