| 摘要 |
A machine for localized cleaning, using pickling acid or a composition/mixture of chemical elements with the effect of pickling acid, applied by mechanical feed instruments (54, 55) to the surface to be treated (5), presenting: the acid kept in a limited quantity in the work position by a cell (1; 11); the volume of this cell (7; 17) is made to match with that of the acid used, i.e. by filling it completely with acid projected on the surface to be treated; the cell having a peripheral edge (6; 23) against the aforementioned surface; the pickling acid activated by an electrode (8; 18) that activates the acid's pickling action. A machine wherein near the cell is provided with an open collecting device for aspirating the returning air (A) and the fumes leaving the cell and the excess of pickling acid (G) that escape laterally from the cell; the open collecting device comprises a hood (12; 19) the bottom edge (20) of which surrounds the edge of the cell (1; 11); a separator (58; 59; 60; 61) is located between the cell and a fan (62) for aspirating the pickling acid and polluting fumes (G); the acid is separated from the air and fumes (F) in the aforementioned separator. |
