Process of cleaning an austenitic steel surface
AssigneeVereinigte Oesterreichische Eisen-und Sthl-Werke Alpine Montan Akteingesellschaft
InventorsFelix Wallner, Walter Lugscheider
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Abstract
An austenitic steel surface is cleaned of ferritic contaminations and other impurities by blasting it with a wet abrasive mixture containing 40-90% by volume, of corundum having an average grain size of 0.2 to 0.6 mm and of triangular faces. This wet abrasive mixture is accelerated and applied to the surface under a gas pressure of 2.5 to 5.5 atmospheres, 0.8 to 3 kg of corundum being applied per 100 cm.sup.2 of the surface to be cleaned. Before the surface has dried, a rinsing liquid is applied thereto.
Claims6
A process of cleaning a surface of austenitic steel, which comprises the steps of
- (a) blasting the surface with an abrasive mixture consisting, by volume, of 40% to 90% of corundum and 60% to 10% of a liquid, the corundum having an average grain size of 0.2 to 0.6 mm and corundum grains having triangular faces,
- (1) the abrasive blasting mixture being accelerated and applied to the austenitic steel surface by a compressed gas under a pressure in the range of 2.5 to 5.5 atmospheres, the gas pressure increasing in direct proportion to the liquid content in the mixture, and
- (2) 0.8 to 3 kg of corundum being applied per 100 cm.sup.2 of the austenitic steel surface to be cleaned, and
- (b) applying a rinsing liquid to the blasted surface before the surface has dried.
Dependencies are inferred from the claim text.