| 发明名称 |
MEJORAS EN LOS PROCEDIMIENTOS PARA EL DECAPADO DE ACEROS REFINADOS, DE COBRE, DE ALEACIONES DE METALES NO FERRICOS, DE TITANIO, DE CIRCONIO, DE TANTALO Y OTROS, POR MEDIO DE BANOS DE DECAPADO NITRICOS |
| 摘要 |
<p>Pickling process for alloy steels, copper, non-ferrous heavy metal alloys, special alloys, titanium, zirconium, tantalum, etc. employs a nitric acid bath, opt. contg. other acids (e.g. hydrofluoric acid), to which urea or an aq. urea soln. is added, the urea supply being metered directly by a NOx detector, operating continuously in the exhaust gas conduit, and a regulator (e.g. as P.I (0/0)</p> |
