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G MATHEWS
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G MATHEWS
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Priority to ES353799ApriorityCriticalpatent/ES353799A1/en
Publication of ES353799A1publicationCriticalpatent/ES353799A1/en
Cleaning And De-Greasing Of Metallic Materials By Chemical Methods
(AREA)
Abstract
A method for treating a metal substrate, characterized by immersing the substrate in a diluted chromic acid aqueous cleaning bath, containing not more than about 2% by weight of sulfuric acid, and also containing at least one piece of metallic copper solid immersed therein, and connecting said substrate to the positive terminal of a direct current source, whose negative terminal is also connected, in electrically conductive relationship, to said solid metallic copper. (Machine-translation by Google Translate, not legally binding)
ES353799A1968-05-111968-05-11A procedure to treat a metal substrate. (Machine-translation by Google Translate, not legally binding)
ExpiredES353799A1
(en)
Procedure and apparatus for depositing electrolytically a superficial layer on metal articles (Machine-translation by Google Translate, not legally binding)
New procedure for obtaining a metal coating applicable to fossils, plants and other objects of animal origin (Machine-translation by Google Translate, not legally binding)