公开(公告)号：US3852172A

公开(公告)日：1974-12-03

申请号：US26079672

申请日：1972-06-08

申请人： OLIVETTI & CO SPA

发明人： GUGLIEMI N ,  VITTONE S ,  ROLANDO G

IPC分类号： C23C22/70 ,  C25D11/34 ,  C23B9/00 ,  C23B5/00

CPC分类号： C23C22/70 ,  C25D11/34

摘要： The surface oxidation process of the zinc or of a zinc coating consists of immersion of the zinc in an electrolytic cell, where a direct current of selected magnitude is driven and where the electrolytic bath consists essentially of a solution in an alkali metal nitrate melted mixture either of an hexavalent oxide of the type XO3 or of a salt of the type Y2XO4 or of a salt of the type Y2Cr2O7, where X represents an element selected in the group of chromium molybdenum and tungstenum and Y an element selected between sodium and potassium. When solution of hexavalent chrome CrH3 in a mixture of melted alkali metal nitrates is used as bath, the oxidizing process can be carried out without current in the cell, by mere immersion of the zinc.

摘要翻译： 锌或锌涂层的表面氧化过程包括将锌浸入电解池中，其中驱动所选量级的直流电，并且其中电解浴基本上由碱金属硝酸盐熔融混合物中的溶液组成， 的XO 3型或Y2XO4型盐或Y2Cr2O7型盐的六价氧化物，其中X表示选自铬钼和钨的组元素，Y表示选自钠和钾之间的元素。 当将熔融的碱金属硝酸盐的混合物中的六价铬CrH 3溶液用作浴时，可以通过仅浸渍锌而在电池中无电流进行氧化处理。