公开(公告)号：US4325791A

公开(公告)日：1982-04-20

申请号：US222865

申请日：1981-01-07

申请人： Forrest B. Waldrop ,  Charles A. Washington

发明人： Forrest B. Waldrop ,  Charles A. Washington

IPC分类号： C25D11/28 ,  C25D11/34

CPC分类号： C25D11/28

摘要： Uranium articles are provided with anodized oxide coatings in an aqueous solution of an electrolyte selected from the group consisting of potassium phosphate, potassium hydroxide, ammonium hydroxide, and a mixture of potassium tetraborate and boric acid. The uranium articles are anodized at a temperature greater than about 75.degree. C. with a current flow of less than about 0.036 A/cm.sup.2 of surface area while the pH of the solution is maintained in a range of about 2 to 11.5. The pH values of the aqueous solution and the low current density utilized during the electrolysis prevent excessive dissolution of the uranium and porosity in the film or watering. The relatively high temperature of the electrolyte bath inhibits hydration and the attendant deleterious pitting so as to enhance corrosion resistance of the anodized coating.

摘要翻译： 铀制品在选自磷酸钾，氢氧化钾，氢氧化铵和四硼酸钾和硼酸钾的混合物的电解质的水溶液中提供阳极化氧化物涂层。 铀制品在大于约75℃的温度下进行阳极氧化，电流小于约0.036A / cm 2的表面积，而溶液的pH值保持在约2至11.5的范围内。 水溶液的pH值和电解过程中使用的低电流密度可防止铀的过度溶解和膜中的孔隙率或浇水。 电解液浴的相对较高的温度抑制水合和伴随的有害点蚀，以增强阳极氧化涂层的耐腐蚀性。

公开(公告)号：US4285782A

公开(公告)日：1981-08-25

申请号：US175813

申请日：1980-08-06

申请人： Forrest B. Waldrop ,  Edward Jones

发明人： Forrest B. Waldrop ,  Edward Jones

IPC分类号： C25D5/10 ,  C25D5/46 ,  C25D5/32

CPC分类号： C25D5/10 ,  C25D5/46

摘要： The present invention is directed to a method for providing uranium metal with a protective coating of copper. Uranium metal is subjected to a conventional cleaning operation wherein oxides and other surface contaminants are removed, followed by etching and pickling operations. The copper coating is provided by first electrodepositing a thin and relatively porous flash layer of copper on the uranium in a copper cyanide bath. The resulting copper-layered article is then heated in an air or inert atmosphere to volatilize and drive off the volatile material underlying the copper flash layer. After the heating step an adherent and essentially non-porous layer of copper is electro-deposited on the flash layer of copper to provide an adherent, multi-layer copper coating which is essentially impervious to corrosion by most gases.

摘要翻译： 本发明涉及一种用于向铀金属提供铜的保护涂层的方法。 对铀金属进行常规清洁操作，其中除去氧化物和其它表面污染物，然后进行蚀刻和酸洗操作。 通过首先在铜氰化物浴中在铀上沉积薄的且相对多孔的铜的闪蒸层来提供铜涂层。 然后将所得的铜层状制品在空气或惰性气氛中加热以挥发并驱除铜闪光层下方的挥发性物质。 在加热步骤之后，将铜的粘附和基本上无孔的层电沉积在铜的闪蒸层上，以提供粘附的多层铜涂层，其基本上不受大多数​​气体腐蚀。