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公开(公告)号：US3616308A
公开(公告)日：1971-10-26
申请号：US3616308D
申请日：1968-11-06
申请人： ALCAN RES & DEV
CPC分类号： C25D11/22
摘要： In procedure for producing colored coatings on aluminum by first anodizing the aluminum surface and then treating such anodically coated surface with alternating current in an acidic bath containing metal ions selected from the group consisting of the following cations and anions: Cu , Ag , Pb , and anions consisting of oxygen combined with one of the metals Se, Te and Mn, to produce a colored deposit in the coating, improved coloring results notably in avoiding or inhibiting occurrence of localized nonuniformity, especially with darker or more intense tones, are achieved by maintaining a content of aluminum ions in the bath.
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公开(公告)号：US3616297A
公开(公告)日：1971-10-26
申请号：US3616297D
申请日：1968-09-23
申请人： ALCAN RES & DEV
CPC分类号： C25D11/22
摘要： In procedure for producing colored coatings on aluminum by first anodizing the aluminum surface and then treating such anodically coated surface with alternating current in an acidic bath containing Ni or Co ions to produce a colored deposit in the coating, simplified control with effective coloring results is achieved by providing a content of combined aluminum in the acidic bath while maintaining the bath at a pH, notably about 5 to about 6, which restricts the dissolved A1 ion concentration to a low value.
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公开(公告)号：US3622471A
公开(公告)日：1971-11-23
申请号：US3622471D
申请日：1968-07-02
申请人： ALCAN RES & DEV
CPC分类号： C25D11/22 , C25D11/005 , Y10S204/07
摘要： In procedure and apparatus where inorganically colored coatings on aluminum are produced by first anodizing the aluminum articles and then treating such anodically coated aluminum with alternating current in an acidic bath containing metal ions for producing a colored deposit in the coating, the alternating current treatment is effected between an anodized aluminum workload and a plurality of electrode elements constituting a counterelectrode, which are distributed along a region that faces the workload, e.g. elements of the same metal as the ions in the bath, the distribution and spacing of the elements being of a described nature such as to improve the desired results and to facilitate control. With substantially uniform alternating current density over the anodized aluminum in the above manner, control of operation is further facilitated by maintaining a selected current value condition or conditions for corresponding current density control, preferably such that the color obtained is determinable in accordance with duration of the treatment.
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公开(公告)号：US3616309A
公开(公告)日：1971-10-26
申请号：US3616309D
申请日：1968-11-06
申请人： ALCAN RES & DEV
CPC分类号： C25D11/22
摘要： In procedure for producing colored coatings on aluminum by first anodizing the aluminum surface and then treating such anodically coated surface with alternating current in an acidic bath containing metal ions selected from the group consisting of the following cations and anions: NI , Co , Cu , Ag , Pb , and anions consisting of oxygen combined with one of the metals Se, Te and Mn, to produce a colored deposit in the coating, improved coloring results notably in avoiding or inhibiting occurrence of localized nonunifomity, especially with darker or more intense tones, are achieved by maintaining a content of magnesium ions in the bath.
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