公开(公告)号：US20170051426A1

公开(公告)日：2017-02-23

申请号：US14830699

申请日：2015-08-19

Applicant: Apple Inc.

Inventor： James A. Curran ,  William A. Counts ,  Brian M. Gable

IPC: C25D11/04 ,  C22C21/10 ,  C25D9/06

CPC classification number: C25D11/04 ,  C22C21/10 ,  C25D9/06

Abstract: Methods of forming anodic oxide coatings on certain high strength aluminum alloys are described. Methods involve preventing or reducing the formation of interface-weakening species, such as zinc-sulfur compounds, at an interface between an anodic oxide coating and underlying aluminum alloy substrate during anodizing. In some embodiments, a micro-alloying element is added in very small amounts to an aluminum alloy substrate to prevent enrichment of zinc at the anodic oxide and substrate interface, thereby reducing or preventing formation of the zinc-sulfur interface-weakening species. In some embodiments, a sulfur-scavenging species is added to an aluminum alloy substrate to prevent sulfur from a sulfuric acid anodizing bath from binding with zinc and forming the zinc-sulfur interface-weakening species at the anodic oxide and substrate interface. In some embodiments, a micro-alloying element and a sulfur-scavenging species are added to an aluminum alloy substrate. Resultant anodic oxide coatings have minimal or no discoloration.

Abstract translation: 描述了在某些高强度铝合金上形成阳极氧化物涂层的方法。 方法包括在阳极氧化期间在阳极氧化物涂层和下面的铝合金基底之间的界面处防止或减少界面弱化物质如锌 - 硫化合物的形成。 在一些实施方案中，微合金元素以非常少的量添加到铝合金基底以防止锌在阳极氧化物和基底界面处的富集，从而减少或防止锌 - 硫界面弱化物质的形成。 在一些实施方案中，将硫清除物质加入到铝合金基底中以防止硫酸阳极氧化浴中的硫与锌结合并在阳极氧化物和基底界面处形成锌 - 硫界面弱化物质。 在一些实施方案中，将微合金元素和除硫物质加入到铝合金基底中。 所得的阳极氧化物涂层具有最小或无变色。

公开(公告)号：US09359686B1

公开(公告)日：2016-06-07

申请号：US14593845

申请日：2015-01-09

Applicant: Apple Inc.

Inventor： James A. Curran ,  William A. Counts ,  Eric W. Hamann

IPC: C25D11/04 ,  C25D11/18

CPC classification number: C25D11/08 ,  C22C21/00 ,  C22C21/08 ,  C22C21/10 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18 ,  C22F1/047 ,  C22F1/053 ,  C22F1/057 ,  C25D11/04 ,  C25D11/18 ,  C25D11/24 ,  C25D11/243 ,  C25D11/246

Abstract: Anodic oxide coatings and methods for forming anodic oxide coatings on metal alloy substrates are disclosed. Methods involve post-anodizing processes that improve the appearance of the anodic oxide coating or increase the strength of the underlying metal alloy substrates. In some embodiments, a diffusion promoting process is used to promote diffusion of one or more types of alloying elements enriched at an interface between the anodic oxide coating and the metal alloy substrate away from the interface. The diffusion promoting process can increase an adhesion strength of the anodic oxide film to the metal alloy substrate and reduce an amount of discoloration due to the enriched alloying elements. In some embodiments, a post-anodizing age hardening process is used to increase the strength of the metal alloy substrate and to improve cosmetics of the anodic oxide coatings.

Abstract translation: 公开了阳极氧化物涂层和在金属合金基底上形成阳极氧化物涂层的方法。 方法包括后阳极氧化方法，其改善阳极氧化物涂层的外观或增加下面的金属合金基材的强度。 在一些实施方案中，扩散促进方法用于促进富集在阳极氧化物涂层和金属合金基底之间的界面处远离界面的一种或多种类型的合金元素的扩散。 扩散促进过程可以增加阳极氧化膜对金属合金基底的粘合强度，并减少由于富集的合金元素引起的变色量。 在一些实施例中，使用后阳极氧化时代硬化工艺来增加金属合金基底的强度并改善阳极氧化物涂层的化妆品。