公开(公告)号：US20180237936A1

公开(公告)日：2018-08-23

申请号：US15881305

申请日：2018-01-26

Applicant: Apple Inc.

Inventor： James A. CURRAN ,  Aaron D. PATERSON ,  Brian M. GABLE

IPC: C25D21/00 ,  C25D11/30 ,  C25D11/34

CPC classification number: C25D21/00 ,  C25D11/04 ,  C25D11/08 ,  C25D11/12 ,  C25D11/16 ,  C25D11/243 ,  C25D11/246 ,  C25D11/30 ,  C25D11/34

Abstract: Anodic oxide coatings that provide corrosion resistance to parts having protruding features, such as edges, corners and convex-shaped features, are described. According to some embodiments, the anodic oxide coatings include an inner porous layer and an outer porous layer. The inner layer is adjacent to an underlying metal substrate and is formed under compressive stress anodizing conditions that allow the inner porous layer to be formed generally crack-free. In this way, the inner porous layer acts as a barrier that prevents water or other corrosion-inducing agents from reaching the underlying metal substrate. The outer porous layer can be thicker and harder than the inner porous layer, thereby increasing the overall hardness of the anodic oxide coating.

公开(公告)号：US20190062939A1

公开(公告)日：2019-02-28

申请号：US15686026

申请日：2017-08-24

Applicant: Apple Inc.

Inventor： James A. CURRAN ,  Aaron D. PATERSON ,  William D. BURKE

IPC: C25D11/24 ,  H05K5/00 ,  H05K5/04

CPC classification number: C25D11/246 ,  B44C1/228 ,  C23C22/58 ,  C25D11/18 ,  C25D11/22 ,  C25D11/243 ,  G06F1/16 ,  H05K5/0086 ,  H05K5/04

Abstract: Treatments for anodic coatings that provide improved resistance to staining and cracking during various manufacturing processes are described. According to some embodiments, the methods include placing the anodic coatings in partially sealed states by sealing only the outermost portions of the anodic coatings, which protect the outer surfaces of the anodic coatings from contamination and staining. Inner portions of the anodic coatings are left unsealed, thereby making the anodic coatings more compliant and resistant to cracking when exposed to manufacturing processes, even those that involve exposure to high temperatures or high mechanical stress. Subsequent to the processing, another sealing process can be implemented to fully seal the anodic coatings so that they provide good corrosion and wear resistance.