Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
An Effective Anti-Discoloration Coating for Copper
An-Chou YehChin-Chuan HuangChih-Chen Hsiao
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2011 Volume 52 Issue 2 Pages 268-270


This article investigated the effectiveness of a newly developed anti-discoloration method for copper (C1100). The procedure involved diffusion of aluminum into the copper substrate and the subsequent formation of Cu-Al oxide spinels on the surface by a heat treatment. Samples of C1100 with and without surface treatment were subjected to ageing at 250°C for various length of time up to 40 min in order to promote surface discoloration due to oxidation. In addition, a commercially available anti-discoloration coating (C-107) was applied on testpieces for comparative studies. Tested samples were subjected to spectral colorimeter studies in order to determine the degree of discoloration occurred on the surface; microstructures and phase identifications were examined by SEM and XRD. In conclusions, the newly developed method exhibited potential to protect the surface of C1100, and its performance surpassed that of C-107.

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© 2011 The Japan Institute of Metals and Materials
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