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The Bright Colors of Anodized Aluminum Are Due to

Question 35

Multiple Choice

The bright colors of anodized aluminum are due to


A) electrodeposition of organic dyes on the aluminum surface.
B) the formation of an aluminum alloy with chromium and copper.
C) iridescence involving the semitransparent outer layer of Al2O3.
D) trapping of organic dye molecules in a spongy Al2O3 matrix.

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