CPC C23C 22/66 (2013.01) [A44B 19/06 (2013.01); C22C 21/08 (2013.01); C23C 22/56 (2013.01); C23C 22/73 (2013.01); A44B 19/36 (2013.01)] | 6 Claims |
1. An aluminum alloy fastening member comprising:
a chemical conversion coating, the chemical conversion coating containing tellurium as a component element,
wherein the chemical conversion coating of the aluminum alloy fastening member presents a gray color that satisfies color tone ranges of −5≤a*≤8; −3≤b*≤10; and 40≤L*≤75, in a CIELAB color space as defined in JIS Z 8781-4 (2013), and
wherein the chemical conversion coating comprises 10% by mass or more of tellurium and/or a tellurium compound.
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