Aluminum alloy fastening member, fastener chain and method for producing aluminum alloy fastening member
AssigneeYKK Corporation
InventorsYuki Urita, Atsushi Ogihara, Shigeru Tsuchida, Chikako Hiromi, Ryota Ara, Sohei Nagasawa, Mitsuomi Katori, Misako Hosaka
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Abstract
An aluminum alloy fastening member has a novel chemical includes conversion coating as a colored coating, a fastener chain. A method producing the aluminum alloy fastening member. The aluminum alloy fastening member includes a chemical conversion coating containing manganese as a component element, and the chemical conversion coating satisfies hue ranges of −3≤a*≤12, −5≤b*≤35, and 45≤L*≤80 in a CIELAB color space as defined by JIS Z 8781-4 (2013).
Claims7
An aluminum alloy fastening member comprising a chemical conversion coating containing manganese as a component element,
- wherein the chemical conversion coating satisfies hue ranges of 0≤a*≤10, 5≤b*≤18, and 45≤L*≤60 in a CIELAB color space as defined by JIS Z 8781-4 (2013), and
- wherein the aluminum alloy has a composition represented by a general formula AlxSiyMgc, in which:
- each of x, y, and c is % by mass;
- symbol x is a balance;
- 0.1≤y≤1.5;
- 4.5≤c≤5.6;
- and
- unavoidable impurities are configured to be contained,
- wherein the aluminum alloy fastening member comprises a clear coating on the chemical conversion coating, and
- wherein the clear coating has an average thickness of 1.7 μm or more and 36.5 μm or less.
Dependencies are inferred from the claim text.