CPC H01T 13/06 (2013.01) | 8 Claims |
1. A metallic shell for a spark plug, the metallic shell comprising:
a tubular metallic shell body;
a metal plating layer provided on a surface of the metallic shell body; and
a chromium-containing chemical conversion coating layer provided to cover the metal plating layer, wherein the chemical conversion coating layer has a zirconium component content of 0.1 mass % or more.
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