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US 6,888,293 B2Granted
Protective coating for ignition device
AssigneeRobert Bosch GmbH
InventorsManfred Roessler, Klaus Hrastnik, Thomas Jaeger, Christoph Brehm
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Abstract
An ignition device, particularly a spark plug for internal combustion engines, permits improved corrosion protection. The ignition device includes an electrical connector and a tubular, metallic housing having a screw-in thread imprinted on it. At least one of the metallic components of the ignition device is provided at least partially with a protective coating made of a zinc/nickel alloy.
Claims10
An ignition device comprising:
- metallic components including an electrical connector, a tubular metallic housing and a screw-in thread imprinted on the tubular metallic housing, at least one of the metallic components being provided, at least partially, with a protective coating made of a zinc/nickel alloy;
- wherein a nickel portion of the alloy lies in a range between 4% and 20% by mass.
Dependencies are inferred from the claim text.