Engine part

Details Engine part Engine part

2005-08-04

2010-06-01

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S272000, C060S312000, C060S322000, C060S323000, C060S324000

Reexamination Certificate

active

07726121

ABSTRACT:
An engine part has a construction which prevents the surface discoloration/deterioration associated with a high-temperature exhaust gas, irrespective of the type of Cr used in the formation of a chromium plating layer (hexavalent chromium or trivalent chromium). The engine part includes a metal substrate, a chromium plating layer covering at least a region of a surface of the metal substrate, the region being heated to a temperature of about 350° C. or more, and an intermediate plating layer provided between the metal substrate and the chromium plating layer. The chromium plating layer has a thickness of about 0.2 μm or more in the region.

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European Search Report dated Dec. 9, 2005, issued in the corresponding European Patent Application No. 05017075.2-2119.
Official communication issued in counterpart European Application No. 05 017 075.2, mailed on Aug. 5, 2008.

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