Method of plating an automotive exhaust pipe
AssigneeDynaflex Products
InventorCory Pehrsson
Life of this patent
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Abstract
A method of protecting a metal pipe from corrosion, comprises depositing a layer of nickel composition over both inside and outside of the pipe, and depositing a layer of chrome over the nickel composition on the outside of the pipe. The nickel composition is preferably deposited using an electroless plating, and the chrome is preferably deposited using electroplating. Pipes coated using these methods are particularly useful for sections of exhaust system of a diesel engine having a particulate filter and a selective catalytic reduction system upstream of the coated pipes sections. Straight, bent, and “Y” pipe sections are all contemplated, including large pipes having inside diameters of 4″-8″.
Claims10
An exhaust pipe for an internal combustion engine, the exhaust pipe comprising:
- a first coating over (a) an inside of at least a portion of the exhaust pipe, and (b) an outside of the portion of the exhaust pipe, the first coating comprising electrolessly plated nickel;
- and
- a second coating over the first coating on the outside of the portion of the exhaust pipe, the second coating comprising chrome.
Dependencies are inferred from the claim text.