Vapor phase corrosion inhibition
OwnerPeter Miatt, Michael P. Gahagan +4inventors
InventorsPeter Miatt, Michael P. Gahagan, Mark J. McGuiness, Simon D. Evans, Binbin Guo, Gregory J. Hunt
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Abstract
The disclosed technology relates to the inhibition of corrosion on electrically conductive componentry subjected to a lubricant composition, but that is not submersed in the lubricant composition, or in other words, vapor phase corrosion inhibition. The technology more particularly relates to the use of azole compounds capable of inhibiting corrosion of the electrically conductive componentry in the vapor space above a lubricant composition, and often in the liquid phase of the lubricant composition as well.
Claims27
A method of lubricating an automotive device having electrically conducting componentry comprising
- a. providing an automotive device comprising electrically conducting componentry, some portion of said componentry being dry,
- b. delivering to the automotive device a lubricant composition comprising
- i. an oil of lubricating viscosity,
- ii. an azole compound capable of inhibiting corrosion of the electrically conductive componentry in the vapor space above the lubricant composition comprising
- 1. an N-substituted 1,2,4 triazole
- where R1 and R2 are C3-C22 hydrocarbon groups, either linear or branched, or two ends of a hydrocarbon chain forming a cyclic structure, or where one of R1 or R2 is H, or
- 2. an azole-acrylic adduct formed by contacting an azole compound with an acrylate ester, acrylic acid, acrylamide or combination thereof;
- and said adduct has at least one nitrogen-alkyl group comprising at least one acyl group,
- c. operating the automotive device.
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The method of any previous claim, further comprising a thiadiazole corrosion inhibitor in the absence of a phosphite.
A lubricant composition comprising
- a. an oil of lubricating viscosity,
- b. an azole compound capable of escaping the lubricant composition and inhibiting corrosion in a space above the lubricant composition comprising
- i. an N-substituted 1,2,4 triazole
- where R1 and R2 are C3-C22 hydrocarbon groups, either linear or branched, or two ends of a hydrocarbon chain forming a cyclic structure, or where one of R1 or R2 is H, or
- ii. an azole-acrylic adduct formed by contacting an azole compound with an acrylate ester, acrylic acid, acrylamide or combination thereof;
- and said adduct has at least one nitrogen-alkyl group comprising at least one acyl group, and
- c. at least one of a Lewis acid, Bronsted acid, or Lewis base.
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Dependencies are inferred from the claim text.