Rust inhibitor for highly paraffinic lubricating base oil

A rust inhibitor comprising:

• a. a solubility improver having an aniline point less than 100° C.;
• b. a mixture of amine phosphates;
• and
• c. an alkenyl succinic compound selected from the group consisting of an acid half ester, an anhydride, an acid, and mixtures thereof;
• d. wherein the rust inhibitor provides a pass in the 4 hour TORT B rust test when used in an amount less than 25 weight percent in a finished lubricant;
• and wherein the amount of the mixture of amine phosphates in the finished lubricant is up to 0.01 wt %.

A rust inhibitor comprising:

• a. a solubility improver having an aniline point less than 100° C.;
• b. a mixture of amine phosphates;
• c. an alkenyl succinic compound that is an acid half ester;
• wherein the rust inhibitor provides a pass in the 4 hour TORT B rust test when used in an amount less than 25 weight percent in a finished lubricant that meets the requirements of the MIL-PRF-17331J specification.

A finished lubricant comprising:

• a. a rust inhibitor comprising:
• i. a solubility improver in an amount between about 0.10 to about 20 wt %,
• ii. a mixture of amine phosphates in an amount between about 0.001 to about 2 wt %, and
• iii. an alkenyl succinic compound selected from the group consisting of an acid half ester, an anhydride, an acid, and mixtures thereof in an amount between about 0.0005 to about 1.0 wt %;
• and
• b. a lubricating base oil in an amount between about 60 to about 98.5 wt %;
• wherein the finished lubricant meets the requirements of the MIL-PRF-17331J specification.

A rust inhibitor comprising:

• a. a solubility improver having an aniline point less than 100° C.;
• b. a mixture of amine phosphates;
• and
• c. an alkenyl succinic compound selected from the group consisting of an acid half ester, an anhydride, an acid, and mixtures thereof;
• wherein the rust inhibitor meets the requirements of the MIL-PRF 17331J specification and provides a pass in the 4 hour TORT B rust test when used in an amount less than 25 weight percent in a finished lubricant having a kinematic viscosity at 40° C. between about 414 cSt and 1700 cSt.