IS 1448 : Part 53 : 1979 Methods of test for petroleum and its products: Part 53 Determination of acidity and alkalinity of greases

1 Scope

1.1 This method describes procedures for the determination offree acid, free alkali, and insoluble carbonates in calcium,sodium, and lithium greases, but it is not applicable when thesoaps of lead, zinc, aluminium, or other weak bases are present.Erroneous results may also be obtained in the presence of certainadditives, for example, sodium nitrite.

Note - The soaps of the weak bases mentioned in 1.1 react withpotassium hydroxide, and no method is available whereby the acidityof greases containing them can be directly determined.

2 References

IS 323 : 1959Specification for rectified spirit

IS 1745 : 1978Specification for petroleum hydrocarbon solvents