EXPLOSIVE REACTIVITY OF LUBRICANTS: ASTM D3115
EXPLANATION
Explosive reactivity has resulted when parts made from some light alloys, typically high in aluminum and magnesium, are loaded under shear conditions while in contact with certain lubricants. A typical example is a threaded part, lubricated with a chlorofluorocarbon grease, pulled up normally tight. This test method is used to evaluate the explosive reactivity of lubricants in the presence of aerospace alloys under high shear conditions. The results of this test may be used as elements of a fire-hazard assessment which takes into account all other factors pertinent to a fire hazard.
TEST SUMMARY
A shaped dowel pin made of the test material is rotated at 1760 r/min under a pressure of 689 MPa (1000 psi) for 1 min in a shaped hole (drilled into a block of the test material) containing the test lubricant. Observation for indications of reaction is made.
TEST PRECISION
This test method is expected to have a repeatability not to exceed more than one reaction per set of six runs. The reproducibility should not exceed a difference of 108 % of the mean number of reactions.
