ASTM D4049 Standard Test Method for Determining the Resistance of Lubricating Grease to Water Spray
8. Sampling
8.1 Each test will require a quantity sufficient to cover the steel panel (approximately 4 to 12 g).
8.2 Supply a 25-g (minimum) representative sample.
8.3 Examine for any indication of nonhomogeneity, such as oil separation, phase changes, or gross contamination. If any abnormal conditions are found, obtain a new sample.
9. Preparation of Apparatus
9.1 Clean the test panel by brushing with mineral spirits. Then rinse with n-heptane and air dry. (Warning - See 7.2 and 7.3.)
9.2 Clean reservoir by flushing with water and wipe off any residual oil film from the surfaces of the reservoir and from the spray chamber area. Disassemble and clean the spray nozzle, taking care to properly position the vane in the cone body during assembly. This shall be done after each test.
NOTE 1 - For proper vane orientation, see Fig. 4.
9.2.1 Visually inspect apparatus prior to each test to ensure cleanliness.
