ASTM D6594 method for evaluation of corrosiveness of diesel engine oil at 135 °C
8. Preparation of Apparatus
8.1 Cleaning of Glassware:
8.1.1 Rinse all glassware items and the air tube adapter with degreasing solvent to remove residual oil, and air-dry.
8.1.2 Wash all glassware items and the air tube adapter with detergent. Rinse with tap water, distilled water, and dry.
8.1.3 Store all items in a dust-free cabinet until needed for test. If stored longer than one week, rinse again with distilled water before use, and dry.
8.1.4 The following more thorough glassware cleaning procedure can be used, if it is required for a given situation:
8.1.4.1 Fill and immerse all glassware items with glassware cleaning solution (see 7.6) and soak for 3 to 16 h. (Warning - Corrosive, causes severe burns.)
8.1.4.2 Remove glassware from cleaning solution; rinse several times with tap water, followed by distilled water, and oven-dry.
8.1.4.3 This more thorough glass cleaning procedure is necessary in a referee situation, unless an alternative glassware cleaning solution is available which is satisfactory to all parties involved.
8.2 Assembled Apparatus, shown in Fig. 6.
8.3 Preparation of Metal Specimens:
8.3.1 In all succeeding steps, handle the specimens only with stainless steel forceps or powder-free gloves until the final weighing. If large defects or particles are present on the metal specimens, remove them first using coarse sandpaper, followed by polishing with the 240 and 400-grit abrasive papers, as described in 8.3.2.
8.3.2 Using a sanding block with a specimen holder, remove all surface blemishes from both sides and all four edges of each specimen with 240-grit abrasive paper. Remove any burrs from the drilled holes with a 1/16 in. drill bit. Finish polishing with 400-grit paper wetted by acetone to remove marks from previous polishing.
8.3.2.1 A good technique is to rub the specimen with longitudinal strokes in direction perpendicular to that used with 240-grit paper. Use a different sheet of paper for each metal type.
8.3.2.2 Make sure that the specimen edges are polished in the same manner as the surfaces. Carry out this procedure using normal room lighting and without magnification of the specimen surface. Do not scribe or otherwise mark the surfaces.
8.3.3 Store the polished metal specimens in tetrahydrofuran.
8.3.4 Just prior to a test start, remove each specimen from the tetrahydrofuran, and clean all metal dust from the specimen using 100 % cotton. Rub with a light-to-medium touch to remove particles but do not polish the specimen further.
8.3.5 Wash specimens in tetrahydrofuran and allow them to dry in a desiccator.
