ASTM D5968 Test Method for Evaluation of Corrosiveness of Diesel Engine Oil
7. Preparation of Apparatus
7.1 Cleaning of Glassware from Previous Run:
7.1.1 Rinse all glassware items and the air tube adapter with degreasing solvent to remove residual oil, and air dry. (Warning - Harmful if inhaled.)
7.1.2 Fill or immerse the sample tube, air tube, and the 9-mm glass spacers in carbon remover at room temperature until carbonaceous deposits are removed. Water rinse after removal. (Warning - Corrosive, causes severe burns.)
7.1.3 Wash all glassware items and the air tube adapter with detergent. Rinse with water to remove detergent, and dry.
7.1.4 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.
7.1.5 A more elaborate glass cleaning procedure can be used, if it is for a given situation. This cleaning procedure is necessary in a referee situation unless a cleaning solution can be used which is satisfactory to all parties involved. Fill and immerse all glassware items with glassware cleaning solution and soak for 3 to 16 h. (Warning - Corrosive, causes severe burns.)
7.1.6 Remove glassware from cleaning solution, rinse several times with tap water, followed by distilled water, and oven dry.
7.2 Cleaning of Glassware (New):
7.2.1 Proceed as in 7.1.3 and 7.1.6 in that order (omit 7.1.1, 7.1.2, 7.1.4, and 7.1.5).
7.3 Assembly - Assemble as shown in Fig. 6 using only the test oil to lubricate glass joints during assembly.
7.4 Preparation of Metal Specimens:
7.4.1 Wash a length of the metal tying wire with tetrahydrofuran and acetone and allow to dry. (Warning - This and the following preparation processes should be performed under a fume hood.)
7.4.2 The metal squares are prepared as follows:
7.4.2.1 Using the 240 grit abrasive paper, remove all surface blemishes from both sides and all four edges of each square, and any burrs from the drilled holes. Finish polishing with 400 grit paper wetted by acetone to remove marks from previous polishing. A good technique is to place abrasive paper on a flat surface, then rub the specimen with longitudinal strokes in a direction perpendicular to that used with 240 grit paper. Use a different sheet of paper for each metal type.
7.4.2.2 In all succeeding steps, handle the squares only with tongs or filter paper until the final weighing. If large defects or particles are present on the metal coupons, course sand paper should be used first to remove them; this is followed by polishing with the 240 and 400 grit abrasive paper.
(1) Store the polished metal coupon in tetrahydrofuran and proceed until all coupons are polished.
(2) Remove each square from the tetrahydrofuran, clean all metal dust from the square by rubbing vigorously with clean pads of absorbent cotton until a fresh pad remains unsoiled.
(3) Wash squares in tetrahydrofuran and allow them to dry in a dessicator.
(4) Immediately weigh each square to within 0.1 mg.
(5) Arrange all squares in the wooden assembly fixture in the pattern shown in Fig. 7. The sequence should be: lead, copper, tin, phosphor bronze.
7.4.2.3 Using only forceps to handle the clean wire, tie the squares together as shown in Fig. 7.
