ASTM D6594 method for evaluation of corrosiveness of diesel engine oil at 135 °C
6. Apparatus
6.1 The main apparatus consists of the following items of standard wall borosilicate glassware as shown in Figs. 1-6.
6.1.1 Main Sample Tube, Fig. 1.
6.1.2 Sample Tube Head, Fig. 2.
6.1.3 Air Tube, Fig. 3.
6.1.4 Thermocouple Tube, Fig. 4.
6.1.5 Condenser, Allihn Type, Fig. 5.
6.1.6 Assembled Apparatus, Fig. 6.
6.2 Additional glassware items and assembly accessories needed are:
6.2.1 Hanger (for metal specimens), of stainless steel, having the dimensions listed in Fig. 7.
6.2.2 Adapter, polytetrafluoroethylene for 10/18 joint for sealing of the air tube to the sample tube head.
6.3 Other items and equipment are:
6.3.1 Heating bath, with constant temperature control within +/-0.5°C (+/-1°F) of test temperature with an immersion depth of 250 +/- 20 mm. Oil baths are recommended. (Warning - There are exposed hot surfaces on apparatus. Avoid skin contact by use of protective equipment.)
6.3.2 Ventilation, to adequately remove fumes during heating.
6.3.3 Dry Air Supply, with a dew point of -68°C.
6.3.3.1 When air needs to be conditioned an air drier is required. The method used is optional provided the air characteristics of 6.3.3 are attained. For drying, a satisfactory method is the use of a glass column containing 8-mesh anhydrous calcium sulfate with a column diameter such that velocity of air does not exceed 1.2 m/min.
6.3.4 Flowmeter, capable of measuring 10 +/- 1 L/h.
6.3.5 Balance, with a capacity of 2500 g and sensitivity of 0.1 g.
6.3.6 Syringe, capable of accurately measuring out 100 mL of liquid.
6.3.7 Oven, optional, to dry glassware at elevated temperature.
6.3.8 Forceps, stainless steel; or gloves (powder free).
6.3.9 Thermocouple, or equivalent. Use sheathed thermocouple when used directly in contact with oil. Use unsheathed thermocouple when thermocouple well is used; fill thermocouple well with a heat transfer medium.
6.3.10 Sanding Block and Holder, for specimen preparation.
7. Reagents and Materials
7.1 Purity of Reagents - Use reagent grade chemicals in all tests. Unless otherwise indicated, it is intended that all reagents conform to the specifications maintained by the Committee on Analytical Reagents of the American Chemical Society.
7.2 Metal Specimens
7.2.1 Specimens are 0.081 cm thick by 2.5 cm square, except that lead specimen that is 0.178 cm thick. One specimen from each of the following metal types, each with two drilled holes, is required:
7.2.1.1 Copper (R401-A),
7.2.1.2 Lead (R401-lead),
7.2.1.3 Tin (R401-tin), and
7.2.1.4 Phosphor Bronze (R401-PBz).
7.3 Abrasive Paper, 8240-grit aluminum oxide and 400-grit silicon carbide. Do not use iron-containing abrasives such as natural emery.
7.4 Cotton, 100 %.
7.5 Acetone (ACS), sulfur free. (Warning - Flammable. Health hazard.)
7.6 Glassware Cleaning Solution, NOCHROMIX. (Warning - Causes severe burns.)
7.7 Tetrahydrofuran (THF). (Warning - Toxic and flammable. Health hazard.)
7.8 Degreasing Solvent, (THF recommended).
7.9 Naphtha, Aromatic. (Warning - Flammable. Health hazard.)
7.10 Reference Oil.
