ASTM D6138 Method for Corrosion-Preventive Properties of Lubricating Greases
ASTM D6138 Standard Test Method for Determination of Corrosion-Preventive Properties of Lubricating Greases Under Dynamic Wet Conditions (Emcor Test)
6. Apparatus
6.1 Test Bearings - Use a double row self-aligning ball bearing (30 by 72 by 19 mm), conforming to 1306 K of ISO 15, with a steel cage. In cases of dispute, the SKF bearing specified in Footnote 5 shall be used as the referee bearing.

6.2 SKF TMG/Emcor Test Machine, see Annex A1 for description.

6.3 Dentist's Mirror, non-magnifying.

6.4 Graduated Pipette, capable of measuring 20 more or less 1 mL water.

6.5 Oven, capable of maintaining 90 more or less 2°C.

7. Reagents
7.1 Purity of Reagents - Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are available. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination.

7.2 Purity of Water - Unless otherwise indicated, references to water shall be understood to mean reagent water as defined by Grade 2 of ISO 3696.

7.3 Synthetic Sea Water - If required, as specified in Specification D665, and ISO 7120.

7.4 Sodium Chloride Solution - a 0.5-mol/L solution of sodium chloride prepared using water conforming to Grade 2 of ISO 3696, at a pH of 8.0 to 8.2 adjusted by titration with sodium hydroxide solution.

NOTE 1 - Other water types, such as that specified in Specification D1193, Type III, can be used in this test method, although the precision when using other water types has not been determined. It is recommended that the pH of the other water types is determined before use.

7.5 Isopropyl Alcohol - (Warning - Flammable. Poison. Causes burns. Vapor extremely irritating. May be fatal if swallowed. Harmful if inhaled.)

7.6 Ammonium Hydroxide - (Warning - Flammable. Poison. Causes burns. Vapor extremely irritating. May be fatal if swallowed. Harmful if inhaled.)

7.7 Solvent Rinse Solution, of the following composition by volume:
7.7.1 90 % Isopropyl alcohol.

7.7.2 9 % Distilled water.

7.7.3 1 % Ammonium hydroxide, 3.2-mol/L concentration. (Warning - Flammable. Poison. Causes burns. Vapor extremely irritating. May be fatal if swallowed. Harmful if inhaled.)

7.8 Mineral Spirit, also known as Stoddard Solvent, reagent grade. (Warning - Combustible. Vapor Harmful.)