ASTM D1287 pH of Engine Coolants and Antirusts
Engines generate heat during normal operation. Coolants absorb and dissipate this heat to lessen the risk of thermal damage to system components. If the coolant degrades and becomes acidic during use, metals in the cooling system may be at risk of acid damage, hence coolants often contain buffers and acid-absorbing additives. This test determines the pH of engine coolants and antirusts.
The sample is diluted with water if necessary. The pH is determined with a calibrated electrode system and reported to the nearest 0.1 pH unit. Please specify the desired dilution.