The test method shall measure the deposit formation tendencies of liquids on steel surfaces in air at 101.3 KPa (1-atm) pressure. Other surfaces and other atmospheric media may be substituted for steel and air at 1 atm provided that the substitution is noted in the test report.

1.1 This test method covers the determination of the tendency of liquids in thin films and of vapors to form deposits on metal surfaces. The test method applies to both petroleum-based and synthetic lubricants, hydraulic fluids, heat-transfer fluids, and related materials.

1.2 The values stated in SI units are to be regarded as the standard. In cases where materials, products, or equipment are available in inch-pound units only, SI units are omitted.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see Section and Annex A2.