ASTM D5828 Standard Test Method for Compatibility of Supplemental Coolant Additives (SCAs) and Engine Coolant Concentrates
1.1 This test method covers determination of the compatibility of commercial SCA and commercial ethylene and propylene glycol engine coolant concentrates. This test method focuses on the solubility of specific chemical species formed in the engine coolant. The short duration of the test (24 h), among other restrictions, makes the test method of limited use for sorting out a variety of chemical compatibility problems in which a component of the SCA may react with a component of the coolant additive package. The test as currently written also does not deal with the issue of hard water compatibility, in which a component of the coolant or SCA additive package reacts with the hardness (Ca and Mg) to form a precipitate.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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.
2. Referenced Documents
2.1 ASTM Standards:
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
D1193 Specification for Reagent Water
D1796 Test Method for Water and Sediment in Fuel Oils by the Centrifuge Method (Laboratory Procedure)
D3585 Specification for ASTM Reference Fluid for Coolant Tests
3.1 Definitions of Terms Specific to This Standard:
3.1.1 engine coolant concentrate - an undiluted ethylene or propylene glycol containing additives and only a small amount of water, usually less than 5 %.
3.1.2 reference engine coolant concentrate - a standard material prepared according to the formulary given in Annex A2 of this test method. This material should not be confused with reference coolant in accordance with Specification D3585.
3.1.3 reference supplemental coolant additive (SCA) - a standard SCA prepared according to the formulary given in Annex A1 of this test method.
3.1.4 supplemental coolant additive - a liquid or solid material that is added to a coolant at a specified concentration.