Lube-Tech


considered incompatible and no further testing need be completed. If all mixtures pass the three primary tests, the greases are considered compatible and may proceed to non-mandatory secondary testing.


Secondary tests are determined based on the circumstances and/or desired application of the greases. The following flowchart illustrate the testing process for this report:


PUBLISHED BY LUBE: THE EUROPEAN LUBRICANTS INDUSTRY MAGAZINE


No.132 page 2


1. Biobased EP Premium (NLG GC-LB rated) – Lithium Complex Grease


2. Biobased EP Plus (NLGI LB rated) – Lithium Complex


3. Biobased Aluminum Complex – Food Machinery (NSF registered)


4. Mineral Oil-based Polyurea Grease (NLGI GC-LB rated)


5. Mineral Oil-based Lithium Complex (NLGI GC-LB rated)


Table 1 shows the abbreviated technical data for the selected greases as published by their respective manufacturers.


Figure 1: Flowchart for Sequential Testing from ASTM International Greases selected


Studies of compatibility have primarily dealt with mineral oil base greases made with different thickeners. Since the interaction of additives especially at higher temperatures could play a major role in compatibility of the grease, the greases selected for this study were fully formulated commercial products. Until the effect of different additives on each other can be studied separately, the compatibility of the greases selected here may be considered as a reference for screening purposes. The following two mineral oil-based greases and three biobased greases were numbered for identification as follows:


26 LUBE MAGAZINE NO.161 FEBRUARY 2021


Table 1: Technical Data for Test Greases


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