EUROLAB laboratory provides testing and compliance services within the scope of ASTM D4048 standard. The ASTM D4048 standard covers the determination of the abrasiveness of lubricating grease to copper. The Copper Corrosion test is known as a grease copper corrosion test to ensure that a grease will protect the metal surfaces it comes in contact with over time.
The test begins with the technician polishing a copper strip sample. The sample is then completely immersed in a tightly packed grease sample, which is heated in an oven or liquid bath at a specified temperature for a specified period of time. Commonly used test conditions are 24°C +/- 5°C for 100 hours +/- 1 minutes. Both time and temperature conditions may vary depending on your product application.
At the end of this heating period, the technician will remove the grease from the copper strip, wipe off the excess grease, and then wash the copper coupon with acetone. The copper strip is then visually compared to the ASTM Copper Strip Corrosion Standards. This test is subjective because the results are determined by the eyes of the individual technician performing the test.
The technician will report the results as a number followed by a letter according to ASTM ranges. These ranges include freshly polished, lightly blackened (1a to 1b), medium blackened (2a to 2e), dark blackened (3a to 3b), and corrosion (4a to 4c).
This test is often done for automotive companies to determine how suitable a lubricant is for lubricating parts such as bearings containing copper or copper alloys, as corrosion can cause premature bearing failure. While this test does not measure the grease's ability to prevent copper corrosion caused by factors other than the grease itself or the stability of the grease in the presence of copper, it does ensure that the grease protects the metal surface.
Values stated in SI units should be accepted as standard. Values given in parentheses after SI units are for information purposes only and are not considered standard.
This standard does not purport to address all, if any, safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.
Our organization, EUROLAB, provides standard test method services for the detection of copper corrosion caused by lubricating grease, within the framework of national and international standards, with its trained and expert staff and advanced technological equipment, among numerous test, measurement, analysis and evaluation studies. Provides testing services within the scope of ASTM D4048 standard.
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EUROLABreporting and certification activities, United Accreditation Foundation (UAF), Turkish Accreditation Agency (TÜRKAK) ve Enterprise Accreditation Foundation (EAF) based on the accreditation provided by the accreditation body. The Enterprise Accreditation Foundation (EAF) accreditation body is also a signatory of the United Nations (UN GLOBAL COMPACT) organization.
