Lubricants Quality Check Part 2: Rust Protection Test

Various rust protection tests are performed on ferrous or steel materials, to provide guidance on a lubricant’s capability to retard rust formation.  A common test based on ASTM D665 calls for the immersion of cylindrical steel specimen into a bath with the test-lubricant.   Over a period of 4 or 24 hours, seawater is introduced to the bath to accelerate rust formation.   The steel specimen should exhibit no rust formation whatsoever after the test, to gain a “pass” rating.

As almost all machinery components contain steel, this test is a very useful guide to the maintenance or lubrication practitioner.

DID YOU KNOW that the application method for Rust Preventives Oils (RPO) can affect rust protection performance?

While brushing and spraying are effective means to apply RPO’s, the dipping or bath method is deemed most effective as it endures full coverage on the workpiece. In addition, a dip or bath system provides the thinnest possible effective film on the metal surface, as one can suspend the workpiece for a few seconds after dipping, allowing excess film to drip back to the tank.

For more ideas and knowledge about industrial lubricants, you can check out our other blogs! Fluid Solutions is the best industrial lubrication service provider in the Philippines. We offer various industrial lubrication products like Food Grade Oils and Greases, High Performance Greases, Specialty Lubrication, Maintenace Equipment, Metalworking Fluids,a and many more! Contact us at (02) 696-7120 or email us at for more information!

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