Research scientists at Northwestern University, sponsored by the Infrastructure Technology Institute, conducted a laboratory project “to study the effect of various lubricants on the wear and corrosion of metals recommended for bridge pin and eyebar connections”. Scientists ran corrosion tests in a salt fog chamber to replicate the environmental conditions United States bridges are exposed to. They used several types of metals and 7 competitive greases in their testing.

Findings are as follows:

• “Prolong EP-2 gave an exceptional reduction in corrosion rate”
• “Results show Prolong EP-2 Grease to be about 10 times more resistant to corrosion than a typical wheel bearing grease”

They ran a series of mixed grease tests on wear and corrosion resistance and concluded, “None of the mixed greases performed as well as Prolong EP-2 Grease, however, there was some reduction in corrosion as the percent of Prolong EP-2 increased”.
R. H. Krueger, Research Scientist
Northwestern University