Friction and wear behaviors of aluminum-on-steel under the lubrication of grease containing a complex of lanthanum dialkyldithiocarbamate and phenanthroline |
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| Affiliation: | 1. School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. Guangdong Meizhi Compressor Co. Ltd, Guangdong 528333, China;1. Medical University of South Carolina, Department of Psychiatry and Behavioral Sciences, Clinical Neurosciences Division, Charleston, SC 29425, USA;2. University of California at Los Angeles, Department of Psychology, Los Angeles, CA 90095, USA |
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| Abstract: | A complex of lanthanum dialkyldithiocarbamate and phenanthroline was synthesized, and its lubricating and antiwear behaviors as an additive in lithium grease were evaluated using a Timken tester with a SAE52100 steel ring sliding under an A1 2024 block. As a comparison, the wear behavior of a steel-on-steel system under the lubrication of the same grease was also investigated under the same test conditions. The protective film formed on the rubbed surface of aluminum was investigated by both XPS and AES. Results of friction and wear tests indicate that this rare earth complex possess good antiwear ability for aluminum, and its antiwear and friction reduction properties for the aluminum-on-steel system is even superior to that for the steel-on-steel system. The results of AES and XPS analyses illustrate that the prepared La complex as an additive in lithium grease forms a protective film containing lanthanum oxide, aluminum sulphide, and an organic compound containing sulfur and nitrogen on the rubbed surface of aluminum. |
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