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A Tribological and Electrochemical Study of Protic Ionic Liquid and Bentonite Particles Used as Lubricating Additives in Water-Based Lubricants

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Abstract

The objective of this work is to evaluate the wear and corrosion behaviours of different formulations of water-based lubricants containing protic ionic liquid (PIL) and bentonite particle additions. Carbon-steel samples were investigated in the normalized and quenched-tempered conditions. Wear tests and corrosion tests using potentiondynamic polarization curves were performed in the presence of different lubricant solutions (PIL 3 wt% + deionized water, with 0.05 wt% and 0.1 wt% bentonite particle additions). Wear scar surfaces were analysed by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and Raman techniques. Unexpected electrochemical effects caused by the bentonite addition promoted the formation of a thick oxide film (Fe3O4) in the quenched-tempered steel during the wear test, which mitigated the wear in the presence of a minimum amount of this particle in the formulation.

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Funding

The authors are grateful to the financial support of CAPES, Coordination for the Improvement of Higher Educational Personnel, Brazil (PROEX 23038.000341/2019-71); Victor Velho de Castro thanks CNPq—National Council for Scientific and Technological Development, Brazil. (Grant: 166262/2018-8) and FAPERGS (Grant 22/2551-0001071-7); Célia de Fraga Malfatti thanks CNPq—National Council for Scientific and Technological Development, Brazil (Grant: 307723/2018-6); Carlos Alexandre dos Santos thanks CNPq—National Council for Scientific and Technological Development, Brazil (Grant: 403303/2016-6).

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Authors and Affiliations

  1. Department of Metallurgy, Corrosion Research Laboratory (LAPEC), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil

    Victor Velho de Castro, Leonardo Marasca Antonini, Roberto Moreira Schroeder & Célia de Fraga Malfatti

  2. School of Technology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil

    Leonardo Moreira dos Santos, Sandra Einloft & Carlos Alexandre dos Santos

  3. Department of Chemical Engineering, Laboratory of Applied Thermodynamics, Federal University of Bahia (UFBA), Salvador, Bahia, Brazil

    Silvana Mattedi

  4. Department of Inorganic Chemistry, Bioanalytical Laboratory,, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil

    Klester S. Souza

  5. Institute of Physics, Laser & Optics Group, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil

    Marcelo Barbalho Pereira

  6. Federal Institute of Science and Technology of Rio Grande do Sul (IFRS), Caxias do Sul, Rio Grande do Sul, Brazil

    Cleber Rodrigo de Lima Lessa

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  1. Victor Velho de Castro
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Contributions

VVdC: conceptualization; data curation; formal analysis; investigation; methodology; writing, review & editing; LMdS: data curation; formal analysis; investigation, review & editing; LMA: investigation; writing, review & editing; RMS: data curation; formal analysis; investigation; supervision; validation; review & editing; SM: supervision; review & editing; KSS: investigation, supervision; review & editing; MBP: investigation, supervision; review & editing; CRdLL: review & editing; SE: supervision; review & editing; CAdS: supervision; data curation; review & editing; CdFM: conceptualization; data curation; formal analysis; investigation; methodology; project administration; supervision; validation; visualization; review & editing.

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Correspondence to Victor Velho de Castro.

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de Castro, V.V., dos Santos, L.M., Antonini, L.M. et al. A Tribological and Electrochemical Study of Protic Ionic Liquid and Bentonite Particles Used as Lubricating Additives in Water-Based Lubricants. J Bio Tribo Corros 9, 51 (2023). https://doi.org/10.1007/s40735-023-00770-9

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