CORROSION AND TRIBOLOGICAL PROPERTIES OF A NOVEL IONIC LIQUID BASED HIPPURATE

Abstract

Abstract: Three ionic liquids based hippurate were synthesized: 1-butyl-3-methylimidazolium hippurate ([BMIM][Hip]), choline hippurate ([CHO][Hip])and tributyltetradecylphosphonium hippurate ([P₄₄₄₁₄][Hip]). The corrosion of the three ionic liquids to mild steel and the tribological performances of the three ionic liquids as lubricants the steel/steel friction pairs were investigated by electrochemical measurements and frictional tests, respectively. The traditional ionic liquids [BMIM][BF₄] was selected as a comparison. The results showed that traditional ionic liquids [BMIM][BF₄] had strong corrosion to mild steel. The three synthesized ionic liquids had very low corrosion to mild steel, and [CHO][Hip] had the least corrosion. The three synthesized ionic liquids showed excellent tribological performances the steel/steel friction pairs, [BMIM][Hip], [CHO][Hip] and [P₄₄₄₁₄][Hip] were 9.3%, 5.3% and 18.1% of the friction pairs worn by [ BMIM ][ BF₄], respectively.

Key words: ionic liquids, hippurate, corrosivity, lubricants, tribological property

References

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