XPS Investigation of the interaction between aluminium alloy and lubricating oil additives

• Autorzy: Hu L. , Chen J. , Kajdas Cz.

Warianty tytułu

PL

Badanie interakcji dodatków tribologicznych oleju smarowego ze stopem AL 2024

• Języki publikacji: EN

Abstrakty

EN

The present paper relates to research focused on the aluminum alloy (Al 2024) interaction with 10 different additives and their impact on tribological characteristics of a steel-on-Al alloy friction contact system. Oil immersion tests of Al 2024 in several lubricants composed of a liquid paraffin containing 2 wt.% of most effective additives were conducted at several temperatures. The formed films on the aluminum alloy surface were tested with Kyowa Model DF.PM one-way reciprocating tribometer against 3.0 mm diameter AISI 52100 steel ball. Friction coefficients and the aluminum alloy wear were measured. Conventional tests lubricated with all the oils were also performed using the same apparatus and SRV friction machine. The composition and chemical states of the formed films on the aluminum alloy were investigated with X-ray electron spectrometry (XPS). The obtained results clearly demonstrate that dibutyl phosphite and zinc dialkyl dithiopho-sphate react with the aluminum alloy at elevated temperatures forming aluminum phosphite or aluminum phosphate, respectively. These two additives were found to be the most effective in lubrication of the investigated steel-on-aluminum alloy system.

PL

Badano wpływ oleju parafinowego zawierającego różne dodatki na właściwości tribologiczne układu tarciowego stal-stop aluminium Al 2024. Przeprowadzone eksperymenty obejmowały: (i) testy imersyjne Al 2024 w oleju zawierającym 2% badanego dodatku, (ii) oznaczenie wpływu utworzonego w warunkach testu imersyjnego filmu na zmianę współczynnika tarcia i zużycia stopu w układzie tarciowym kulka stalowa/Al 2024 (tribometr Kyowa DF.PM) oraz (iii) konwencjonalnie smarowane testy tribologiczne w takim samym układzie materiałowym, przeprowadzone w takim samym układzie materiałowym na maszynie tarciowej SRV. Skład chemiczny filmów imersyjnych i obszarów zużycia stopu Al badano za pomocą spektroskopii fotoelektronów wybijanych promieniowaniem rentgenowskim (XPS). Stwierdzono, ze fosforyn dibutylu (DBP) i ZDDP reagują z powierzchnią stopu Al tworząc odpowiednio fosforyn i fosforan aluminium. Spośród przebadanych 10 dodatków DBP i ZDDP dają najlepsze efekty smarowania układu tarciowego stal LH15/A12024.

Słowa kluczowe

EN

steel-on-aluminium friction contact; antiwear additives; boundary lubrication; oil immersion test; friction tests; wear testing; XPS analysis

PL

kontakt tarciowy układu stal/aluminium; dodatki AW; smarowanie graniczne; test imersyjny; testy tarciowe; testy zużyciowe; analiza XPS

• Wydawca: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
• Czasopismo: Tribologia
• Rocznik: 2001
• Tom: nr 1
• Strony: 7--22
• Opis fizyczny: bibliogr. 14 poz., tab., wykr.

Twórcy

autor

Hu L.

• State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China.

autor

Chen J.

• State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China.

autor

Kajdas Cz.

• Institute of Chemistry, Warsaw Technical University in Płock, 00-400 Płock, Poland.

Bibliografia

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