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MULTICOMPONENT Al-BRONZE COATINGS THERMALLY SPRAYED ONTO TIN BRONZE SUBSTRATE: MICROSTRUCTURAL, MECHANICAL AND CORROSION CHARACTERIZATION IN A 3.5% NaCl SOLUTION

Author

Listed:
  • T. MANA

    (Department of Mechanical Engineering, Laboratory of Materials Technology and Process Engineering, Faculty of Technology, University of Bejaia, 06000 Bejaia, Algeria)

  • A. ATI

    (Department of Mechanical Engineering, Laboratory of Materials Technology and Process Engineering, Faculty of Technology, University of Bejaia, 06000 Bejaia, Algeria)

  • B. ZAID

    (#x2020;Department of Metallurgy, Nuclear Research Center of Draria, BP 43 Seballa, Draria, 16000 Alger, Algeria)

  • N. SOUAMI

    (#x2021;Department of Spectrometry, Nuclear Research Center of Algiers, 2Bd Frantz Algeria)

Abstract

In this work, multicomponent Al-bronze alloys coated Tin-Bronze substrates, fabricated by thermal flame spraying, are characterized by X-ray diffraction and scanning electron microscopy coupled with energy dispersive spectroscopy. Mechanical characterizations are also presented: microhardness measurement and friction coefficient. The electrochemical behavior of tin-bronze samples uncoated and coated with multicomponent Al-Bronze coatings is studied in NaCl 3.5% solutions using potentiodynamic polarization curves and polarization resistance measurements. The microstructure of the coatings has a lamellar morphology. Each lamella is constituted of a mixture of Cu3Al globular micro precipitates (β-phase) uniformly distributed over the solid solution matrix (α-Cu). An oxide based on Cu, Al and Fe is also present in very low concentration. β-phase is unexpected because it is present only above 570∘C in the Cu-Al phase diagram. Compared with the tin-bronze substrate, multicomponent Al-bronze coatings show a friction coefficient three times lower and have a better electrochemical behavior in 3.5% NaCl solution.

Suggested Citation

  • T. Mana & A. Ati & B. Zaid & N. Souami, 2020. "MULTICOMPONENT Al-BRONZE COATINGS THERMALLY SPRAYED ONTO TIN BRONZE SUBSTRATE: MICROSTRUCTURAL, MECHANICAL AND CORROSION CHARACTERIZATION IN A 3.5% NaCl SOLUTION," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 27(04), pages 1-10, April.
    • Handle: RePEc:wsi:srlxxx:v:27:y:2020:i:04:n:s0218625x19501403
    DOI: 10.1142/S0218625X19501403
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