IDEAS home Printed from https://ideas.repec.org/a/wsi/srlxxx/v22y2015i01ns0218625x15500110.html
   My bibliography  Save this article

CHARACTERIZATION AND MICROHARDNESS OF ELECTRODEPOSITEDNi–WCOATINGS OBTAINED FROM GLUCONATE BATH

Author

Listed:
  • PARTHASARATHI BERA

    (Surface Engineering Division, CSIR–National Aerospace Laboratories, Bangalore 560017, India)

  • M. DINESH KUMAR

    (Surface Engineering Division, CSIR–National Aerospace Laboratories, Bangalore 560017, India)

  • CHINNASAMY ANANDAN

    (Surface Engineering Division, CSIR–National Aerospace Laboratories, Bangalore 560017, India)

  • C. SHIVAKUMARA

    (Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India)

Abstract

Ni–Walloy coatings are electrodeposited with direct and pulse current using gluconate bath at pH5. Effects of direct current (DC) and pulse current (PC) on structural characteristics of the coatings have been investigated by energy dispersive X-ray spectroscopy (EDXS), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), differential scanning calorimetry (DSC) and X-ray photoelectron spectroscopy (XPS). EDXS shows thatWcontents are 13.3 and 12.6 at.% in DC and PC (10:40)Ni–Wcoatings, respectively. FESEM analysis exhibits the homogeneous coarse nodular morphology in DC plated deposits. DSC studies reveal thatNi–Wcoatings are thermally stable up to 400°C. XPS studies demonstrate that DC plated coating has significant amount ofNiandWin elemental form along with their respective oxidized species. In contrast, mainly oxidized metals are present in the as-deposited coatings prepared with PC plating. The microhardness of pulse current (100:400) depositedNi–Wcoating is about 750 HK that is much higher than DC plated coating (635 HK). Heat treatment of the deposits carried out at different temperatures show a significant increase in microhardness which can be comparable with hard chromium coatings.

Suggested Citation

  • Parthasarathi Bera & M. Dinesh Kumar & Chinnasamy Anandan & C. Shivakumara, 2015. "CHARACTERIZATION AND MICROHARDNESS OF ELECTRODEPOSITEDNi–WCOATINGS OBTAINED FROM GLUCONATE BATH," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 22(01), pages 1-15.
    • Handle: RePEc:wsi:srlxxx:v:22:y:2015:i:01:n:s0218625x15500110
    DOI: 10.1142/S0218625X15500110
    as

    Download full text from publisher

    File URL: http://www.worldscientific.com/doi/abs/10.1142/S0218625X15500110
    Download Restriction: Access to full text is restricted to subscribers
    File URL: https://libkey.io/10.1142/S0218625X15500110?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wsi:srlxxx:v:22:y:2015:i:01:n:s0218625x15500110. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Tai Tone Lim (email available below). General contact details of provider: http://www.worldscinet.com/srl/srl.shtml .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.