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    Volume 6, Issue 1

    Corrosion Behavior of High and Low Temperature Austempered Ductile Iron (ADI) in Iron Ore Slurry

    (Received 25 May 2016; accepted 19 May 2017)

    Published Online: 2017

    CODEN: MPCACD

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    Abstract

    Corrosion behavior of austempered ductile iron (ADI) and forged EN31 steel balls in a ground iron ore slurry was studied as a function of time in the slurry, while the microstructure of ADI developed due to different tempering temperature and tempering time. The corrosion rates of the grinding balls immersed in the iron ore slurry were determined using electrochemical analysis and weight loss methods. It was found that the pH of the iron ore slurry increased with time and the corrosion behavior was influenced by the pH of the slurry. The corrosion rate of forged EN31 steel balls increased with the increase in time and pH of the slurry, whereas the corrosion rate of ADI balls depended on the austempering treatment. In general, the forged EN31 steel ball offered better corrosion resistance than ADIs during the early stages of exposure in the slurry (low pH values of the slurry), but at higher pH values of the slurry, the ADIs yielded better corrosion resistance than forged EN31 steel balls. The ADI austempered at higher temperatures showed better corrosion resistance than the ones austempered at lower temperatures.

    Author Information:

    Aithal, Pooja M.
    Department of Metallurgy, Amal Jyothi College of Engineering, Kanjirappally, Kerala

    Vijayan, Vijeesh
    Department of Mechanical Engineering, Sree Buddha College of Engineering, Pattoor, Alappuzha, Kerala

    Surendranathan, A. O.
    Department of Metallurgical and Materials Engineering, National Institute of Technology Karnataka, Surathkal, Srinivasnagar, Mangalore

    Udupa, K. R.
    Department of Metallurgical and Materials Engineering, National Institute of Technology Karnataka, Surathkal, Srinivasnagar, Mangalore

    Samuel, K. G.
    Department of Metallurgy, Amal Jyothi College of Engineering, Kanjirappally, Kerala


    Stock #: MPC20160070

    ISSN:2379-1365

    DOI: 10.1520/MPC20160070

    Author
    Title Corrosion Behavior of High and Low Temperature Austempered Ductile Iron (ADI) in Iron Ore Slurry
    Symposium ,
    Committee G01