Saturday, July 16, 2011

India - Corrosion Research - NMRL: Effect of the reinforced boron carbide particulate content of AA6061 alloy on formation of the passive film in seawater

V.A. Katkar, G. Gunasekaran, A.G. Rao, P.M. Koli, Effect of the reinforced boron carbide particulate content of AA6061 alloy on formation of the passive film in seawater, Corrosion Science, Volume 53, Issue 9, September 2011, Pages 2700-2712, ISSN 0010-938X, DOI: 10.1016/j.corsci.2011.04.023.

Affiliation:   Naval Materials Research Laboratory, Shil Badlapur Road, Addl. Ambernath (E) Dist., Thane 421506, India



The effect of boron carbide (B4C) reinforcement on the corrosion of AA6061 alloy was studied by investigating passive films formed in seawater. The higher passive current and its potential-dependence for these composites indicated formation of porous passive film. Electrochemical impedance spectroscopy (EIS) graph suggests that the alloy surface is partly or totally active. The formed passive film is n-type semiconductor junction in nature. The difference between corrosion potential (Ecorr) and potential at zero charge (PZC) suggests that the chloride ions responsible for film breakdown exist within the passive film. A suitable mechanism is proposed for the passive film breakdown.

Keywords: A. Metal matrix composites; B. EIS; B. Polarisation; B. SEM; B. AFM; C. Passive films

1 comment:

  1. Dear Sir,
    Centre of Advanced Study in Marine Biology and Department of Civil and Structural Engineering, Faculty of Engineering and Technology, Annamalai University in collaboration with National Corrosion Council of India (NCCI) and Central Electrochemical Research Institute (CECRI), Karaikudi is organizing a Workshop on Marine Corrosion and Surface Engineering at CAS in Marine Biology, Parangipettai during 24th – 26th November 2011.

    This workshop will discuss all aspects of corrosion problems in various industries and the recent advances in marine corrosion science, engineering, antifouling coating and technologies related to corrosion protection measures. Kindly visit for further details. The last date for submission of Reg. form is 22.10.2011.

    Thanking you and with best regards
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