Microabrasion corrosion

Figure 15.10 Electrochemical current noise obtained in microabrasion-corrosion test on as-cast CoCrCo (I.Og cm SiC) in 0.9% NaCI, PBS solutions, 25% and50% bovine serum (BS) at 37 °C. Reprinted from Ref [17]. Copyright (2005) with permission from Elsevier.

Sun, D., Wharton, J.A., Wood, R.J.K. et al. (2009) Microabrasion-corrosion of cast CoCrMo alloy in simulated body fluids. Tribology International, 42,99-110. 

Key words tribocorrosion, nanoparticles, nanocrystalline coatings, free corrosion potential, fretting corrosion, microabrasion corrosion. 

Microabrasion corrosion is the degradation of the material by the combined action of particle abrasion, mechanical load and corrosivity of the medimn (Gee et al, 2003 Staek and Mathew, 2003 Stack et al, 2005). Microabrasion corrosion is cotmnonly observed in orthopedic implants, particularly on hip joints (Sinnett-Jones et al, 2005 Bello et al, 2007 Sun et al, 2009a, 2009b Stack et al, 2010b). 

The results of this study indicate that nanosized AI2O3 particles could reduce the extent of material damage by microabrasion corrosion. In bovine serum, the formation of conglomerates traps the AI2O3 nanoparticles and provides a lubricating effect. 

Stack M. M., Rodling J., Mathew M. T., Jawan H., Huang W. et al. (2010b), Microabrasion-corrosion of a Co-Cr/UHMWPE couple in Ringer s solution An approach to construction of mechanism and synergism maps for application to bio-implants . Wear, 269, 376-82. (doi 10.1016/j.wear.2010.04.022)... 

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