Influence of Proteins and Cells on Corrosion of Mg
The presentation will discuss some recent findings on interactions between Mg, proteins (mainly bovine serum albumin), and cells. Protein effects on corrosion were studied by electrochemical techniques on commercially-pure Mg and the Mg alloy AZ91. Surface analysis by XPS and ToF-SIMS indicate that proteins indeed adsorb on Mg surfaces and can inhibit corrosion but the effects are time- and material-dependent. In addition, the presence of proteins in solution change the composition of corrosion layers on the surface. Impedance spectroscopy investigations combined with in vitro cell culturing on Mg demonstrate a significant decrease of dissolution rate after certain time of cell growth.