Mn Bharath

Glucose contents of simulated body fluid may both inhibit and accelerate corrosion of magnesium alloys. The nature of the influence may depend on the type and content of glucose and the characteristics of simulated body fluid. Corrosion of a Mg-Zn-Zr alloy (i.e., ZK60) in modified-simulated body fluid (m-SBF) was studied with and without added glucose, employing potentiodynamic polarisation (PDP) and electrochemical impedance spectroscopy (EIS). The morphology and chemical characteristics of the corrosion product layer were investigated by scanning electron microscopy (SEM), grazing-incidence X-ray diffraction (GI-XRD), and X-ray photoelectron spectroscopy (XPS), which enabled a mechanistic understanding of the role of glucose addition in corrosion of the alloy. Principal component analysis (PCA) through a Bayesian inference pipeline was applied to the full experimental dataset to provide a statistically rigorous and quantitative assessment of the electrochemical data beyond conventional mean-comparison. This was meant not to replace the mechanistic interpretation derived from PDP, EIS, and surface characterization, but to quantify pattern structure in the raw electrochemical data and to express uncertainty in the condition-level electrochemical summaries in probabilistic terms.