Fretting corrosion damage of total hip prosthesis: Friction coefficient and damage rate constant approach

This paper analyzes friction coefficient evolution between materials related to total hip prosthesis. Fretting corrosion tests were conducted with stainless steel and poly(methyl methacrylate) interacting surfaces. In the course of fretting corrosion tests, the Coulomb friction coefficient is determined as a function of the number of cycles. It was found that the friction coefficient growth rate can be expressed as a power-law function. The influences of ionic strength, applied potential, pH, and albumin content on fretting corrosion were then investigated on the basis of the evolution of the friction coefficient. Finally, we identify the damage rate constant as being relevant for linking the mechanical and chemical parameters in the evolution of damage.

Without albumin and at open circuit potential; 0.1 M: threshold concentration under fretting corrosion conditions.Figure optionsDownload high-quality image (199 K)Download as PowerPoint slideHighlights
► Friction coefficient growth rate can be expressed as a power-law function, in case of fretting corrosion.
► The damage rate constant allows describing influences of ionic strength, applied potential, pH and albumin content.
► Friction coefficient of −0.4 V/SCE is higher than that of open circuit potential (OCP).
► Addition of albumin increases friction coefficient but it decreases wear rate.