Mechanisms of laminar flow controlled in vitro corrosion of a biodegradable Fe-Mn-C steel
Source abstract
Abstract
The in vitro corrosion of Fe-30Mn-1C in a Ca-modified Hanks’ balanced salt solution was investigated for biodegradable cardiovascular stents with a rotating disc electrode. A blood flow-related approach was developed to adjust laminar flow conditions. Electrochemical monitoring revealed that intermediate flow caused maximum corrosion, while static and high flow conditions led to minimal corrosion. Surface analysis indicated the formation of a non-crystalline, nanoscopic degradation layer, whereby thickness, porosity and layer-disrupting defects are strongly affected by flow conditions. The interplay between laminar flow and the degradation layer was crucial for the steel degradation and discussed by employing a hydrodynamics-based corrosion scheme. • Study of laminar flow conditions with a rotating disc electrode setup • Hydrodynamic characteristics of blood flow-related wall shear stress are established • Rapid corrosion of Fe-Mn-C in Ca-modified Hank’s BSS at intermediate flow (550 RPM) • Mass transfer through a porous layer is inhibiting corrosion at high rotation rate • Evidence of mass transfer instead of wall shear stress effect due to laminar flow
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Magnesium Alloys: Properties and Applications · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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