Effects of shape and surface modification on the corrosion of nitinol alloy wires exposed to saline solutions

F. Placido, A. McLean, A. A. Ogwu, W. Ademosu

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The corrosion behaviour of Nitinol wire that was chemically etched and mechanically polished was studied in a corrosive 0.9 % saline solution. The electrochemical corrosion tests conducted on the as-received straight and curved wires of nitinol included open circuit potential (OCP) measurement, polarisation resistance and Tafel plots. The chemically etched looped wires exhibited the highest recorded corrosion potential, Ecorr and the lowest values of corrosion current, icorr. The results of the OCP measurements and polarisation resistance, combined with scanning electron microscopy (SEM) indicated the presence of a protective passive corrosion-resistant film on the chemically etched wires. The aim of the current investigation is to study the corrosion and pitting resistance behaviour of nitinol wire with different surface finishes.

Original languageEnglish
Title of host publicationSurgical Tools and Medical Devices, Second Edition
PublisherSpringer International Publishing
Pages93-104
Number of pages12
ISBN (Electronic)9783319334899
ISBN (Print)9783319334875
DOIs
Publication statusPublished - May 22 2016

All Science Journal Classification (ASJC) codes

  • General Engineering

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