Evaluation of corrosion resistance of Co-Cr alloy in NaCl solution

Ryouji Suzuki, Kazuhiko Noda, Yusuke Tsutsumi, Takao Hanawa

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Co-Cr alloys, which have an excellent strength and wear resistance, are used as biomaterials in applications such as artificial joints. In this study, the corrosion resistance of Co-Cr alloy was investigated by electrochemical measurements. Type 316 Stainless steel, Ti, Co, and Cr were used as comparison materials. According to the polarization curves obtained in this study, the Co-Cr alloy maintained a passive state over a wide potential region, same as that observed for Cr. However, localized corrosion of type 316 stainless steel occurred to in the passive region of Co-Cr alloy. The passive current density of Co-Cr alloy was constant independent of NaCl concentration. The passive film on Co-Cr alloy, which has high localized corrosion resistance, was stable against chloride ions of high concentration. Open circuit potential of the Co-Cr alloy changing with immersion time appeared to be similar to that of Cr. As a result, the reactivity of Co-Cr alloy was considered to be dominated by Cr. Therefore, the Co-Cr alloy is expected to be safely used as biomaterials.

Original languageEnglish
Title of host publicationECS Transactions
Pages1-5
Number of pages5
Volume50
Edition50
DOIs
Publication statusPublished - 2012

Fingerprint

Corrosion resistance
Biomaterials
Stainless steel
Wear resistance
Current density
Polarization
Corrosion
Networks (circuits)
Ions

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Suzuki, R., Noda, K., Tsutsumi, Y., & Hanawa, T. (2012). Evaluation of corrosion resistance of Co-Cr alloy in NaCl solution. In ECS Transactions (50 ed., Vol. 50, pp. 1-5) https://doi.org/10.1149/05050.0001ecst

Evaluation of corrosion resistance of Co-Cr alloy in NaCl solution. / Suzuki, Ryouji; Noda, Kazuhiko; Tsutsumi, Yusuke; Hanawa, Takao.

ECS Transactions. Vol. 50 50. ed. 2012. p. 1-5.

Research output: Chapter in Book/Report/Conference proceedingChapter

Suzuki, R, Noda, K, Tsutsumi, Y & Hanawa, T 2012, Evaluation of corrosion resistance of Co-Cr alloy in NaCl solution. in ECS Transactions. 50 edn, vol. 50, pp. 1-5. https://doi.org/10.1149/05050.0001ecst
Suzuki R, Noda K, Tsutsumi Y, Hanawa T. Evaluation of corrosion resistance of Co-Cr alloy in NaCl solution. In ECS Transactions. 50 ed. Vol. 50. 2012. p. 1-5 https://doi.org/10.1149/05050.0001ecst
Suzuki, Ryouji ; Noda, Kazuhiko ; Tsutsumi, Yusuke ; Hanawa, Takao. / Evaluation of corrosion resistance of Co-Cr alloy in NaCl solution. ECS Transactions. Vol. 50 50. ed. 2012. pp. 1-5
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