Influence of Mn on the corrosion behavior of CuAlMn alloy in NaCl solution

Scientific paper - Original scientific paper

• Author: Senka Gudić
• Author: Blanka Rakuljić
• Author: Ladislav Vrsalović
• Author: Milan Bizjak
• Author: Ivana Ivanić
• Author: Stjepan Kožuh
• Author: Mirko Gojić
• Editor: Natalija Dolić
• Editor: Zdenka Zovko Brodarac
• Editor: Anita Begić Hadžipašić
• Author's institution: University of Split; Faculty of Chemistry and Technology
• Author's institution: University of Zagreb; Faculty of Metallurgy
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract (english)

The corrosion behavior of different CuAlMn shape memory alloys (Cu-12%Al-4%Mn, Cu-12.3%Al-5.2%-Mn and Cu-12%Al-6%Mn) in 0.9% NaCl solution at pH = 7.4 and T = 37°C was investigated using open circuit potential measurements, polarization and electrochemical impedance spectroscopy methods. It has been found that the corrosion resistance of the tested samples at open circuit potential increases with increasing Mn content in the alloy, i.e. growing in the order of: Cu-12%Al-4% Mn < Cu-12.3%Al-5.2%Mn < Cu-12%Al-6% Mn. Namely, the corrosion current decreases in same order, while the polarization resistance and the resistance, thickness and compactness of the surface oxide layer increase. However, at high anodic potentials (E > 0.1 V), the corrosion rate increases with Mn content in the alloy, and light microscopy investigations reveal pits on the surface of Cu-12.3%Al-5.2%-Mn and Cu-12%Al-6%Mn alloys, while Cu-12%Al-4%Mn surface is almost clear of any corrosion damage.

• Keywords (english): shape memory alloys; CuAlMn alloy; corrosion; polarization; electrochemical methods
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Publication title: Proceedings book 18th International Foundryman Conference
• Numbering: pp. 227-236
• ISBN: 978-953-7082-34-5
• URN:NBN: urn:nbn:hr:115:656395
• Publication: 2019
• Project: Number: IP-2014-09-3405; Title (croatian): Dizajniranje mikrostrukture i funkcionalnih svojstava legura s prisjetljivosti oblika na bazi bakra; Acronym: DMFP-CuSMA; Leader: Mirko Gojić; Jurisdiction: Croatia; Funding stream: IP
• Conference: Title: 18th International Foundryman Conference, Coexistence of material science and sustainable technology in economic growth; Location: Sisak, Croatia; Start date: 2019-05-15; End date: 2019-05-17; Assembly type: Lecture
• Document URL: http://bib.irb.hr/1001850
• Type of resource: Text
• Publisher: Sveučilište u Zagrebu Metalurški fakultet
• Publishing place: Sisak
• Access conditions: Open access
• Created on: 2019-07-02 11:01:35