Corrosion on polished and laser-textured surfaces of an Fe-Mn biodegradable alloy

Hočevar, Matej (author), Donik, Črtomir (author), Paulin, Irena (author), Kocijan, Aleksandra (author), Tehovnik, Franc (author), Burja, Jaka (author), Gregorčič, Peter (author), Godec, Matjaž (author)

Fe-based biodegradable alloys such as Fe-Mn are interesting for biodegradable implants; however, their corrosion rate for such applications is too low. Here, nanosecond-laser surface texturing is applied as a successful surface treatment for increasing the degradation rate of an Fe-Mn alloy. Laser texturing increases the surface area by increasing the surface porosity and generating a super-hydrophilic surface. Electrochemistry tests revealed that the laser-textured samples have a higher corrosion rate than a polished sample, thus enhancing the biodegradability of the Fe-Mn alloy. EDS analyses revealed a significantly higher content of Mn on the surface in the oxidized layer compared to the bulk Fe-Mn composition, which is one of the reasons for the increased corrosion rate. This work demonstrates the potential of laser-treated surfaces of biodegradable metals for biomedical applications.

• Language: English
• Keywords: Fe-Mn alloy, laser texturing, corrosion, biodegradable, EDS analyses
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2017
• Number of pages: Str. 1037-1041
• Numbering: Letn. 51, št. 6
• PID: 20.500.12556/RUL-99022
• UDC: 620.1/.2(045)
• ISSN on article: 1580-2949
• DOI: 10.17222/mit.2017.140
• COBISS.SI-ID: 15804187
• Publication date in RUL: 14.02.2018

Record is a part of a journal

• Title: Materiali in tehnologije
• Shortened title: Mater. tehnol.
• Publisher: Inštitut za kovinske materiale in tehnologije
• ISSN: 1580-2949
• COBISS.SI-ID: 106193664

Secondary language

• Language: Slovenian
• Title: Primerjava korozijskih lastnosti polirane in lasersko teksturirane površine biorazgradljive zlitine Fe-Mn

Abstract

Biološko razgradljive zlitine, kot so na primer Fe-Mn zlitine, so zanimive za uporabo v obliki biološko razgradljivih implantantov, vendar je njihova hitrost korozije za ciljne aplikacije še vedno prenizka. Lasersko teksturiranje površine predstavlja uspešno površinsko obdelavo za povečanje hitrosti razgradnje Fe-Mn zlitine. Obdelava površine z laserjem poveča delež izpostavljene površine na račun večje poroznosti, obenem pa je novonastala površina superhidrofilna. Elektrokemijski testi so pokazali, da imajo vzorci, obdelani z laserjem, večjo stopnjo korozije v primerjavi s poliranimi vzorci, s čimer se poveča biorazgradljivost zlitine Fe-Mn. EDS analiza je pokazala povečano vsebnost Mn na površini v oksidirani plasti v primerjavi s kemijsko sestavo osnovnega materiala Fe-Mn, kar predstavlja eno od razlag za povečanje hitrosti korozije. Raziskava dokazuje potencial laserske obdelave površine biološko razgradljivih kovin za biomedicinske aplikacije.

• Keywords: zlitina Fe-Mn, lasersko teksturiranje, korozija, biorazgradljivost, EDS analiza

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0392
• Name: Optodinamika

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0132
• Name: Fizika in kemija površin kovinskih materialov