Corrosion behavior of Mg wires for ureteral stent in artificial urine solution. (15th August 2021)

• Record Type: Journal Article
• Authors: Mei, Di; Wang, Cheng; Nienaber, Maria; Pacheco, Margarida; Barros, Alexandre; Neves, Sara; Reis, Rui L.; Zhu, Shijie; Bohlen, Jan; Letzig, Dietmar; Guan, Shaokang; Zheludkevich, Mikhail. L.; Lamaka, Sviatlana V.
• Is Part Of: Corrosion science. Volume 189(2021)
• Publication Date: 2021-08-15
• Subjects: Magnesium wires -- Ureteral stents -- Artificial urine solution -- Hydrogen evolution test -- Stratified structure; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.109567
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: Corrosion behavior of Mg wires in artificial urine solution is investigated. The corrosion products with stratified structure are observed. Artificial urine solution possesses a strong pH buffer effect. Hydrogen evolution test cannot be used in this artificial urine solution. Abstract: Ureteral stents are a relatively new potential application for biodegradable Mg alloys. In this study, the corrosion behavior of Mg-1Zn wires and pure Mg wires in artificial urine solution (AUS) is investigated. It is found that AUS possesses a strong pH buffer effect. Hydrogen evolution measurement cannot be used for Mg corrosion test in this AUS due to the oxygen scavenging effect of sulfite, which is a component of AUS. The corrosion products consist of two layers, MgNH4 PO4 ·6H2 O and Mg(OH)2 . The partially protective MgNH4 PO4 ·6H2 O slows down the Mg corrosion, but it indicates the encrustation risk on bare Mg-based ureteral stents.