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Influence of the activation time of magnesium surfaces on the concentration of active hydroxyl groups and corrosion resistance.
Arrieta Payares, Lily Margareth; Gutierrez Pua, Lizeth Del Carmen; Rincon Montenegro, Juan Carlos; Fonseca Reyes, Ana; Paredes Mendez, Virginia Nathaly.
Afiliação
  • Arrieta Payares LM; Mechanical Engineering Department, Universidad del Norte, Km5 Vía Puerto Colombia, Barranquilla, 080005, Colombia.
  • Gutierrez Pua LDC; Mechanical Engineering Department, Universidad del Norte, Km5 Vía Puerto Colombia, Barranquilla, 080005, Colombia.
  • Rincon Montenegro JC; Mechanical Engineering Department, Universidad del Norte, Km5 Vía Puerto Colombia, Barranquilla, 080005, Colombia.
  • Fonseca Reyes A; Mechanical Engineering Department, Universidad del Norte, Km5 Vía Puerto Colombia, Barranquilla, 080005, Colombia.
  • Paredes Mendez VN; Mechanical Engineering Department, Universidad del Norte, Km5 Vía Puerto Colombia, Barranquilla, 080005, Colombia.
Heliyon ; 10(15): e34772, 2024 Aug 15.
Article em En | MEDLINE | ID: mdl-39144980
ABSTRACT
Magnesium alloys have been extensively studied as degradable biomaterials for clinical applications due to their biocompatibility and mechanical properties. However, their poor corrosion resistance can lead to issues such as osteolysis and the release of gaseous hydrogen. This study investigated the influence of the activation time of magnesium surfaces in a sodium hydroxide (NaOH) solution on the concentration of active hydroxyl groups and corrosion resistance. The results indicated that immersion time significantly influences the formation of a corrosion-resistant film and the distribution of surface hydroxyl groups. Specifically, specimens treated for 7.5 h exhibited the highest concentration of hydroxyl groups and the most uniform oxide film distribution. Electrochemical tests demonstrated capacitive behavior and passive surface formation for all evaluated times, with the 7.5-h immersion in NaOH yielding superior corrosion resistance, lower current density, and a more efficient and thicker protective film. SEM and EDS analyses confirmed increased formation of Mg(OH)2 for samples treated for 5 and 7.5 h, while a 10-h treatment resulted in a brittle, porous layer prone to degradation. Statistical analysis using ANOVA and Fisher's LSD test corroborated these findings. The optimal 7.5-h alkali treatment enhanced magnesium's corrosion resistance and surface properties, making it a promising candidate for orthopedic implants. However, further studies are necessary to assess biocompatibility and physiological responses before clinical implementation.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article