Corrosion Performance of Bioglass-Coated AZ31 Alloy under Static and Accelerated Flow Conditions

The bodily fluids in the human body have different flow rates. The corrosive effects of these fluids vary depending on several factors. Static corrosion experiments cannot effectively provide as much information as required to represent dynamic corrosion conditions. The purpose of this study was to conduct real-time electrochemical experiments by testing different environments (dynamic environments) in addition to previously researched environments (static environments). AZ31 magnesium alloy was coated with chitosan/63 s bioglass coating. Next, the biocorrosion behaviors of untreated and coated specimens were compared in static and dynamic flow environments, and the effects of the coating on the corrosion behaviors of the AZ31 magnesium alloy were discussed. According to the experimental results, the best corrosion resistance values were achieved with the specimens with the coating containing 0.8 g bioglass. The results revealed the importance of coating and design in increasing the resistance of the Mg alloy exposed to a flow environment against corrosion. In other words, in the determination of the mode of corrosion mechanisms and corrosion product formation, the coating applied onto the specimen surface, the composition of the ambient medium, the design of the Mg alloy, and the dynamics of the fluid played significant roles.

Journal

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE

Year

2023

Volume

32

Issue

20

Pages

9182-9197

ISSN

1059-9495

eISSN

1544-1024

DOI

10.1007/s11665-023-08647-1

WoS UID

WOS:001063534200002