Long-term corrosion kinetics and mechanism of magnesium alloy AZ31 exposed to a dry tropical desert environment. (February 2020)

• Record Type: Journal Article
• Authors: Man, Cheng; Dong, Chaofang; Wang, Li; Kong, Decheng; Li, Xiaogang
• Is Part Of: Corrosion science. Volume 163(2020)
• Publication Date: 2020-02
• Subjects: Magnesium -- XPS -- Atmosphere corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2019.108274
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Corrosion rate of AZ31 in a dry tropical desert environment raised after 6-month. The corrosion behavior is mainly influenced by the diurnal temperature difference. The condensation had a decisive effect on corrosion of AZ31 in the exposure site. Abstract: The long-term corrosion behavior of magnesium alloy AZ31 exposed to a dry tropical desert environment was investigated. The results of field-exposure test revealed that after an initial rapid period, the corrosion rate slowed down as the corrosion product layer protected the surface until cracks formed, allowing for the corrosion rate to accelerate. An accelerated corrosion test confirmed that the condensation caused by the large diurnal temperature difference, which could support the occurrence of electrochemical reactions, had a decisive effect on the corrosion of alloy AZ31 at the exposure site.