Evidence for the presence of corrosive solution within corrosion products film in magnesium alloy ZK60

Article Nanoscience & Nanotechnology

Effect of strain rate and corrosion products on pre-exposure stress corrosion cracking in the ZK60 magnesium alloy

Evgeniy Merson et al.

Summary: The study found that increasing strain rate after pre-exposure treatment can enhance the ductility of the ZK60 alloy. Contrary to conventional beliefs, the mechanism of PESCC is associated with a corrosion products layer containing sealed corrosive media, rather than diffusible hydrogen.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2022)

添加到收藏夹

Article Materials Science, Multidisciplinary

Inhibiting stress corrosion cracking by removing corrosion products from the Mg-Zn-Zr alloy pre-exposed to corrosion solutions

Evgeniy Merson et al.

Summary: The study demonstrates that stress-corrosion cracking (SCC) in magnesium and its alloys during slow-strain rate tensile testing in air is related to hydrogen embrittlement and the corrosion product layer. However, the complete recovery of mechanical response and elimination of harmful embrittling features can be achieved by removing corrosion products from the surface of pre-exposed specimens, which challenges the common viewpoint that SCC mechanism is solely governed by diffusible hydrogen.

ACTA MATERIALIA (2021)

添加到收藏夹

Article Nanoscience & Nanotechnology

On the role of pre-exposure time and corrosion products in stress-corrosion cracking of ZK60 and AZ31 magnesium alloys

Evgeniy Merson et al.

Summary: The pre-exposure of magnesium alloys to corrosive media leads to embrittlement, primarily due to the combined effect of corrosion damage and brittle cracking mechanism. Deposition and increasing amount of corrosion products during pre-exposure play a key role in initiating brittle cracking, which can be fully inhibited by removing these corrosion products from the specimen surface. The irreversible loss in ductility and strength caused by corrosion damage becomes more pronounced with longer pre-exposure time. No evidence was found for the increasing concentration of diffusible hydrogen in magnesium alloys with prolonged pre-exposure.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2021)

添加到收藏夹

Article Nanoscience & Nanotechnology