Corrosion electrochemistry of magnesium (Mg) and its alloys

Influence of casting porosity on the corrosion behaviour of Mg0.1Si

“…Song and co-workers [1,2,6,8,30,45] have proposed that the experimental observations are consistent with a corrosion mechanism involving the uni-positive ion Mg + as an extremely-reactive intermediate in the corrosion sequence between metallic Mg and the ion, Mg 2+ , that is stable in aqueous solution. A perceived shortcoming of this approach is the lack of any observation of Mg + ions in aqueous solutions [2].…”

Possible dissolution pathways participating in the Mg corrosion reaction

“…(1) to (4) was considered [1][2][3][4][5]. This is compatible with the reaction sequences discussed here; it can be matched by the electrochemical reaction sequence as provided by Eqs.…”

“…Atrens and co-workers [1][2][3][4][5] has the following two key aspects: (i) that the anodic and cathodic partial reactions occur preferentially at breaks in a partly protective film, and (ii)…”

“…[1][2][3][4]9]. This implies that the reaction proceeds by a combination of both dissolution and electrochemical processes.…”

Laser surface structuring affects polymer deposition, coating homogeneity, and degradation rate of Mg alloys

“…Furthermore, the porous nature of LbL coating is a relevant parameter affecting Mg degradation rate: in fact Conceicao et al [20] reported that a porous poly(ether imide) coating over a metallic substrate is responsible for a lower degradation rate than a denser one, because in the former case hydrogen is released without excessively damaging the coating and the interface. In addition to role of the coating stability, the degradation process of the Mg alloy is also affected by solution composition, surface morphology and chemistry as well as microstructure [6,21,22]. In particular, the polished samples exhibit lower average roughness though a porous surface (Fig.…”