Liang Wu, Xiao-Bo Chen, Yingwei Song
Sep 15, 2022
Citations
0
Influential Citations
0
Citations
Quality indicators
Journal
Journal name not available for this finding
Abstract
As green metal engineering materials in the 21st century, magnesium (Mg) and its alloys are abundant in nature and exhibit high commercial value and diverse application prospects in structural engineering, such as automotives, electronic communications, aerospace and defense industry. However, Mg alloys are highly active in terms of chemistry and prone to corrosion, which is one of the key bottlenecks in terms of large scale engineering services. This Research Topic was compiled aiming to highlight the state-of-the art research in relation to corrosion and protection of Mg alloys and provide guidance to the future development of Mg alloys towards robust and sustained corrosion resistance through nine articles combining critical reviews, scientific explorations, and perspectives. Thermal control over oxidation is a common and conductive approach for tackling corrosion challenges of Mg-based materials for aerospace services. Jiang et al. calculated the Pilling-Bedworth ratio of oxides preferentially formed from the precipitated phases in Mg alloys. Results show that enrichment in Y2O3 in the composite oxidation film leads to improved corrosion resistance of Mg-Y samples. Wen et al. explored corrosion behavior of Mg alloy LA103Z with a thermally controlled oxide film in 3.5% NaCl solution. It is evident that corrosion of the Mg-Li alloy with a chemical oxidation film is initiated in pitting format, expands in depth in the early stage, forms corrosion holes, and then gradually develops into river-like morphology. In the last stage, the increasing corrosion products progressively cover the entire sample surface, which reduces the corrosion rate of the Mg alloy. Combinations with corrosion inhibiting chemicals (e.g., graphene oxide) have been applied to Mg alloy surfaces. Zhang et al. reported a (3-aminopropyl)-triethoxysilanemodified graphene oxide (GO) composite film uponMg alloy AZ31 substrates. Due to the high barrier properties of layered GO, the silane-GO coatings provide effective protection to Mg alloy substrate and reduce surface defects in the GO film that occur during silane modification. In addition, corrosion products between the outer silane-GO film and Mg OPEN ACCESS