Review of Recent Developments in the Field of Magnesium Corrosion

Abstract

This paper provides a review of recent developments in the field of Mg corrosion and puts those into context. This includes considerations of corrosion manifestations, material influences, surface treatment, anodization, coatings, inhibition, biodegradable medical applications, stress corrosion cracking, flammability, corrosion mechanisms for HP Mg, critical evaluation of corrosion mechanisms, and concluding remarks. There has been much research recently, and much research continues in this area. This is expected to produce significantly better, more-corrosion-resistant Mg alloys.

In vivo and in vitro degradation comparison of pure Mg, Mg-10Gd and Mg-2Ag: a short term study

“…The H 2 evolution gave lower DR compared to the ML method. This difference can be explained by the particle undermining model (Song and Atrens, 1999), and perhaps the dissolution of hydrogen in the Mg sample (Atrens et al, 2015;Remennik et al, 2011;Zainal Abidin et al, 2013).…”

“…(iii) Mg metal can store significant amounts of hydrogen (Nogita et al, 2009). Many authors use the dissolution of hydrogen in the Mg sample to explain the difference between the DRs calculated by hydrogen evolution and by ML (Atrens et al, 2015;Remennik et al, 2011;Zainal Abidin et al, 2013). (iv) Mg-RE alloys, e.g.…”

Building towards a standardised approach to biocorrosion studies: a review of factors influencing Mg corrosion in vitro pertinent to in vivo corrosion

“…Corrosion of Mg alloys is typically faster than the corrosion of high-purity Mg in simple chloride solutions, because the second phase in the Mg alloy causes microgalvanic acceleration of the corrosion of the alpha-Mg matrix [22,[54][55][56]. This micro-galvanic corrosion acceleration typically occurs preferentially next to the second phase, and is often wrongly characterised as pitting corrosion.…”

“…A detailed description of each technique can be found in any one of several good reviews [54,55,58]. Each technique has strengths and limitations.…”

“…However, in more complex solutions, such as those employed in biocorrosion testing, more varied corrosion products can form [21]. These additional corrosion products can form surface films, which provide more substantial protection, and slow the corrosion rate of the sample [21,54].…”