Advances in Mg corrosion and research suggestions

Atrens, Andrej; Song, Guang‐Ling; Cao, Fuyong; Shi, Zhiming; Bowen, Patrick K.

doi:10.1016/j.jma.2013.09.003

Cited by 426 publications

(229 citation statements)

References 54 publications

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“…The aim of this paper was to assess the implication of a reanalysis of our recent EIS data for Mg corrosion [3,6,10,11], based on the suggestions of King et al [1], and in particular if there needed to be any revision of (i) the conclusions in those papers, or (ii) the conclusions regarding the Mg corrosion mechanism made in our recent review [12].…”

Section: If It Is Assumed That the Anodic Partial Reaction During Mgmentioning

confidence: 99%

Low apparent valence of Mg during corrosion

et al. 2014

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Our recent data on Mg corrosion has been reanalysed because of the recent criticism that our previous data analysis was inadequate. Re-analysis leads to similar conclusions as previously. The apparent valence of Mg during corrosion was in each case less than 2.0, and in many cases less than 1.0. Moreover, these values were probably over-estimates. The low values were consistent with the evolving hydrogen gas acting as an insulator, so that the corrosion of parts of the specimen could occur isolated from the electrochemical measurement system.

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Section: If It Is Assumed That the Anodic Partial Reaction During Mgmentioning

confidence: 99%

Low apparent valence of Mg during corrosion

et al. 2014

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“…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.…”

Section: Magnesium Corrosion Assessmentmentioning

confidence: 99%

“…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.…”

Section: Magnesium Corrosion Assessmentmentioning

confidence: 99%

“…As shown in Equation (1), Mg corrodes to produce Mg(OH) 2 and in NaCl solutions the pH typically rises to~10.3 within hours of immersion due to the low solubility of Mg(OH) 2 [55]. While unbuffered SBFs can reach this high pH value [104], they also have a tendency to plateau at a somewhat lower pH depending on experimental conditions [90,105].…”

Section: Ph and Buffer Systemsmentioning

confidence: 99%

“…Mg corrosion in an unbuffered solution leads to an increase in solution pH. In a simple NaCl solution the pH increases to~10.3 after several hours due to the low solubility of Mg(OH) 2 ; the physical chemistry by which the pH is controlled by the low solubility of Mg(OH) 2 is fully described by Atrens et al [55]. Xin et al [59] considered the influence of a range of ions, including HCO 3 − , on the corrosion of AZ91.…”

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

2017

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The factors that influence magnesium (Mg) corrosion in vitro are systematically evaluated from a review of the relevant literature. We analysed the influence of the following factors on Mg biocorrosion in vitro: (i) inorganic ions, including both anions and cations, (ii) organic components such as proteins, amino acids and vitamins, and (iii) experimental parameters such as temperature, pH, buffer system and flow rate. Considerations and recommendations towards a standardised approach to in vitro biocorrosion testing are given. Several potential simulated body fluids are recommended. Implementing a standardised approach to experimental parameters has the potential to significantly reduce variability between in vitro biocorrosion tests, and to help build towards a methodology that accurately and consistently mimics in vivo corrosion. However, there are also knowledge gaps with regard to how best to characterise the in vivo environment and corrosion mechanism. The assumption that blood plasma is the correct bodily fluid upon which to base in vitro methodologies is examined, and factors that influence the corrosion mechanism in vivo, such as specimen encapsulation, bear consideration for further studies.

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