Corrosion behavior of magnesium alloys and protection techniques

Song, Guang‐Ling

doi:10.1533/9781845699451.1.3

Cited by 15 publications

(16 citation statements)

References 89 publications

(80 reference statements)

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“…The hydrogen evolution reaction at the cathode is the main reason for the corrosion of the magnesium alloys. Thus, the hydrogen evolution rate is proportional to the corrosion rate [57][58][59][60][61]. The hydrogen evolution process also shows the same result as the aforementioned reaction ( Figure 10).…”

Section: Influence Of the Formation Time On The Anti-corrosion Propersupporting

confidence: 61%

Formation Process of an LDHs Coating on Magnesium Alloy by a CO2 Pressurization Method

et al. 2019

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The formation process of LDHs (layered double hydroxides) coating on magnesium alloy by the CO2 pressurization method was studied. The micro-structure was observed by OM, SEM and GAXRD. The weighted gain curve, apparent activation energy, and CO2 solubility curve were all calculated by equations. The potentiodynamic polarization curve, hydrogen evolution data, and immersion were analyzed by an electrochemical method. The results show that the LDHs coating was formed layer-by-layer. The formation positions were initially on the α-Mg phase, and then on the β-Mg17Al12 phase. It was found to be the most compact after 30 min. The LDHs coating began to appear to have severe cracks and holes over time. The formation process of the LDHs coating can be divided into three stages: a rapid growth stage (0–10 min), slow growth stage (10–20 min), and periodic growth stage (30 min, 1 h). The apparent activation energies in each of the three stages are 21.78, 31.86 and 34.92 kJ mol−1, respectively. The LDHs coating has a compact micro-structure and better anti-corrosion at a pressure of 3 MPa, a temperature of 50 °C and a time of 30 min. The CO2 pressurization promotes a formation reaction rate and achieves a high formation efficiency and good formation stability under the condition of zero pollution.

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Section: Influence Of the Formation Time On The Anti-corrosion Propersupporting

confidence: 61%

Formation Process of an LDHs Coating on Magnesium Alloy by a CO2 Pressurization Method

et al. 2019

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“…Furthermore, the noble elements are much heavier than Mg, so that only a small amount could be added and still retain the low-density advantage of Mg. Therefore, it is not feasible to develop a low-density Mg alloy [66] through alloying with noble elements.…”

Section: The Possibility Of Passivitymentioning

confidence: 99%

Corrosion and passivation of magnesium alloys

2016

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This paper reviews and discusses the possibility of the production of a passive magnesium (Mg) alloy through metallurgical approaches, such as purification, alloying, heat-treatment, mechanical processing and non-equilibrium sputter deposition. High-purity Mg and all existing Mg alloys produced by traditional methods are found to be active in a chloride containing solution. Passivity in a Mg alloy might be produced through a non-equilibrium technique with a sufficiently-high concentration of a strong passivating element supersaturated in the matrix phase. This paper clarifies important concepts regarding the passivity of Mg alloys, and suggests possible approaches to develop a passive, corrosion-resistant Mg alloy.

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“…Castellani i suradnici su, na životinjskom modelu, dokazali da taj element, za razliku od titanija, postiže veću dodirnu površinu na sučelju implantat -kost i bolju mehaničku čvrstoću bez pojave sustavnoga upalnog odgovora (24). Ipak, zbog svojih biodegradabilnih svojstava, velike kemijske reaktivnosti i nepovoljnoga korozijskog ponašanja, čisti magnezij se, kao dentalni biomaterijal, može koristiti samo u kombinaciji s drugim kovinskim biomaterijalima (25).…”

Section: Uvodunclassified

“…Castellani et al, in an animal model, showed that Mg obtained greater contact surface of the implant-bone interface and better mechanical strength without the occurrence of systemic inflammatory response in contrast to titanium (24). However, due to its biodegradable properties, high chemical reactivity and unfavorable corrosion behavior, pure Mg as a dental biomaterial can be used only in combination with other metallic biomaterials (25).…”

Section: Uvodmentioning

confidence: 99%