Comparing physiologically relevant corrosion performances of Mg AZ31 alloy protected by ALD and sputter coated TiO2

Peron, Mirco; Afif, Abdulla Bin; Dadlani, Anup L.; Berto, Filippo; Torgersen, Jan

doi:10.1016/j.surfcoat.2020.125922

Cited by 31 publications

(14 citation statements)

References 52 publications

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“…Hence, the i corr of the steel wire can be determined from the intersection (in Figure 7) of the anodic and cathodic Tafel lines of the two polarization curve branches. The corrosion rate of the bridge wire can be expressed as Equation 3 according to the Faraday's law 29

v_{corr} = \frac{M_{Fe} i_{corr}}{italicπρ {dL}_{c} italicFn},

where M Fe is the molar mass of iron, being 56 × 10 −3 kg/mol; ρ is the density of iron, being 7.85 × 10 3 kg/m 3 ; d is the diameter of wire without coating; L c is the length of the electrochemical corrosion region, which is equal to 50 mm; F is the Faraday's constant, equal to 96,465 C/mol; n is the number of electrons transferred per ion, being 2 for iron.…”

Section: Resultsmentioning

confidence: 99%

Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

Liu

Guo

et al. 2020

Fatigue Fract Eng Mat Struct

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In-service bridge wires often fail prior to the design life subjected to alternating stresses and environmental erosion. In this paper, a novel corrosion fatigue test device, integrating fatigue testing machine and electrochemical accelerated corrosion assemblies, was developed to characterize the corrosion fatigue and electrochemical behaviour of the wires. Using the developed device, corrosion fatigue tests of corroded bridge wires under different corrosion and loading conditions were conducted. Electrochemical characteristics, corrosion fatigue behaviour, failure mechanism, and so forth were investigated according to electrochemical measurements, fracture morphologies and the lifetime of wires. Results evidence the synchronization of corrosion and fatigue and show the accelerated corrosion due to static and fatigue stresses. Additionally, cracking and fracture induced by multiple crack initiation was dominant in corrosion fatigue of corroded wires, and the coexistence of multiple corrosion pits decreased the lifetime significantly.

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v_{corr} = \frac{M_{Fe} i_{corr}}{italicπρ {dL}_{c} italicFn},

Section: Resultsmentioning

confidence: 99%

Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

Liu

Guo

et al. 2020

Fatigue Fract Eng Mat Struct

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“…Among them, the thin layer prepared by the atomic layer deposition (ALD) method has advantages such as high conformality, uniformity, and a thickness controllable, it especially suitable for complex 3D substrates. 13,14 In addition, micro-arc oxidation (MAO) treatment is recently recognized as the most promising method for the surface treatment of magnesium alloys. Biologically active elements such as Ca and P after MAO treatment are integrated into the oxide film layer formed on the surface of material, thus significantly improving the biological activity of implant surface.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the surface treatment becomes an effective method to controlling the corrosion rate of magnesium alloy. Among them, the thin layer prepared by the atomic layer deposition (ALD) method has advantages such as high conformality, uniformity, and a thickness controllable, it especially suitable for complex 3D substrates 13,14 . In addition, micro‐arc oxidation (MAO) treatment is recently recognized as the most promising method for the surface treatment of magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

Fatigue behavior after pre‐corroded in a simulated body fluid for ZK60 magnesium alloy prepared by micro‐arc oxidation

Xiong

Yang

2021

Fatigue Fract Eng Mat Struct

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A bio‐ceramic coating was prepared on the surface of ZK60 magnesium alloys by micro‐arc oxidation (MAO) method. The substrate (BM) and coated (MAO) specimens were pre‐corroded in a simulated body fluid (SBF) for 12 h. Strain‐controlled and stress‐controlled loading modes were used to conduct fatigue tests for the specimens with non‐corroded and pre‐corroded, and the cyclic deformation behavior of different specimens was studied. The fatigue life of pre‐corroded MAO specimen is higher than that of pre‐corroded BM specimen. The mechanism of cyclic deformation under different loading conditions is related to twinning and slip. For the same specimens, the higher the absolute value of ratcheting strain, the lower the fatigue life. A modified total strain energy model is proposed, and the precision of life prediction is higher than that of traditional fatigue model.

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“…[5,6,[11][12][13] Among many other techniques, inorganic phosphate and chromate conversion coatings and sol-gel coatings have been successfully applied to protect surfaces temporarily for biodegradable implants application. [14][15][16][17][18][19][20][21][22][23][24][25][26] Creating hydrophobic or superhydrophobic surface coatings using hydrothermal treatments in acidic media was also demonstrated to increase the corrosion resistance of technical alloys. [27][28][29] Such treatments in aggressive acidic media are challenging to apply to highly oxidation-prone Mg-alloy surfaces.…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection properties of poly(4‐vinyl pyridine) containing multilayer polymeric coatings on magnesium alloy AZ31

Das

Kastania

Witt

et al. 2021

Materials & Corrosion

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The aim of this study is to develop polymeric thin films for corrosion protection of magnesium alloy AZ31. As polymer matrix, poly(4-vinyl pyridine) (P4VP) is selected due to its semiconducting properties and protonic conductivity. Polyacrylic acid is tested as crosslinking layers to improve interfacial adhesion. The macroscopic corrosion properties of the multilayer coatings are investigated by means of electrochemical methods, such as linear sweep voltammetry and electrochemical impedance spectroscopy (EIS), in corrosive media simulating technical and biomedical applications. It is demonstrated that thin multilayer coatings can suppress the corrosion rates of magnesium alloys. To our best knowledge, this is the first demonstration of the use of P4VP as a conducting polymer film with protonic conductivity for corrosion protection of magnesium alloys.

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Comparing physiologically relevant corrosion performances of Mg AZ31 alloy protected by ALD and sputter coated TiO2

Cited by 31 publications

References 52 publications

Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

Fatigue behavior after pre‐corroded in a simulated body fluid for ZK60 magnesium alloy prepared by micro‐arc oxidation

Corrosion protection properties of poly(4‐vinyl pyridine) containing multilayer polymeric coatings on magnesium alloy AZ31

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