Electrochemical Corrosion Behaviour of AZ91E Magnesium Alloy by means of Various Nanocoatings in Aqueous Peritoneal Solution: In Vitro and In Vivo Studies

As bio-absorbable implant material the magnesium alloy Mg-1Ca is able to degrade in-vivo. The mechanical properties of this alloy are similar to those of human bone; both Mg and Ca are essential elements in human body. The main problem is the high corrosion rate of this alloy. Two coating systems based on plasma-chemical oxidation and an organic dip coating are applied onto MgCa1.0 magnesium alloy in order to slow down the corrosion rate. The corrosion behaviour of the coated alloys was investigated with electrochemical noise measurements. The influence of hydrogen evolution and increasing pH-value on the cytotoxicity was examined. The results of these investigations suggest that a combination of both coating systems leads to promising degradation properties.

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Influence of chloride ion concentration on the electrochemical corrosion behaviour of plasma electrolytic oxidation coated AM50 magnesium alloy

Electrochimica Acta ◽

10.1016/j.electacta.2010.05.087 ◽

2010 ◽

Vol 55 (22) ◽

pp. 6802-6811 ◽

Cited By ~ 93

Author(s):

J. Liang ◽

P. Bala Srinivasan ◽

C. Blawert ◽

W. Dietzel

Keyword(s):

Magnesium Alloy ◽

Plasma Electrolytic Oxidation ◽

Corrosion Behaviour ◽

Electrochemical Corrosion ◽

Chloride Ion ◽

Ion Concentration ◽

Electrolytic Oxidation ◽

Plasma Electrolytic ◽

Electrochemical Corrosion Behaviour

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Influence of bicarbonate concentration on the conversion layer formation onto AZ31 magnesium alloy and its electrochemical corrosion behaviour in simulated body fluid

RSC Advances ◽

10.1039/c6ra08478h ◽

2016 ◽

Vol 6 (55) ◽

pp. 49910-49922 ◽

Cited By ~ 12

Author(s):

Arthanari Srinivasan ◽

Kwang Seon Shin ◽

Nallaiyan Rajendran

Keyword(s):

Magnesium Alloy ◽

Simulated Body Fluid ◽

Body Fluid ◽

Corrosion Behaviour ◽

Electrochemical Corrosion ◽

Magnesium Carbonate ◽

Az31 Magnesium Alloy ◽

Bicarbonate Concentration ◽

Sbf Solution ◽

Electrochemical Corrosion Behaviour

The electrochemical corrosion behaviour of a magnesium carbonate conversion layer-coated AZ31 magnesium alloy was evaluated in simulated body fluid (SBF) solution.

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Electrochemical Corrosion Behaviour of WE54 Magnesium Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.765.644 ◽

2013 ◽

Vol 765 ◽

pp. 644-647

Author(s):

O. Kazum ◽

Mathan Bobby Kannan ◽

Nico Scharnagl ◽

Carsten Blawert ◽

Ying He He

Keyword(s):

Magnesium Alloy ◽

Electrochemical Impedance ◽

Corrosion Behaviour ◽

Electrochemical Techniques ◽

Electrochemical Corrosion ◽

Corrosion Current ◽

Pure Magnesium ◽

Pitting Corrosion Resistance ◽

Electrochemical Corrosion Behaviour

The electrochemical corrosion behaviour of WE54 magnesium alloy in 0.5 wt.% NaCl solution was studied using electrochemical techniques. Polarization results suggested that the rare-earths in WE54 alloy enhanced the passivation tendency of the alloy and decreased the corrosion current by ~30% compared to pure magnesium. Pitting corrosion resistance was also higher in WE54 alloy than that in pure magnesium. Long-term electrochemical impedance results showed that the polarization resistance of WE54 alloy was more than two times higher than that of pure magnesium even after initial passivity breakdown.

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Electrochemical Corrosion Behaviour of ZE41 and QE22 Magnesium Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.690.385 ◽

2011 ◽

Vol 690 ◽

pp. 385-388 ◽

Cited By ~ 2

Author(s):

M. Bobby Kannan ◽

Carsten Blawert ◽

Wolfgang Dietzel

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloy ◽

Magnesium Alloys ◽

Rare Earths ◽

Pitting Corrosion ◽

Corrosion Behaviour ◽

Electrochemical Corrosion ◽

Localized Corrosion ◽

Az80 Magnesium Alloy ◽

Electrochemical Corrosion Behaviour

The study suggests that the rare-earths containing magnesium alloys ZE41 and QE22 exhibit a poorer corrosion resistance than the AZ80 magnesium alloy. Electrochemical experiments showed that the two rare-earths containing alloys are highly susceptible to localized corrosion. Post corrosion analysis revealed intergranular and pitting corrosion in ZE41, whereas QE22 alloy underwent only pitting corrosion.

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