Influence of Media pH on Corrosion Behaviour of AZ31 Magnesium Alloy in Chloride and Sulphate Media

2021 ◽  
Vol 57 (6) ◽  
pp. 675-688
Author(s):  
M. Gururaj Acharya ◽  
A. Nityananda Shetty
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Behaviour ◽  
Az31 Magnesium Alloy ◽  
Sulphate Media

scholarly journals INFLUENCE OF A PREFABRICATED-CROWN ROLLING PROCESS ON THE CORROSION BEHAVIOUR OF AZ31 MAGNESIUM ALLOY

2021 ◽  
Vol 55 (4) ◽  
Author(s):  
Zhiquan Huang ◽  
Jinchao Zou ◽  
Junpeng Wang ◽  
Yanjie Pei ◽  
Renyao Huang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Electrochemical Impedance ◽  
Corrosion Behaviour ◽  
Plate Thickness ◽  
Az31 Alloy ◽  
Rolling Process ◽  
Charge Transfer Resistance ◽  
Az31 Magnesium Alloy ◽  
Transfer Resistance

The present study aims to investigate the effect of a prefabricated-crown rolling process on the corrosion characteristic of the AZ31 magnesium alloy. Specimens made of the AZ31 alloy were rolled under various crown conditions, and their microstructure evolution and corrosion behavior were analyzed. The corrosion behavior was studied using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed that the corrosion-current density of the AZ31 alloy with a side pressure of 37.5 % of the plate thickness of the precast convexity decreased from 3.79 × 10–6 A/cm2 to 1.80 × 10–6 A/cm2, and the difference between the edge and the middle of the AZ31 alloy was shortened from 2.05 × 10–6 A/cm2 to 1.14 × 10–6 A/cm2. The charge-transfer resistance also increased from 507.1 Ω·cm2 to 581.2 Ω·cm2. The improvement in the corrosion resistance is a result of the more stable corrosion products and microstructure refinement formed after the prefabricated-crown rolling process.

scholarly journals Corrosion behaviour of AZ31 magnesium alloy with different grain sizes in simulated biological fluids☆

2010 ◽  
Vol 6 (5) ◽  
pp. 1763-1771 ◽  
Author(s):  
M. Alvarez-Lopez ◽  
María Dolores Pereda ◽  
J.A. del Valle ◽  
M. Fernandez-Lorenzo ◽  
M.C. Garcia-Alonso ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Behaviour ◽  
Biological Fluids ◽  
Az31 Magnesium Alloy ◽  
Grain Sizes

scholarly journals Corrosion Behaviour of Preserved PEO Coating on AZ31 Magnesium Alloy

2020 ◽  
Vol 23 (2) ◽  
pp. B76-B88
Author(s):  
Filip Pastorek ◽  
Milan Štrbák ◽  
Daniel Kajánek ◽  
Martina Jacková ◽  
Jana Pastorková ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Treatment Process ◽  
Corrosion Behaviour ◽  
Salt Spray ◽  
Az31 Magnesium Alloy ◽  
Electrochemical Tests ◽  
Marine Transport ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

A surface treatment process, composed of plasma electrolytic oxidation (PEO) and sealing by temporary oil preservation system containing corrosion inhibitors, was performed on AZ31 magnesium alloy in order to improve its corrosion resistance in environments containing chlorides. Both atmospheric and immersion conditions were evaluated by electrochemical tests in 0.1M NaCl solution together with salt spray test according to STN EN ISO 9227 standard. The obtained results confirmed significant improvement of corrosion resistance reached by the PEO sealing in aggressive environments compared to the pure PEO coating on AZ31 surface. Hence, such a duplex coating is a very perspective alternative for magnesium alloy applications in severe conditions or for temporary protection of magnesium products coated by the PEO during marine transport.

scholarly journals WEAR AND BIO-CORROSION BEHAVIOUR OF HEAT TREATED AZ31 MAGNESIUM ALLOY

2018 ◽  
Vol 22 (02) ◽  
Author(s):  
Shahad Jassim Mohammed ◽  
◽  
Sahib Mohammed Mahdi ◽  
Ahmed Kamal Mahmod ◽  
◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Behaviour ◽  
Az31 Magnesium Alloy ◽  
Heat Treated

Effect of crystal orientation and {101¯2} twins on the corrosion behaviour of AZ31 magnesium alloy

2020 ◽  
Vol 827 ◽  
pp. 154096 ◽  
Author(s):  
Jinhua Peng ◽  
Zhen Zhang ◽  
Chang Long ◽  
Huanhuan Chen ◽  
Yong Wu ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Crystal Orientation ◽  
Corrosion Behaviour ◽  
Az31 Magnesium Alloy

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

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 49910-49922 ◽  
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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