Corrosion resistance of a nano-Mg modified silane conversion coating with cathodic protection on magnesium alloy AZ91D

2021 ◽  
Vol 284 ◽  
pp. 128930
Author(s):  
Yong Zhou ◽  
Pei Zhang ◽  
Fuan Yan
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Cathodic Protection ◽  
Conversion Coating ◽  
Alloy Az91d

Rare Earth Conversion Coating of Magnesium Alloy AZ91D

2007 ◽  
Vol 546-549 ◽  
pp. 555-558
Author(s):  
Li Qun Bai ◽  
Di Li ◽  
Min Guo ◽  
Jing Xin
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Magnesium Alloy ◽  
Electrochemical Behavior ◽  
Chemical Conversion ◽  
Conversion Coating ◽  
Alloy Az91d ◽  
Chemical Conversion Coating ◽  
Chloride Environment ◽  
Surface Morphologies

Rare earth chemical conversion coating of Mg alloys was studied. Corrosion and electrochemical behavior in chloride environment were investigated with tests of evolution of hydrogen and electrochemical measurements. The surface morphologies and composition of rare earth conversion coating were studied through SEM, EDAX and XPS. The results showed that rare earth conversion coatings could improve corrosion resistance and their corrosion resistance was comparable with that of chromate coatings (HB/Z5078278). This result was further proved by Polarization and EIS.

Nano Al2O3/phosphate Composite Conversion Coating Formed on Magnesium Alloy for Enhancing Corrosion Resistance

2013 ◽  
Vol 160 (11) ◽  
pp. C553-C559 ◽  
Author(s):  
Ming Zhao ◽  
Jianguo Li ◽  
Guangping He ◽  
Honglan Xie ◽  
Yanan Fu
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Conversion Coating

scholarly journals Improvement of bio-compatible AZ61 magnesium alloy corrosion resistance by fluoride conversion coating

2016 ◽  
Vol 60 (5) ◽  
pp. 132-138 ◽  
Author(s):  
J. Drábiková ◽  
F. Pastorek ◽  
S. Fintová ◽  
P. Doležal ◽  
J. Wasserbauer
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Simulated Body Fluid Solution ◽  
Conversion Coating ◽  
Az61 Magnesium Alloy ◽  
Wrought Magnesium Alloy ◽  
Consequent Effect ◽  
Materials Used ◽  
Short Time

Abstract Magnesium and its alloys are perspective bio-degradable materials used mainly due to their mechanical properties similar to those of mammal bones. Potential problems in utilization of magnesium alloys as bio-materials may relate to their rapid degradation which is associated with resorption problems and intensive hydrogen evolution. These problems can be eliminated by magnesium alloys surface treatment. Therefore, this work aims with analysis of the influence of fluoride conversion coating on corrosion characteristics of magnesium alloy. Unconventional technique by insertion of wrought magnesium alloy AZ61 into molten Na[BF4] salt at temperature of 450 °C at different treatment times was used for fluoride conversion coating preparation. The consequent effect of the coating on magnesium alloy corrosion was analyzed by means of linear polarization in simulated body fluid solution at 37 ± 2 °C. The obtained results prove that this method radically improve corrosion resistance of wrought AZ61magnesium alloy even in the case of short time of coating preparation.

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