Corrosion Behavior of AZ91/AZ91-0.4%Nd Alloys in 3.5wt.% NaCl

2013 ◽  
Vol 291-294 ◽  
pp. 699-702
Author(s):  
Ju Mei Zhang ◽  
Zhi Hu Wang ◽  
Hui Cai ◽  
Ming Zhu ◽  
Li Bin Niu
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Immersion Test ◽  
Grain Refining ◽  
Az91 Magnesium Alloy ◽  
Weight Loss Method ◽  
Az91 Magnesium ◽  
Loss Method

The microstructure and corrosion behavior of commercial AZ91/AZ91-0.4%Nd alloys were investigated by OM, immersion test and weight-loss method. It was found that the number of Nd element in the AZ91 magnesium alloy has effect on the grain refining efficiency, the coarse β-Mg17Al12phase distributed along the grain boundaries transformed into granular, and the granular or acicular Al3Nd phase precipitated in matrix. The addition of Nd element significantly reduces the corrosion rate of AZ91-0.4%Nd magnesium alloy, as a result the corrosion resistance of alloy was improved obviously.

Microstructure and Corrosion Behavior of AZ91-0.4%Nd Magnesium Alloy

2013 ◽  
Vol 291-294 ◽  
pp. 2577-2580 ◽  
Author(s):  
Ju Mei Zhang ◽  
Zhi Hu Wang ◽  
Wan Chang Sun ◽  
Ming Zhu
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Immersion Test ◽  
Corrosion Products ◽  
Grain Refining ◽  
Az91 Magnesium Alloy ◽  
Refining Efficiency ◽  
Phase Precipitate ◽  
Az91 Magnesium

The corrosion behavior of AZ91-0.4%Nd alloys was investigated by immersion test in 3.5wt.% NaCl at 25°C. The phase compositions and microstructure of the AZ91-0.4%Nd alloy were characterized by XRD and OM, respectively. The results show that the number of Nd element in the AZ91 magnesium alloy has effect on the grain refining efficiency, and the granular or acicular Al3Nd phase precipitate in matrix.The corrosion products of the AZ91-0.4%Nd alloy mainly composed of Mg(OH)2and Al. The addition of Nd element significantly refine the microstructure and improve the compactness of corrosion products of AZ91-0.4%%Nd magnesium alloy, as a result the corrosion resistance of alloy was improved obviously.

scholarly journals Improvement of AZ91 Alloy Corrosion Properties by Duplex NI-P Coating Deposition

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1357 ◽  
Author(s):  
Jaromír Wasserbauer ◽  
Martin Buchtík ◽  
Jakub Tkacz ◽  
Stanislava Fintová ◽  
Jozef Minda ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Electrochemical Impedance ◽  
Salt Spray ◽  
Az91 Alloy ◽  
Neutral Salt ◽  
Az91 Magnesium Alloy ◽  
Corrosion Properties ◽  
Az91 Magnesium

The corrosion behavior of duplex Ni-P coatings deposited on AZ91 magnesium alloy was studied. The electroless deposition process of duplex Ni-P coating consisted in the preparation of low-phosphorus Ni-P coating (5.7 wt.% of P), which served as a bond coating and high-phosphorus Ni-P coating (11.5 wt.% of P) deposited on it. The duplex Ni-P coatings with the thickness of 25, 50, 75 and 100 µm were deposited on AZ91 magnesium alloy. The electrochemical corrosion behavior of coated AZ91 magnesium alloy was investigated by electrochemical impedance spectroscopy and potentiodynamic polarization method in 0.1 M NaCl. Obtained results showed a significant improvement in the corrosion resistance of coated specimens when compared to uncoated AZ91 magnesium alloy. From the results of the immersion tests in 3.5 wt.% NaCl, 10% solution of HCl and NaOH and 5% neutral salt spray, a noticeable increase in the corrosion resistance with the increasing thickness of the Ni-P coating was observed.

Enhanced Corrosion Resistance and Damping Capacity of As-Cast AZ91 Magnesium Alloys with Ce Addition

2011 ◽  
Vol 418-420 ◽  
pp. 246-249 ◽  
Author(s):  
Di Qing Wan
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Secondary Phase ◽  
Damping Capacity ◽  
Nacl Solution ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium ◽  
Morphology Modification ◽  
Loss Experiment

Through the weight loss experiment in 3.5%NaCl solution, the effect of Ce contents on the corrosion resistance of AZ91 magnesium alloy was carried out. In addition, the damping performance of Ce added AZ91 alloys were also studied. The result shows that adding Ce can significantly improve the corrosion resistance and damping capacity of AZ91 magnesium alloy; the grain refinement and secondary phase morphology modification can contribute to those properties improvement.

Effects of Erbium Addition on the Corrosion Resistance and Microstructure of AZ91 Magnesium Alloy

2011 ◽  
Vol 194-196 ◽  
pp. 1221-1224 ◽  
Author(s):  
Zhong Jun Wang ◽  
Yang Xu ◽  
Jing Zhu
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Discontinuous Precipitation ◽  
Az91 Magnesium Alloy ◽  
Continuous Precipitation ◽  
Az91 Magnesium ◽  
Precipitation Phase

The microstructures and corrosion resistance of AZ91 and AZ91+0.5 wt.% erbium (Er) magnesium alloys were studied, respectively. The results show that the Er addition in scrap AZ91 magnesium alloy can improve the corrosion resistance, markedly. The discontinuous precipitation phase (DPP) for Mg17Al12was retarded and the amount of DPP was decreased by 41% due to the formation of Al8ErMn4phase during solidification. The amount of continuous precipitation phase (CPP) in grains was decreased by 8% because of the formation of Al7ErMn5phase during solidification.

Corrosion of hot extrusion AZ91 magnesium alloy: I-relation between the microstructure and corrosion behavior

2011 ◽  
Vol 53 (5) ◽  
pp. 1960-1968 ◽  
Author(s):  
Tao Zhang ◽  
Yawei Shao ◽  
Guozhe Meng ◽  
Zhongyu Cui ◽  
Fuhui Wang
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Hot Extrusion ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium

Corrosion and Protection of Magnesium Alloys

2015 ◽  
Vol 1120-1121 ◽  
pp. 1078-1082 ◽  
Author(s):  
Yang Yang Lv ◽  
Ling Feng Zhang
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Automotive Industry ◽  
Physical And Mechanical Properties ◽  
Current Status ◽  
Strain Rates ◽  
Metallic Materials ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium

Magnesium alloy as a green material in the 21st century, because of its excellent physical and mechanical properties of metallic materials as an ideal in the automotive industry, electronic industry and aviation, aerospace and other industries[1]. However, poor corrosion resistance of magnesium alloys become an important issue hinder application of magnesium alloys[2]. So magnesium alloy corrosion problems and the current status of research paper reviews several magnesium alloy protection methods at home and abroad, and also highlighted with our latest laser shock (LSP) study of AZ91 magnesium alloy at high strain rates of corrosion resistance results.

Study on Corrosion Resistance of Brass in Circulating Cooling Water with Different Concentration Ratio

2012 ◽  
Vol 511 ◽  
pp. 70-73
Author(s):  
Yu Chun Li ◽  
Xiao Wei Liu ◽  
Rui Feng Zhang ◽  
Kang Juan ◽  
Fan Gao
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Concentration Ratio ◽  
Water System ◽  
Cooling Water ◽  
Cooling Water System ◽  
Circulating Cooling Water ◽  
Weight Loss Method ◽  
Ratio Condition ◽  
Loss Method

Abstract: The corrosion resistance of brass H70-1A cooling water was studied through weight-loss method and electrochemistry measurement in different concentration ratio condition. The results obtained from this study showed that brass inhibitor was necessary to add to circulating cooling water system when concentration ratio was in the range of 3~7.

Corrosion behavior of AZ91 magnesium alloy in dilute NaCl solutions

2010 ◽  
Vol 31 (2) ◽  
pp. 857-863 ◽  
Author(s):  
Lei Wang ◽  
Bo-Ping Zhang ◽  
Tadashi Shinohara
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium
Sign in / Sign up

Export Citation Format

Share Document