Effects of chunk breakage and surface protective film on negative difference effect of magnesium alloys

2001 ◽  
Vol 7 (4) ◽  
pp. 385-391 ◽  
Author(s):  
Choong Do Lee ◽  
Choon Sik Kang ◽  
Kwang Seon Shin
Keyword(s):  
Magnesium Alloys ◽  
Protective Film ◽  
Negative Difference ◽  
Difference Effect

Investigation on the Discharge Behaviors of AZ31 and AZ61 Magnesium Alloys as Anode Material of Metal-Air Fuel Cells

2014 ◽  
Vol 1051 ◽  
pp. 211-214 ◽  
Author(s):  
Zhong Ping Xiong ◽  
Yu Jun Si ◽  
Xue Song Feng ◽  
Min Jiao Li
Keyword(s):  
Fuel Cells ◽  
Anode Material ◽  
Magnesium Alloys ◽  
Az31 Alloy ◽  
Discharge Process ◽  
Az61 Alloy ◽  
Discharge Efficiency ◽  
Negative Difference ◽  
Difference Effect ◽  
Fuel Material

AZ31 and AZ61 magnesium alloys were discharged in 1.2mol·L-1 MgSO4 solution to investigate their performances as anode fuel material in metal-air fuel cells. The results show that aluminum in alloys takes part in the discharge process and forms the colloid of Al (OH)3. The Al (OH)3 facilitates Mg (OH)2 dropping from the surface of alloy electrode, which results in the more negative and stable discharging potential of AZ61 alloy than AZ31 alloy. The discharge efficiency of AZ31 alloy is less than AZ61 alloy because of the more server negative difference effect of AZ31 alloy.

A new theory for the negative difference effect in magnesium corrosion

2011 ◽  
Vol 63 (8) ◽  
pp. 707-712 ◽  
Author(s):  
S. Bender ◽  
J. Goellner ◽  
A. Heyn ◽  
S. Schmigalla
Keyword(s):  
Negative Difference ◽  
Difference Effect

Mg Dissolution in Phosphate and Chloride Electrolytes: Insight into the Mechanism of the Negative Difference Effect

CORROSION ◽  
10.5006/1459 ◽  
2015 ◽  
Vol 71 (2) ◽  
pp. 234-241 ◽  
Author(s):  
S. Lebouil ◽  
O. Gharbi ◽  
P. Volovitch ◽  
K. Ogle
Keyword(s):  
Negative Difference ◽  
Insight Into ◽  
Difference Effect

Effect of Indium on the Negative Difference Effect for Magnesium Alloy

2021 ◽  
Author(s):  
Tongyao Bao ◽  
Yinghui Wei ◽  
Lifeng Hou ◽  
Junli Sun ◽  
Xiaoda Liu ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Negative Difference ◽  
Difference Effect

Corrosion Behavior of AZ61 Magnesium Alloys in NaCl Solution

2011 ◽  
Vol 239-242 ◽  
pp. 2240-2243
Author(s):  
Yue Sheng Chai ◽  
Li Na Wang ◽  
Gang Sun ◽  
Shu Li Sun ◽  
Min Gang Zhang
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Rate ◽  
Magnesium Alloys ◽  
Corrosion Behavior ◽  
Chloride Concentration ◽  
Ion Concentration ◽  
Etching Time ◽  
Protective Film ◽  
Corrosion Morphology ◽  
Az61 Magnesium Alloy

Magnesium alloys are used widely because of its good performance. However, its practical application is restricted by low corrosion resistance. In this study, the effects of corrosion time and NaCl concentration on the corrosion behavior of AZ61 magnesium alloy were investigated from the corrosion morphology and the corrosion rate. These results have displayed that the corrosion rate of AZ61 magnesium alloy decreases with the increasing etching time. Meanwhile, the corrosion rate of AZ61 magnesium alloy increases with the increasing sodium chloride concentration. This is mainly because that the Cl- ion in the solution destroys the protective film on the surface of magnesium alloy and the high Cl- ion concentration accelerates the corrosion rate.

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