Prediction of corrosion rate of AZ31B magnesium alloy under salt fog environment in NaCl solution

2013 ◽  
Vol 2 (1) ◽  
pp. 75-75
Author(s):  
D. Thirumalaikumarasamy
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Rate ◽  
Nacl Solution ◽  
Az31b Magnesium Alloy ◽  
Salt Fog

Degradation of Mechanically Surface Treated AZ31B Magnesium Alloy in 3.5 wt.% NaCl Solution

2019 ◽  
Vol 948 ◽  
pp. 237-242 ◽  
Author(s):  
Budi Arifvianto ◽  
Suyitno ◽  
Muslim Mahardika
Keyword(s):  
Magnesium Alloy ◽  
Immersion Test ◽  
Mg Alloy ◽  
Surface Mechanical Attrition Treatment ◽  
Degradation Behavior ◽  
Nacl Solution ◽  
Az31b Magnesium Alloy ◽  
Mechanical And Tribological Properties ◽  
Weight Losses ◽  
Mechanical Attrition

Surface mechanical attrition treatment (SMAT) has so far been used as a technique for improving mechanical and tribological properties of magnesium and its alloys. However, the effects of the SMAT on corrosion and degradability of these materials are still rarely reported in open literature. In this research, the degradation behavior of AZ31B magnesium alloy after receiving the SMAT was characterized. The degradation behavior of the Mg alloy was determined from the weight losses after an immersion test for 24 h in 3.5 wt.% NaCl solution. During the test, the pH of the solution was also monitored. The results obviously showed higher corrosion rates of the Mg alloy that had been treated by using the SMAT. Interestingly, the degradation rate of the Mg alloy decreased once a longer duration of SMAT was applied. Meanwhile, the pH of NaCl solution increased up to 12 and 13.9 once the non-treated and the SMAT specimens were immersed into the solution, respectively. In addition, the energy dispersive X-ray spectroscopy (EDS) analysis confirmed the presence of corrosion products in all the Mg samples that were similar to those revealed in the literature.

Microstructure and Corrosion Behavior of Hot Compressed AZ31B Magnesium Alloy Joint

2016 ◽  
Vol 849 ◽  
pp. 121-127
Author(s):  
Ya Jie Chu ◽  
Xin Chen Han ◽  
Zong Hui Yang ◽  
Xiao Quan Li
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Immersion Time ◽  
Chloride Ion ◽  
Immersion Test ◽  
Ion Concentration ◽  
Corrosion Morphology ◽  
Az31b Magnesium Alloy ◽  
Gas Tungsten Arc

The extruded AZ31B magnesium alloy plates of 4 mm thickness were butt welded using gas tungsten arc welding (GTA) process. The microstructure and corrosion behavior of the hot compressed welds were evaluated by conducting immersion test in NaCl solution at different immersion time and chloride ion concentrations. The specimens were exposed to immersion in order to characterize their corrosion rates. The corrosion morphology and pit morphology observation was carried out by scanning electron microscopy (SEM). The results showed that the corrosion rate of hot compressed magnesium alloy welds decreased with the increase in immersion time and the corrosion rate increased with the increase in chloride ion concentration, and the corrosion morphology was predominantly influenced by the distribution of β-phase.

Effects of Propargyl Alcohol on Electrochemical Behaviors of AZ91 Magnesium Alloy Anode in 3.5% NaCl Solution

2013 ◽  
Vol 750-752 ◽  
pp. 1137-1140
Author(s):  
Zu Xiao Yu ◽  
Shi Xiong Hao ◽  
Qing Shan Fu
Keyword(s):  
Magnesium Alloy ◽  
Corrosion Rate ◽  
Electrochemical Impedance ◽  
Propargyl Alcohol ◽  
Nacl Solution ◽  
Az91 Magnesium Alloy ◽  
Transfer Resistance ◽  
Electrochemical Behaviors ◽  
Alloy Anode ◽  
Az91 Magnesium

To improve corrosion rates and activation properties of AZ91 magnesium alloy anode, effects of additives (propargyl alcohol) on electrochemical behaviors of AZ91 magnesium alloy in 3.5% NaCl solution have been examined by studying corrosion rate, polarization, open circuit potential (Eocp) and transfer resistance values (Rt) of electrochemical impedance spectroscopy(EIS). The results show that propargyl alcohol not only decreases corrosion rate of AZ91 magnesium alloy anode, corrosion-inhibition ratio is 64.6%, but also increases activation properties of AZ91 when 1.0 % propargyl alcohol added into 3.5% NaCl solution. The current density of AZ91 reaches 9.46 mA.cm-2 at-1.35V. Its active potential (Eact ) is-1.527 V , and Eocp is-1.556 V.

Characteristics of Acoustic Emission during Fatigue of As-Rolled AZ31B Magnesium Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 579-584
Author(s):  
Hua Mao Zhou ◽  
Jian Qiu Wang ◽  
Qi Shan Zang ◽  
En Hou Han ◽  
Wei Ke
Keyword(s):  
Acoustic Emission ◽  
Magnesium Alloy ◽  
Crack Extension ◽  
Nacl Solution ◽  
Az31b Magnesium Alloy ◽  
Fatigue Process ◽  
Magnesium Alloy Az31b ◽  
Three Stages

The acoustic emission (AE) detected during the fatigue process in an as-rolled magnesium alloy AZ31B was analyzed. Measurements were made during fatigue in air as well as in aqueous 0.1% NaCl solution. Three stages of fatigue were detected with AE. It is concluded that plasticity, crack extension or friction was the main AE sources during fatigue.

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