scholarly journals Effect of heat treatment on corrosion behavior of Mg–5Gd–3Y–0.5Zr alloy

RSC Advances ◽  
2020 ◽  
Vol 10 (71) ◽  
pp. 43371-43382
Author(s):  
Qian Zhang ◽  
Quanan Li ◽  
Xiaoya Chen
Keyword(s):  
Heat Treatment ◽  
Weight Loss ◽  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Electrochemical Test ◽  
Treatment Processes

The effects of different heat treatment processes on the microstructure and corrosion behavior of Mg–5Gd–3Y–0.5Zr (GW53K) magnesium alloy were studied by means of microanalysis, weight loss test and electrochemical test.

EFFECT OF FRICTION STIR PROCESSING ON CORROSION BEHAVIOR OF CAST AZ91C MAGNESIUM ALLOY

2019 ◽  
Vol 26 (06) ◽  
pp. 1850213 ◽  
Author(s):  
BEHZAD HASSANI ◽  
RUDOLF VALLANT ◽  
FATHALLAH KARIMZADEH ◽  
MOHAMMAD HOSSEIN ENAYATI ◽  
SOHEIL SABOONI ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Friction Stir Processing ◽  
Potentiodynamic Polarization ◽  
Passive Layer ◽  
Friction Stir ◽  
T6 Heat Treatment ◽  
Az91c Magnesium Alloy

The corrosion behavior of as-cast AZ91C magnesium alloy was studied by performing friction stir processing (FSP) and FSP followed by solution annealing and then aging. Phase analysis, microstructural characterization, potentiodynamic polarization test and immersion tests were carried out to relate the corrosion behavior to the samples microstructure. The microstructural observations revealed the breakage and dissolution of coarse dendritic microstructure as well as the coarse secondary [Formula: see text]-Mg[Formula: see text]Al[Formula: see text] phase which resulted in a homogenized and fine grained microstructure (15[Formula: see text][Formula: see text]m). T6 heat treatment resulted in an excessive growth and dispersion of the secondary phases in the microstructure of FSP zone. The potentiodynamic polarization and immersion tests proved a significant effect of both FSP and FSP followed by T6 on increasing the corrosion resistance of the cast AZ91C magnesium alloy. Improve in corrosion resistance after FSP was attributed to grain refinement and elimination of segregations and casting defects which makes more adhesive passive layer. Increase in volume fraction of precipitations after T6 heat treatment is determined to be the main factor which stabilizes the passive layer at different polarization values and is considered to be responsible for increasing the corrosion resistance.

scholarly journals Study on heat treatment to improve the microstructure and corrosion behavior of ZK60 magnesium alloy

2020 ◽  
Vol 9 (5) ◽  
pp. 11201-11219
Author(s):  
Zhen Li ◽  
Zeyin Peng ◽  
Yubing Qiu ◽  
Kai Qi ◽  
Zhenyu Chen ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Zk60 Magnesium Alloy

scholarly journals The performance of CO2/N2 separation on P84/NCC-based tubular carbon membrane under different carbonization conditions

2019 ◽  
Vol 15 (3) ◽  
pp. 447-450 ◽  
Author(s):  
Norazlianie Sazali ◽  
Mohd Syafiq Sharip ◽  
Haziqatulhanis Ibrahim ◽  
Wan Norharyati Wan Salleh ◽  
Nur Izwanne Mahyon ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Weight Loss ◽  
Heating Rate ◽  
Flow Rate ◽  
Dip Coating ◽  
Carbonization Temperature ◽  
Carbon Membrane ◽  
Treatment Processes ◽  
Dip Coating Technique ◽  
Permeation Properties

In this study, the influence of carbonization environment on the performance of Tubular Carbon Membrane (TCMs) was explored. P84 co-polyimide/Nanocrystalline cellulose-based TCMs were synthesized by dip-coating technique. The permeation properties of TCMs were determined by employing pure gas of CO2 and N2. Heat treatment processes were carried out under different environment (Argon, Nitrogen, and Helium) with the flow rate of 200 ml/min to boost the membrane’s performance. The carbonization process was performed at a consistent carbonization temperature of 800oC under heating rate of 3oC/min. Carbonization under Argon environment was found to be the best condition for PI/NCC-based TCMs preparation with the permeance of 3.22±3.21and 213.56±2.17 GPU for N2, and CO2 gases, respectively. This membrane exhibited the uppermost CO2/N2 selectivity of 66.32±2.18. TCMs prepared under Ar environment experienced less weight loss while exhibiting highest CO2/N2 selectivity as compared to those prepared under He and N2 environment.

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.

scholarly journals Effect of Aging Heat Treatment on Corrosion Behavior and Corrosion Kinetics of 17-4PH Stainless Steel in Artificial Saliva

2021 ◽  
Vol 50 (3) ◽  
pp. 849-858
Author(s):  
ONTHIDA KOSASANG ◽  
MANUTCHAYA WONGKAEWMOON ◽  
SOMWAN CHUMPHONGPHAN
Keyword(s):  
Heat Treatment ◽  
Weight Loss ◽  
Stainless Steel ◽  
Corrosion Behavior ◽  
Pitting Corrosion ◽  
Artificial Saliva ◽  
Function Form ◽  
Corrosion Kinetics ◽  
Power Law Function ◽  
Kinetics Of

The corrosion behavior of the sintered 17-4PH stainless steel samples aged at different conditions in artificial saliva was studied using the method of electrochemical and weight loss after exposure for various periods of time. The results showed that the samples aged at 480 °C for 1 h exhibited the highest corrosion resistance.The pitting corrosion was predominantly initiated from existing, isolated pores and further accelerated. The corrosion kinetics trend is found to be more consistent with a bimodal function form rather than the classical power-law function.

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