scholarly journals Breakdown and Pitting Formation of Anodic Film Aluminum Alloy (3003)

2010 ◽  
Vol 4 (5) ◽  
Author(s):  
Sami A. Ajeel ◽  
Nahidh W. Kasser ◽  
M.Sc. Basheer A. Abdul-Hussein
Keyword(s):  
Aluminum Alloy ◽  
Anodic Film

Effect of Anodic Films on Galvanic Corrosion Behavior of TC4 Titanium Alloy and LY12 Aluminum Alloy

2014 ◽  
Vol 998-999 ◽  
pp. 39-42
Author(s):  
Zhi Yong Wu ◽  
Xue Yuan Li ◽  
Li Ning Zhao ◽  
Su Rong Hu
Keyword(s):  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Galvanic Corrosion ◽  
Anodic Film ◽  
Corrosion Mechanism ◽  
Anodic Films ◽  
Galvanic Current ◽  
Corrosion Morphology ◽  
Tc4 Titanium Alloy

Galvanic corrosion behavior of TC4 titanium alloy coupled LY12 aluminum alloy was investigated in 3.5% NaCl solution. Particular attention was given to the effect of three different oxidation films. Galvanic corrosion test was conducted on TC4 titanium alloy which coupled LY12-sulfuric acid anodic film (LY12/A(S)), LY12-chromic acid anodic film (LY12/A(Cr)), LY12-hard anodic film (LY12/A(S) hd) and bare LY12, respectively. Galvanic corrosion current (Ig) and average galvanic current density (Ig’) were monitored. Corrosion morphology was observed by camera and corrosion mechanism was discussed. The results show that the three anodic films improve the corrosion resistance of the anode in different magnitudes. LY12/A(S) hd is found to be least susceptible to galvanic corrosion when coupled TC4 titanium alloy. LY12/A(S) and LY12/A(Cr) are found to be moderately susceptible to galvanic corrosion. But the bare LY12 is highly susceptible to galvanic corrosion in corrosive environment.

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