Effect of Welding on Pitting and Intergranular Corrosion Behavior of Marine Grade Aluminum Alloy

2019 ◽  
Vol 8 (4) ◽  
pp. 20180118 ◽  
Author(s):  
Shanavas Shamsudeen ◽  
Edwin Raja Dhas John
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Intergranular Corrosion

Change of Intergranular Corrosion Behavior along the Thickness in a Friction-Stir-Welded 7N01-T5 Aluminum Alloy

2018 ◽  
Vol 941 ◽  
pp. 1754-1759
Author(s):  
Zhi Qiang Zhang ◽  
Ying Li ◽  
Yan Shuang Xing ◽  
Hua Yin ◽  
Chang Shu He
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Intergranular Corrosion ◽  
Corrosion Property ◽  
Temperature Cycling ◽  
Bottom Surface ◽  
Direction Parallel ◽  
Friction Stir ◽  
Welding Direction ◽  
The Relationship

The intergranular corrosion behavior of friction-stir-welded 7N01-T5 aluminum alloy joints was investigated by using sliced samples extract from the top, middle and bottom layers of the joint, with the sliced direction parallel to the welding direction. The relationship between microstructure and local corrosion property of the welded joints was analyzed. The results show that the heat-affected zone (HAZ) of the weld exhibit the highest susceptibility to intergranular corrosion, and the corrosion degree of the top and bottom surface layers were more serious than the central layer in the HAZ, continuously dispersed precipitates on grain boundaries and the grains size may be the main factor which caused the different corrosion severity of HAZ. The thermo-mechanically affected zone (TMAZ) is characterized by a highly deformed structure, and the temperature reached in this local zone during welding is high enough for the strengthening precipitates, especially the precipitates on the grain boundary to be partially re-dissolved. The temperature gradient caused resistance to intergranular corrosion of TMAZ reduced from top to bottom surface. The stirred zone (SZ) experienced heavily plastic deformation and temperature cycling, the sensibility of intergranular corrosion was low, which is attributed to the sufficient re-dissolve of the strengthening precipitates during welding.

Effect of Sealing Treatments on the Corrosion Behavior of Micro-arc Oxidation Coating on Aluminum Alloy in Acid NaCl Solution

2015 ◽  
Vol 30 (6) ◽  
pp. 627
Author(s):  
YE Zuo-Yan ◽  
LIU Dao-Xin ◽  
LI Chong-Yang ◽  
ZHANG Xiao-Hua ◽  
ZANG Xiao-Ming ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Nacl Solution ◽  
Micro Arc Oxidation

Salt fog corrosion behavior of friction stir welded AA2014-T651 aluminum alloy

2016 ◽  
Vol 58 (11-12) ◽  
pp. 932-938 ◽  
Author(s):  
Kollapuri Thamilarasan ◽  
Sadayan Rajendraboopathy ◽  
Gankidi Madhusudhan Reddy ◽  
Tadivaka Srinivasa Rao ◽  
Sajja Rama ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Friction Stir ◽  
Salt Fog Corrosion ◽  
Salt Fog

scholarly journals Corrosion behavior of ultrafine-grained AA2024 aluminum alloy produced by cryorolling

2017 ◽  
Vol 24 (11) ◽  
pp. 1293-1305 ◽  
Author(s):  
P. Laxman Mani Kanta ◽  
V.C. Srivastava ◽  
K. Venkateswarlu ◽  
Sharma Paswan ◽  
B. Mahato ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Ultrafine Grained
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