Effects of aging mechanisms on the exfoliation corrosion behavior of a spray deposited Al–Zn–Mg–Cu–Zr aluminum alloy

2017 ◽  
Vol 32 (6) ◽  
pp. 1105-1117 ◽  
Author(s):  
Liuqun Xie ◽  
Qian Lei ◽  
Mingpu Wang ◽  
Xiaofei Sheng ◽  
Zhou Li
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Exfoliation Corrosion ◽  
Aging Mechanisms ◽  
Image Position ◽  
Effects Of Aging

Abstract

Exfoliation corrosion behavior of 7050-T6 aluminum alloy treated with various quench transfer time

2014 ◽  
Vol 24 (7) ◽  
pp. 2258-2265 ◽  
Author(s):  
Feng-xuan SONG ◽  
Xin-ming ZHANG ◽  
Sheng-dan LIU ◽  
Qi TAN ◽  
Dong-feng LI
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Transfer Time ◽  
Exfoliation Corrosion

Exfoliation Corrosion Behavior of 2B06 Aluminum Alloy in a Tropical Marine Atmosphere

2014 ◽  
Vol 24 (1) ◽  
pp. 296-306 ◽  
Author(s):  
Z. Y. Cui ◽  
X. G. Li ◽  
K. Xiao ◽  
C. F. Dong ◽  
L. W. Wang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Marine Atmosphere ◽  
Exfoliation Corrosion ◽  
Tropical Marine Atmosphere

scholarly journals Effect of Deformation and Aging on Properties of Al-4.1%Cu-1.4%Mg Aluminum Alloy

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Hao Wang ◽  
Changsheng Li ◽  
Jing Li ◽  
Xinglong Wei ◽  
Ruibin Mei
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Aging Effect ◽  
Al Alloy ◽  
Exfoliation Corrosion ◽  
Aging Mechanism ◽  
Orthogonal Experiments ◽  
Before And After ◽  
Peak Aging ◽  
Aging Mechanisms

Deformation scheme and preheat treatment of Al-4.1%Cu-1.4%Mg aluminum alloy are chosen, homogenizing annealing at 430°C for 1.5 h, cooling to 250°C in furnace at a cooling rate of less than 30°C/h and then cooling to room temperature to make Al-4.1%Cu-1.4%Mg aluminum alloy annealed fully. Heat treatment tests of Al-4.1%Cu-1.4%Mg aluminum alloy mainly consisting of rolling and aging were conducted, and the optimum peak of aging mechanism is 190°C/12 h. Through comparison of microstructure and mechanical properties with different deformation rates and aging mechanisms, effect of deformation rates and aging mechanism on properties of Al-4.1%Cu-1.4%Mg aluminum alloy was analyzed, and the optimum double peak of aging mechanism is 135°C/7 h + 185°C/14 h. Orthogonal experiments were carried out to analyze mechanical and electrical properties of tested materials before and after deformation, and the effect of aging mechanism on Al-4.1%Cu-1.4%Mg Al alloy was analyzed, and the optimum regression of aging mechanism is 190°C/12 h + 240°C/40 min + 190°C/12 h. Aging scheme is closely related to corrosion resistance of Al-4.1%Cu-1.4%Mg aluminum alloy, and three different aging schemes can improve the corrosion resistance. The exfoliation corrosion evaluation results show that the aging effect on exfoliation corrosion ability order is RRA > two-step aging > peak aging.

scholarly journals Effect of Cu and Mg on the corrosion behavior of 4004/Al-Mn-Cu-Mg-Si/4004 aluminum alloy brazing sheet

2020 ◽  
Vol 326 ◽  
pp. 04001
Author(s):  
Xiaojie Jin ◽  
Pizhi Zhao ◽  
Shijie Guo ◽  
Wenjing Zhang ◽  
Nianmei Han ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Electric Potential ◽  
Electron Probe ◽  
Potential Distribution ◽  
Sea Water ◽  
Core Material ◽  
Concentration Gradients ◽  
Exfoliation Corrosion ◽  
Free Zone

Higher strength and better corrosion resistance are necessary to enable the thickness reduction of the aluminum alloy brazing sheets. In this work, an age-hardenable Al-Mn-Cu-Mg-Si core alloy was developed by the addition of Mg, Si and Cu. The corrosion behavior of 4004/Al-Mn-Cu-Mg-Si/4004 aluminum alloy brazing sheet in sea water acidified accelerated test (SWAAT) was investigated and compared with the traditional 4004/3003/4004 aluminum alloy brazing sheet. The microstructure was characterized by optical microscopy (OM), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). After brazing, it was found that the microstructures of two aluminum alloy brazing sheets from outer to the center were precipitate-free zone (PFZ), the band of dense precipitates (BDP) and core material, respectively. In particular, both Cu and Mg concentration gradients were formed in the BDP region of 4004/Al-Mn-Cu-Mg-Si/4004. Moreover, the SWAAT results showed exfoliation corrosion in 4004/Al-Mn-Cu-Mg-Si/4004, while in 4004/3003/4004, severe inter-granular corrosion in core material was observed after corrosion for 584 h. The theoretical electric potential distribution showed that the presence of Cu and Mg concentration gradient promoted the formation of the electric potential trough in the BDP region, which may be the reason for the occurrence of exfoliation corrosion in 4004/Al-Mn-Cu-Mg-Si/4004.

Exfoliation Corrosion Behavior of 2524 Aluminum Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 1159-1162 ◽  
Author(s):  
Sheng Yang ◽  
Dan Qing Yi ◽  
Su Juan Yao ◽  
Ya Ping Hou
Keyword(s):  
Aluminum Alloy ◽  
Electron Microscope ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Hydrogen Evolution ◽  
Corrosion Behavior ◽  
Electrochemical Impedance ◽  
Exfoliation Corrosion ◽  
Corrosion Kinetics ◽  
Transmission Electron

The exfoliation corrosion behavior of 2524 aluminum alloy was studied by Transmission Electron Microscope (TEM), hydrogen evolution and Electrochemical impedance spectroscopy (EIS) . The results showed that 2524 aluminum alloy was very susceptible to exfoliation corrosion and the exfoliation corrosion appeared after 24 h. EIS could better explain the exfoliation corrosion than hydrogen evolution. Exfoliation corrosion kinetics included accelerated formation of pitting, quick development of pitting, retarded formation of exfoliation and steady development of exfoliation.

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
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