scholarly journals The Effect of Ultraviolet Wavelength on Corrosion Behavior of 7075 Aluminum Alloy in the Marine Atmospheric Environment

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yanyu Cui ◽  
Yuning Gao ◽  
Yongxiang Qin ◽  
Xiaoyu Shi
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Salt Spray ◽  
Atmospheric Environment ◽  
Ultraviolet Rays ◽  
7075 Aluminum Alloy ◽  
Marine Atmosphere ◽  
Accelerated Corrosion ◽  
Ultraviolet Wavelength ◽  
Oxygen Atoms

The influence of ultraviolet rays on the corrosion behavior of 7075 aluminum alloy in the marine atmosphere was studied by salt spray corrosion test. Electrochemical methods and surface analysis techniques were used to analyze and compare the corrosion laws of 7075 aluminum alloy in the marine atmosphere under ultraviolet radiation with wavelengths of 0 nm, 185 nm, 254 nm, and 365 nm. The results showed that ultraviolet light irradiation could promote the corrosion of 7075 aluminum alloy. Oxygen was prone to chemical reactions to form oxygen atoms after being irradiated by ultraviolet rays, and oxygen atoms recombined with oxygen to form ozone in the marine atmosphere. The 7075 aluminum alloy in the marine atmosphere accelerated corrosion due to the increasing ozone content. Although there were passivation films with different degrees of protection on the surface of aluminum alloy under ultraviolet irradiation, the surface of 7075 aluminum alloy in the marine atmosphere failed to form a stable passivation film after pitting, and the corrosion rate was the fastest when the ultraviolet wavelength was 185 nm.

The corrosion behavior of marine aluminum alloy MIG welded joints in a simulated tropical marine atmosphere

2021 ◽  
Vol 63 (2) ◽  
pp. 151-156
Author(s):  
Lihua Gong ◽  
Weimin Guo ◽  
Feng Pan
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Rate ◽  
Base Metal ◽  
Corrosion Behavior ◽  
Welded Joint ◽  
Salt Spray ◽  
Atmospheric Environment ◽  
Cycle Period ◽  
Corrosion Tests ◽  
Immersion Corrosion

Abstract The influence of metal inert-gas arc welding (MIG) on the corrosion behavior of 6061-T6 aluminum alloy in a simulated tropical marine atmospheric environment (related to high temperature, high humidity and high salt spray) were examined by dry-wet alternate immersion corrosion tests. The equivalent conversion was used to design the accelerated test time. The results show that in the initial stage, the intermetallic compound, rich in Fe, Si and Cu, had little influence on corrosion resistance in the heat-affected zone. For a corrosion time of 3 days in a tropical marine atmospheric environment, the corrosion rate of the welded joint increased rapidly, even reaching 3.5 times that of the base metal. Though the corrosion products had significant impact on slowing down the corrosion rate, as with the base metal, the corrosion rate of the welded joint was nearly double that of the base metal during the longest cycle period involving alternate immersion corrosion tests for 20 days.

Effect of Laser Shock Processing on Electrochemical Corrosion Behavior of 7075 Aluminum Alloy Plasma Arc Weldments

2015 ◽  
Vol 42 (12) ◽  
pp. 1203006
Author(s):  
王江涛 Wang Jiangtao ◽  
张永康 Zhang Yongkang ◽  
陈菊芳 Chen Jufang ◽  
周金宇 Zhou Jinyu ◽  
卢雅琳 Lu Yalin ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Electrochemical Corrosion ◽  
7075 Aluminum Alloy ◽  
Plasma Arc ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Electrochemical Corrosion Behavior ◽  
Shock Processing

Study on Accelerated Corrosion Test Environment Spectrum of Aluminum Alloys in a Typical Marine Atmosphere

2012 ◽  
Vol 557-559 ◽  
pp. 50-53
Author(s):  
Shi Bo Xing ◽  
Xiao Gang Li ◽  
Li Li
Keyword(s):  
Aluminum Alloys ◽  
Corrosion Test ◽  
Salt Spray ◽  
Atmospheric Environment ◽  
Test Environment ◽  
Accelerated Corrosion ◽  
Severe Problem ◽  
Irradiation Test ◽  
Infiltration Test ◽  
Accelerated Corrosion Test

With the increasing effects of a corrosive environment on aluminum alloys, the corrosion of aluminum alloys has become a severe problem. In this paper, the accelerated corrosion test environment spectrum and corrosion equivalent relationship was systematically studied. The Accelerated Corrosion Test Environment Spectrum of aluminum alloys under a typical marine atmospheric environment was established. The Spectrum is composed of three parts, namely, a periodic infiltration test, a UV irradiation test, and a salt spray test. The Spectrum can well simulate aluminum alloy corrosion in a typical marine atmospheric environment.

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 Initial corrosion behavior and mechanism of 7B04 aluminum alloy under acid immersion and salt spray environments

2021 ◽  
Author(s):  
Yangguang Zhang ◽  
Yueliang Chen ◽  
Yong Zhang ◽  
Guixue Bian ◽  
Chenguang Wang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Salt Spray

Investigating local corrosion behavior and mechanism of MAO coated 7075 aluminum alloy

2020 ◽  
Vol 826 ◽  
pp. 153976 ◽  
Author(s):  
Shengnan Wang ◽  
Yanhong Gu ◽  
Yinliang Geng ◽  
Jian Liang ◽  
Jie Zhao ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Local Corrosion ◽  
7075 Aluminum Alloy

The Research Progress of Aluminum Alloy Corrosion in Marine Atmosphere

2014 ◽  
Vol 1004-1005 ◽  
pp. 136-141 ◽  
Author(s):  
Qi Song ◽  
Wen Jin Zhang ◽  
Ai Ai Zhang ◽  
Wei Fang Zhang
Keyword(s):  
Aluminum Alloy ◽  
Relative Humidity ◽  
Corrosion Rate ◽  
Research Direction ◽  
Atmospheric Environment ◽  
Research Progress ◽  
Marine Atmosphere ◽  
Alloy Structure ◽  
Exposure Test ◽  
Environment Exposure

It is very important to study on the corrosion of aluminum in marine atmospheric environment, because aluminum alloy structure of weapon equipment usually serves in marine atmospheric environment. On the basis of marine atmospheric environment corrosion features, the paper summarizes the influence of marine atmospheric environment influencing factors (e.g., Relative Humidity, Concentration of cl-, Alternate Drying-Wetting, Rainfall) on corrosion rule and corrosion rate of aluminum alloy, and analyses the mechanism of pitting, inter-granular corrosion and denudation. Then the natural environment exposure test and accelerated test were compared. Finally, the key research direction in the field of aluminum alloy corrosion in marine atmosphere was pointed out.

Corrosion Behavior of Field-Exposed 7A04 Aluminum Alloy in the Xisha Tropical Marine Atmosphere

2015 ◽  
Vol 24 (8) ◽  
pp. 2885-2897 ◽  
Author(s):  
Z. Y. Cui ◽  
X. G. Li ◽  
C. Man ◽  
K. Xiao ◽  
C. F. Dong ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Marine Atmosphere ◽  
Tropical Marine Atmosphere
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