Properties degradation and atmospheric corrosion mechanism of 6061 aluminum alloy in industrial and marine atmosphere environments

2016 ◽  
Vol 68 (5) ◽  
pp. 529-535 ◽  
Author(s):  
X. K. Yang ◽  
L. W. Zhang ◽  
S. Y. Zhang ◽  
M. Liu ◽  
K. Zhou ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Atmospheric Corrosion ◽  
Corrosion Mechanism ◽  
Marine Atmosphere ◽  
6061 Aluminum Alloy

Low-cycle fatigue behavior and corrosion mechanism of pre-corroded 2A70-T6 aluminum alloy

2020 ◽  
Vol 67 (2) ◽  
pp. 228-239
Author(s):  
Hui Li ◽  
Lei Fu ◽  
Li Lin ◽  
Yu Chen ◽  
YunRong Luo ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Atmospheric Corrosion ◽  
Fatigue Behavior ◽  
Fatigue Performance ◽  
Corrosion Mechanism ◽  
Accelerated Corrosion ◽  
Corrosion Failure ◽  
Content Type ◽  
X Ray

Purpose In summary, it can be found that the current research on the simulation of natural atmospheric dry–wet alternating accelerated corrosion mainly focused on the study of electrochemical corrosion process and the study of corrosion rate; the micro-pre-corrosion mechanism of materials in this environment, especially for materials. The specific effects of fatigue and fracture performance still lack detailed research. Accordingly, this study aims to more realistically simulate the effect of natural atmospheric corrosion environment on the corrosion resistance and fatigue performance of aircraft skin. Design/methodology/approach In this study, the uniaxial strain control method was used to test the fatigue performance of pre-corrosion samples under simulated natural atmospheric corrosion using MTS809 tensile-torque composite fatigue machine. Scanning electron microscopy, X-ray energy spectrum analysis, atomic force microscopy and X-ray diffraction analysis were used. Fatigue fracture, corrosion morphology and corrosion products were analyzed. Findings The results show that the deep corrosion pit caused by pre-corrosion environment leads to multi-source initiation of crack; the fatigue life of pre-corroded sample decreases by about one-half, chloride ion invades the material and promotes intergranular corrosion; life prediction results show that the natural atmospheric corrosive environment mainly affects the plastic term in the Manson–Coffin formula resulting in a decrease in fatigue life. Originality/value Innovative experimental schemes and materials are used and the test temperature and relative humidity are strictly controlled. The corrosion failure mechanism of 2A70-T6 aluminum alloy under alternating wet and dry accelerated corrosion environment and its influence on fatigue behavior were obtained.

New atmospheric corrosion inhibitor of aluminum alloy D16

2020 ◽  
pp. 38-46
Author(s):  
A.M. Semiletov ◽  
◽  
Yu.B. Makarychev ◽  
A.A. Chirkunov ◽  
L.P. Kazansky ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Inhibitor ◽  
Atmospheric Corrosion ◽  
Protective Layer ◽  
Humid Atmosphere ◽  
Water Condensation ◽  
Equimolar Composition ◽  
Aluminum Hydroxides ◽  
Daily Water ◽  
20 Nm

The application of mixed corrosion inhibitor (CI), which is an equimolar composition of oleoyl sarcosinate (SOS) and sodium flufenamate (SFF), for protection of D16 aluminum alloy from atmospheric corrosion has been studied. The polarization measurements used to assess the effectiveness of preliminary passivation of the alloy with solutions of SOS, SFF and their composition showed significant advantages of mixed CI. The XPS method was used to study features of CI adsorption on the surface of D16 alloy. It has been established that upon adsorption of SOS and SFF separately a monolayer is formed, firmly bonded to the alloy surface, thickness of which is not exceeding 2.6—3.2 nm. After the joint adsorption of these CI, the layer thickness reaches 12—20 nm. The composition of this layer includes a considerable amount of Al3+ ions (~20%) related to their compounds with SFF and SOS, as well as to aluminum hydroxides. A possible mechanism for the formation of such a protective layer is proposed. The results of corrosion tests in a humid atmosphere with daily water condensation on samples of D16 alloy confirmed the high protective ability of the mixed CI film.

scholarly journals Effect of Oxide Scale Microstructure on Atmospheric Corrosion Behavior of Hot Rolled Steel Strip

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 517
Author(s):  
Bin Sun ◽  
Lei Cheng ◽  
Chong-Yang Du ◽  
Jing-Ke Zhang ◽  
Yong-Quan He ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Oxide Scale ◽  
Corrosion Product ◽  
Corrosion Behavior ◽  
Corrosion Test ◽  
Atmospheric Corrosion ◽  
Corrosion Mechanism ◽  
Type I ◽  
Rust Layer ◽  
Hot Rolled

The atmospheric corrosion behavior of a hot-rolled strip with four types (I–IV) of oxide scale was investigated using the accelerated wet–dry cycle corrosion test. Corrosion resistance and porosity of oxide scale were studied by potentiometric polarization measurements. Characterization of samples after 80 cycles of the wet–dry corrosion test showed that scale comprised wüstite and magnetite had strongest corrosion resistance. Oxide scale composed of inner magnetite/iron (>70%) and an outer magnetite layer had the weakest corrosion resistance. The corrosion kinetics (weight gain) of each type of oxide scale followed an initial linear and then parabolic (at middle to late corrosion) relationship. This could be predicted by a simple kinetic model which showed good agreement with the experimental results. Analysis of the potentiometric polarization curves, obtained from oxide coated steel electrodes, revealed that the type I oxide scale had the highest porosity, and the corrosion mechanism resulted from the joint effects of electrochemical behavior and the porosity of the oxide scale. In the initial stage of corrosion, the corrosion product nucleated and an outer rust layer formed. As the thickness of outer rust layer increased, the corrosion product developed on the scale defects. An inner rust layer then formed in the localized pits as crack growth of the scale. This attacked the scale and expanded into the substrate during the later stage of corrosion. At this stage, the protective effect of the oxide scale was lost.

scholarly journals In-situ reactions and mechanical properties of 6061 aluminum alloy weld joint with SiCp by laser melting injection

2021 ◽  
Vol 203 ◽  
pp. 109538
Author(s):  
Boan Xu ◽  
Ping Jiang ◽  
Shaoning Geng ◽  
Yilin Wang ◽  
Jintian Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Weld Joint ◽  
Laser Melting ◽  
6061 Aluminum Alloy ◽  
In Situ Reactions ◽  
Alloy Weld

Effect of friction stirred Al-Fe-Si particles in 6061 aluminum alloy on structure and corrosion performance of MAO coating

2016 ◽  
Vol 304 ◽  
pp. 85-97 ◽  
Author(s):  
Ming-an Chen ◽  
Yan-chun Ou ◽  
You-hong Fu ◽  
Zai-hua Li ◽  
Jun-ming Li ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Performance ◽  
6061 Aluminum Alloy

scholarly journals Relationship between diameter of base material and heat input in friction welding of 6061 aluminum alloy.

2002 ◽  
Vol 52 (1) ◽  
pp. 7-11 ◽  
Author(s):  
Takeshi SAWAI ◽  
Koichi OGAWA ◽  
Hiroshi YAMAGUCHI ◽  
Hiizu OCHI ◽  
Yoshiaki YAMAMOTO ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Heat Input ◽  
Friction Welding ◽  
Base Material ◽  
6061 Aluminum Alloy

scholarly journals Static strength of friction welded joint of 6061 aluminum alloy to SUS304 stainless steel.

1996 ◽  
Vol 46 (10) ◽  
pp. 500-504 ◽  
Author(s):  
Hiizu OCHI ◽  
Koichi OGAWA ◽  
Yoshiaki YAMAMOTO ◽  
Shigeki HASHINAGA ◽  
Yasuo SUGA ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Welded Joint ◽  
Static Strength ◽  
6061 Aluminum Alloy ◽  
Sus304 Stainless Steel

Evolution of texture during hot rolling of aluminum borate whisker-reinforced 6061 aluminum alloy composite

2011 ◽  
Vol 528 (7-8) ◽  
pp. 3243-3248 ◽  
Author(s):  
S.C. Xu ◽  
L.D. Wang ◽  
P.T. Zhao ◽  
W.L. Li ◽  
Z.W. Xue ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Hot Rolling ◽  
Aluminum Borate ◽  
Alloy Composite ◽  
6061 Aluminum Alloy
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