Investigation on galvanic corrosion behaviors of CFRPs and aluminum alloys systems for automotive applications

2018 ◽  
Vol 70 (6) ◽  
pp. 1036-1043 ◽  
Author(s):  
Xiayu Wu ◽  
Jiakun Sun ◽  
Jiaming Wang ◽  
Yiming Jiang ◽  
Jin Li
Keyword(s):  
Aluminum Alloys ◽  
Galvanic Corrosion ◽  
Automotive Applications ◽  
Corrosion Behaviors

scholarly journals Effect of Laser Power on Microstructure and Micro-Galvanic Corrosion Behavior of a 6061-T6 Aluminum Alloy Welding Joints

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 3
Author(s):  
Huiling Zhou ◽  
Fanglian Fu ◽  
Zhixin Dai ◽  
Yanxin Qiao ◽  
Jian Chen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Laser Power ◽  
Galvanic Corrosion ◽  
Gas Metal Arc Welding ◽  
Immersion Test ◽  
Intermetallic Particles ◽  
Metal Arc Welding ◽  
Corrosion Behaviors ◽  
Welding Joints ◽  
Corrosion Pits

The 6061-T6 aluminum alloy welding joints were fabricated using gas metal arc welding (GMAW) of various laser powers, and the effect of laser power on the microstructure evolution of the welding joints was investigated. The corrosion behaviors of 6061-T6 aluminum alloy welding joints were investigated in 3.5 wt% NaCl solution using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results showed that the micro-galvanic corrosion initiation from Mg2Si or around the intermetallic particles (Al-Fe-Si) is observed after the immersion test due to the inhomogeneous nature of the microstructure. The preferential dissolution of the Mg2Si and Al-Fe-Si is believed to be the possible cause of pitting corrosion. When the laser power reached 5 kW, the microstructure of the welded joint mainly consisted of Al-Fe-Si rather than the Mg2Si at 2 kW. The relatively higher content of Al-Fe-Si with increasing in laser power would increase the volume of corrosion pits.

scholarly journals Microstructure and fatigue properties of extruded aluminum alloys 7046 and 7108 for automotive applications

2021 ◽  
Vol 14 ◽  
pp. 2970-2981
Author(s):  
C.S. Hattori ◽  
G.F.C. Almeida ◽  
R.L.P. Gonçalves ◽  
R.G. Santos ◽  
R.C. Souza ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Fatigue Properties ◽  
Automotive Applications

scholarly journals Crevice Corrosion Behaviors Between CFRP and Stainless Steel 316L for Automotive Applications

2019 ◽  
Vol 32 (10) ◽  
pp. 1219-1226
Author(s):  
Xia-Yu Wu ◽  
Jia-Kun Sun ◽  
Jia-Ming Wang ◽  
Yi-Ming Jiang ◽  
Jin Li
Keyword(s):  
Stainless Steel ◽  
Crevice Corrosion ◽  
Automotive Applications ◽  
Stainless Steel 316L ◽  
Corrosion Behaviors

RETRACTED: Fretting and galvanic corrosion behaviors and mechanisms of Co–Cr–Mo and Ti–6Al–4V alloys

Wear ◽  
2001 ◽  
Vol 249 (10-11) ◽  
pp. 883-891 ◽  
Author(s):  
Daxiong He ◽  
Tiancheng Zhang ◽  
Yinshun Wu
Keyword(s):  
Galvanic Corrosion ◽  
Corrosion Behaviors

Numerical Modeling of Galvanic Corrosion Behaviors on Uranium Surface

2013 ◽  
Vol 702 ◽  
pp. 140-144
Author(s):  
Ping An Shi ◽  
Hong Liang Zhou
Keyword(s):  
Numerical Simulation ◽  
Current Distribution ◽  
Galvanic Corrosion ◽  
Corrosion Current ◽  
Electrode Kinetics ◽  
Uniform Corrosion ◽  
Corrosion Rates ◽  
Ohmic Resistance ◽  
Circular Defect ◽  
Corrosion Behaviors

The Uranium and Titanium corrosion rates are described by a Tafel’s relationship, and the cathodic protection of Uranium is a function of a Wagner number. A numerical simulation of galvanic corrosion of Uranium surface under thin layer electrolyte is presented. The model considered that the effect of a circular defect and oxygen reduction and corrosion in the Uranium surface, the effect of electrolyte thickness and conductivity and defect radius on corrosion current distribution of Uranium with is investigated. The results shows that the corrosion rate at the center is non-uniform, and it could lead to the formation of a hemispherical-shaped pit. And the effect of radius is to increase the importance of the electrode kinetics relative to ohmic resistance, and to increase the potential difference between the center and edge of the Uranium surface, resulting in non-uniform corrosion current distribution.

Effects of Temperature on Galvanic Corrosion Behaviors of Super 13Cr and P110 Steel Couples in NaCl Solution

2014 ◽  
Vol 1033-1034 ◽  
pp. 829-833 ◽  
Author(s):  
Xiao Fei Yao ◽  
Wei Tian ◽  
Ling Wu
Keyword(s):  
Current Density ◽  
Corrosion Current Density ◽  
Galvanic Corrosion ◽  
Corrosion Current ◽  
Potential Difference ◽  
Nacl Solution ◽  
P110 Steel ◽  
Corrosion Behaviors ◽  
Effects Of Temperature ◽  
Increasing Temperature

Electrochemical methods were employed to investigate galvanic corrosion behaviors of super13Cr and P110 couples in NaCl solution at different temperature. Corrosion morphologies and products of the couples were analyzed by SEM, EDS and XRD. The results showed that there were potential difference distinctly between super 13Cr and P110 steel in NaCl solution at different temperature, when its contacted, galvanic corrosion of super 13Cr-P110 steel couples will occurred. P110 was accelerated to corrode as anode and super 13Cr was protected as cathode in the coupling. Super 13Cr-P110 steel couples could not be used as P110 without any protection in NaCl solution at 20 °C to 80 °C. Corrosion current density and galvanic corrosion of super13Cr-P110 steel couples increased with increasing temperature in NaCl solution, of which corrosion products are Fe3O4.

scholarly journals Corrosion Behaviors of the Eutectic Structure in Zn-Al-Mg Alloy Coated Steel in Chloride Containing Aqueous Environment

2020 ◽  
Vol 58 (9) ◽  
pp. 610-616
Author(s):  
Jae-Won Lee ◽  
Se-Young Oh ◽  
Bora Park ◽  
Min-Suk Oh ◽  
Sung Jin Kim
Keyword(s):  
Coating Layer ◽  
Early Stage ◽  
Galvanic Corrosion ◽  
Salt Spray ◽  
Eutectic Structure ◽  
Mg Alloy ◽  
Aqueous Environment ◽  
Corrosion Mechanism ◽  
Coated Steel ◽  
Corrosion Behaviors

To clearly understand the effect of the eutectic structure in the Zn-Al-Mg alloy coating on the corrosion behaviors in chloride containing aqueous environments, a bulk Zn-MgZn<sub>2</sub> sample was fabricated by diffusion bonding process, and a variety of experiments, such as electrochemical polarization and galvanic corrosion measurements, salt spray tests, and cyclic corrosion tests, were carried out. This study revealed that the corrosion potential values of MgZn<sub>2</sub> and Zn samples exposed to a 5 wt.% of NaCl solution were approximately -1.5 and -1 VSCE, respectively, and the MgZn<sub>2</sub> showed a higher corrosion current density than Zn at the early stage of corrosion. The continued dissolution of MgZn<sub>2</sub> phase from the eutectic structure in the coating layer provides not only sacrificial protection, but also environmental conditions for the co-formation of two types of corrosion products (simonkoleite (Zn<sub>5</sub>(OH)<sub>8</sub>Cl<sub>2</sub>·H<sub>2</sub>O) and hydrotalcite (ZnAl<sub>2</sub>(OH)<sub>6</sub>Cl<sub>2</sub>·H<sub>2</sub>O)) which have an inhibiting effect on the outer surface. The formation areas and kinetics of the two products on the coating surface were different, and they were greatly dependent upon the types of eutectic structures in the coating layer. Based on the results, a modified anti-corrosion mechanism of Zn-Al-Mg alloy coated steel sheet in chloride containing aqueous environment was proposed.

scholarly journals Effects of Titanium and Boron Additions with Cooling Rates on Solidification Behavior in Aluminum Alloys for Automotive Applications

2016 ◽  
Vol 57 (2) ◽  
pp. 193-200 ◽  
Author(s):  
JaeHwang Kim ◽  
DongHoon Nam ◽  
HooDam Lee ◽  
KyungMoon Lee ◽  
TaeGyu Lee ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Automotive Applications ◽  
Solidification Behavior ◽  
Cooling Rates
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