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.

Exfoliation corrosion of aluminum alloy AA7075 examined by electrochemical impedance spectroscopy

2004 ◽  
Vol 55 (1) ◽  
pp. 18-23 ◽  
Author(s):  
F.-H. Cao ◽  
Z. Zhang ◽  
J.-F. Li ◽  
Y.-L. Cheng ◽  
J.-Q. Zhang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Exfoliation Corrosion

Investigation of corrosion behavior of polypyrrole-coated Ti using dynamic electrochemical impedance spectroscopy (DEIS)

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 80275-80285 ◽  
Author(s):  
Bhavana Rikhari ◽  
S. Pugal Mani ◽  
N. Rajendran
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Simulated Body Fluid ◽  
Corrosion Behavior ◽  
Body Fluid ◽  
Electrochemical Impedance ◽  
Sbf Solution ◽  
Dynamic Electrochemical Impedance Spectroscopy

In the present work, dynamic electrochemical impedance spectroscopy (DEIS) was used to investigate the corrosion behavior of polypyrrole (PPy)-coated titanium (Ti) in simulated body fluid (SBF) solution.

Evaluation of the corrosion behavior of a TiN-coated 316L SS bipolar plate using dynamic electrochemical impedance spectroscopy

2018 ◽  
Vol 42 (17) ◽  
pp. 14394-14409 ◽  
Author(s):  
S. Pugal Mani ◽  
Bhavana Rikhari ◽  
Perumal Agilan ◽  
N. Rajendran
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Fuel Cell ◽  
Impedance Spectroscopy ◽  
Corrosion Behavior ◽  
Proton Exchange Membrane ◽  
Electrochemical Impedance ◽  
Bipolar Plate ◽  
Proton Exchange ◽  
Exchange Membrane ◽  
Dynamic Electrochemical Impedance Spectroscopy

In the present investigation, the corrosion behavior of TiN-coated 316L SS was evaluated for use in a proton-exchange membrane fuel cell using dynamic electrochemical impedance spectroscopy (DEIS).

Studies on Corrosion Behavior of S-165 and HP Supermartensitic Stainless Steels in Cl- Environment

2011 ◽  
Vol 695 ◽  
pp. 425-428
Author(s):  
Duo Wang ◽  
De Ning Zou ◽  
Chang Bin Tang ◽  
Kun Wu ◽  
Huan Liu
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Corrosion Behavior ◽  
Stainless Steels ◽  
Potentiodynamic Polarization ◽  
Electrochemical Impedance ◽  
Polarization Curves ◽  
Chemical Compositions ◽  
Pitting Potential ◽  
Potentiodynamic Polarization Curves

Supermartensitic stainless steel grades are widely used in oil and gas industries to substitute duplex and super duplex stainless steels these years. In this paper the corrosion behavior of supermartensitic stainless steels with different chemical compositions, S-165 and HP, was investigated in Cl-environment. All the samples were treated by quenching at 1000 °C followed by tempering at 630 °C for 2h. After heat treatment, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) were determined on both kinds of samples. Polarization curves shows that the metastable pitting nucleuses were formed in passive area and the Cr content is the most important factor leading to the differences of pitting potential. The potentiodynamic polarization curves were conducted at various NaCl contents (5000, 15000 and 35000 ppm) and emphasized the need to account for the Cl-sensitivity of samples under corrosion environment. The results show that, the pitting potential decrease with the increase of chloride contents. The behavior of passive film was analyzed by electrochemical impedance spectroscopy.

EIS Research of AW-7020 Alloy Joints Welded by FSW

2013 ◽  
Vol 199 ◽  
pp. 412-417 ◽  
Author(s):  
Krzysztof Dudzik ◽  
Adam Charchalis
Keyword(s):  
Aluminum Alloy ◽  
Electrochemical Impedance Spectroscopy ◽  
Friction Stir Welding ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
New Technology ◽  
Electrochemical Corrosion ◽  
Signal Amplitude ◽  
Corrosion Properties ◽  
Friction Stir

The results of corrosion properties research of aluminum alloy AW 7020 (AlZn5Mg1) welded by friction stir welding FSW were presented. Friction Stir Welding (FSW) a new technology can be successfully used for butt welding of different types of aluminum alloy sheets. In the article the parameters for friction stir welding of sheets made of AlZn5Mg1 (7020) alloy was presented. The study was carried out in accordance with the requirements of the ASTM G 106. EIS measurement was performed in three electrode system in an artificial seawater (3.5% NaCl). Impedance studies were carried out at the corrosion potential. Changed voltage signal amplitude in the range ± 10 mV and frequency range of changes was as follows: 100 kHz - 0.1 Hz. Atlas 0531 EU & IA potentiostat was used for studies. The results of electrochemical impedance spectroscopy are presented in the form of parameters characterizing the corrosion process. Obtained results were statistically analyzed. The electrochemical impedance spectroscopy studies have shown that the joint welded by FSW has better electrochemical corrosion resistance than the native material - AW-7020 alloy. Original value are received results of the corrosion properties of new method friction stir welded AlZn5Mg1 alloy compared with the native material.

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