scholarly journals Study on Electrochemical Impedance Response of Sulfate Saline Soil

2019 ◽  
pp. 8611-8623
Author(s):  
Peng Shuquan ◽  
Keyword(s):  
Electrochemical Impedance ◽  
Saline Soil ◽  
Impedance Response

scholarly journals Sacrificial Dissolution of Zinc Electroplated and Cold Galvanized Coated Steel in Saline and Soil Environments: A Comparison

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 744
Author(s):  
Ameeq Farooq ◽  
Umer Masood Chaudry ◽  
Ahsan Saleem ◽  
Kashif Mairaj Deen ◽  
Kotiba Hamad ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Electrochemical Impedance ◽  
Saline Soil ◽  
Steel Substrate ◽  
Salt Spray ◽  
Steel Structures ◽  
Open Circuit ◽  
Cyclic Polarization ◽  
Transfer Resistance ◽  
Soil Solutions

To protect steel structures, zinc coatings are mostly used as a sacrificial barrier. This research aims to estimate the dissolution tendency of the electroplated and zinc-rich cold galvanized (ZRCG) coatings of a controlled thickness (35 ± 1 μm) applied via brush and dip coating methods on the mild steel. To assess the corrosion behavior of these coated samples in 3.5% NaCl and 10% NaCl containing soil solutions, open circuit potential (OCP), cyclic polarization (CP), and electrochemical impedance spectroscopy (EIS) tests were performed. The more negative OCP and appreciably large corrosion rate of the electroplated and ZRCG coated samples in 3.5% NaCl solution highlighted the preferential dissolution of Zn coatings. However, in saline soil solution, the relatively positive OCP (>−850 mV vs. Cu/CuSO4) and lower corrosion rate of the electroplated and ZRCG coatings compared to the uncoated steel sample indicated their incapacity to protect the steel substrate. The CP scans of the zinc electroplated samples showed a positive hysteresis loop after 24 h of exposure in 3.5% NaCl and saline soil solutions attributing to the localized dissolution of the coating. Similarly, the appreciable decrease in the charge transfer resistance of the electroplated samples after 24 h of exposure corresponded to their accelerated dissolution. Compared to the localized dissolution of the electroplated and brush-coated samples, the dip-coated ZRCG samples exhibited uniform dissolution during the extended exposure (500 h) salt spray test.

The Role of Hydroxide in the Electrochemical Impedance Response of Passive Films in Corrosion Environments

2006 ◽  
Vol 153 (3) ◽  
pp. B101 ◽  
Author(s):  
Román Cabrera-Sierra ◽  
M. A. Pech-Canul ◽  
Ignacio González
Keyword(s):  
Electrochemical Impedance ◽  
Passive Films ◽  
Impedance Response

scholarly journals An Enzymatic Multiplexed Impedimetric Sensor Based on α-MnO2/GQD Nano-Composite for the Detection of Diabetes and Diabetic Foot Ulcer Using Micro-Fluidic Platform

Chemosensors ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 339
Author(s):  
Ashish Mathur ◽  
Hari Chandra Nayak ◽  
Shailendra Rajput ◽  
Souradeep Roy ◽  
Shalini Nagabooshanam ◽  
...  
Keyword(s):  
Diabetic Foot ◽  
Electrochemical Impedance ◽  
Glucose Monitoring ◽  
Foot Ulcer ◽  
Diabetic Foot Ulcer ◽  
Sample Volume ◽  
Internal Organs ◽  
Nano Composite ◽  
Impedance Response ◽  
Device Applications

Diabetes is widely considered as a silent killer which affects the internal organs and ultimately has drastic impacts on our day-to-day activities. One of the fatal outcomes of diabetes is diabetic foot ulcer (DFU); which, when becomes chronic, may lead to amputation. The incorporation of nanotechnology in developing bio-sensors enables the detection of desired biomarkers, which in our study are glucose and L-tyrosine; which gets elevated in patients suffering from diabetes and DFUs, respectively. Herein, we report the development of an enzymatic impedimetric sensor for the multi-detection of these biomarkers using an electrochemical paper-based analytical device (µ-EPADs). The structure consists of two working electrodes and a counter electrode. One working electrode is modified with α-MnO2-GQD/tyrosinase hybrid to aid L-tyrosine detection, while the other electrode is coated with α-MnO2-GQD/glucose oxidase hybrid for glucose monitoring. Electrochemical impedance spectroscopy has been employed for the quantification of glucose and L-tyrosine, within a concentration range of 50–800 mg/dL and 1–500 µmol/L, respectively, using a sample volume of approximately 200 µL. The impedance response exhibited a linear relationship over the analyte concentration range with detection limits of ~58 mg/dL and ~0.3 µmol/L for glucose and tyrosine respectively, with shelf life ~1 month. The sensing strategy was also translated to Arduino-based device applications by interfacing the µ-EPADs with miniaturized electronics.

Development of Printed-Type Corrosion Monitoring Sensor and Analysis of Electrochemical Impedance Response

2018 ◽  
Vol 165 (11) ◽  
pp. C743-C748 ◽  
Author(s):  
Akihiro Aiba ◽  
Naoto Fujii ◽  
Yoshinao Hoshi ◽  
Isao Shitanda ◽  
Masayuki Itagaki
Keyword(s):  
Electrochemical Impedance ◽  
Corrosion Monitoring ◽  
Impedance Response

Correlation of the nanostructure of the anodic layers fabricated on Ti13Nb13Zr with the electrochemical impedance response

2015 ◽  
Vol 94 ◽  
pp. 61-69 ◽  
Author(s):  
J.M. Hernández-López ◽  
A. Conde ◽  
J. de Damborenea ◽  
M.A. Arenas
Keyword(s):  
Electrochemical Impedance ◽  
Impedance Response
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