Potentiodynamic Polarization Measurement of Sn–8.5Zn–XAl–0.5Ga Alloy in 3.5% NaCl Solution

2006 ◽  
Vol 153 (8) ◽  
pp. B319 ◽  
Author(s):  
Udit Surya Mohanty ◽  
Kwang-Lung Lin
Keyword(s):  
Potentiodynamic Polarization ◽  
Polarization Measurement ◽  
Nacl Solution ◽  
Potentiodynamic Polarization Measurement

scholarly journals Calcium D-Pantothenate as Green Corrosion Inhibitor on Mild Steel in 240 ppm NaCl Solution

2019 ◽  
Vol 9 (2S2) ◽  
pp. 435-442
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Potentiodynamic Polarization ◽  
Density Functional ◽  
Electrochemical Impedance ◽  
Corrosion Current ◽  
Nacl Solution ◽  
Functional Theory ◽  
Vitamin B5 ◽  
Quantum Chemical Data

Corrosion inhibition of mild steel in 240 ppm NaCl solution using Calcium D-Pantothenate (Vitamin B5 ) as corrosion inhibitor is studied using electrochemical impedance, potentiodynamic polarization and weight loss studies. From the potentiodynamic polarization studies, icorr (corrosion current density) decreases with increasing the concentration of vitamin B5 (VB5 ). The CR (corrosion rate) decreases and the IE (inhibition efficiency) of VB5 increases on increasing the concentration of VB5 .Surface investigation using SEM, EDX spectra, UV-Vis, FTIR, electrochemical impedance, potentiodynamic polarization and adsorption isotherm parameter of VB5 in 240 ppm NaCl solution shows that VB5 can act asworthy corrosion inhibitors. Quantum chemical data obtained from density functional theory (DFT) calculations also agreed with the experimental outcomes.

scholarly journals Protection of Mild Steel Corrosion in Sulphuric Acid Environment Using Wheat Starch

2017 ◽  
Vol 10 ◽  
pp. 11-21 ◽  
Author(s):  
Simeon C. Nwanonenyi ◽  
Okoro Ogbobe ◽  
Emeka Emmanuel Oguzie
Keyword(s):  
Mild Steel ◽  
Metal Surface ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Measurement Techniques ◽  
Steel Corrosion ◽  
Polarization Measurement ◽  
Wheat Starch ◽  
Adsorption Parameters ◽  
Acid Environment

The corrosion of mild steel in 0.5 M H2SO4acid solution and the inhibition process by wheat starch (WS) was investigated using weight loss and potentiodynamic polarization measurement techniques respectively. Gravimetric results revealed that there is significant reduction in the corrosion rate of mild steel in the presence of inhibited solution compared to blank solution, and also the inhibition efficiency was found to depend on the concentration of the WS. Data on potentiodynamic polarization results confirmed that WS exhibited mixed type inhibition behaviour, though the cathodic effect was more pronounced. The mode of WS adsorption on the corroding metal surface followed Langmuir isotherm model. In addition, the trend of inhibition efficiency with temperature, activation energy and heat of adsorption parameters revealed a strong interaction between the WS constituents and the corroding metal surface, thus indicating that WS lowered the corrosion process by blanketing the mild steel surface through chemical adsorption mechanism. The mechanism of inhibition was discussed in the light of the chemical structure of starch.

Experiment Investigation for Design on the Sensitization-Dependent Passivation Characteristics of AL-6XN in 3.5% NaCl Solution

2021 ◽  
Vol 21 (7) ◽  
pp. 3984-3988
Author(s):  
Kwang-Hu Jung ◽  
Seong-Jong Kim
Keyword(s):  
Heat Treatment ◽  
Potentiodynamic Polarization ◽  
Treatment Time ◽  
Test Methods ◽  
Double Loop ◽  
Nacl Solution ◽  
Heat Treated ◽  
Cyclic Potentiodynamic Polarization ◽  
Degree Of Sensitization ◽  
Characteristic Values

The sensitization and passivation characteristics of AL-6XN heat-treated for up to 24 h at 800 °C were evaluated through double loop electrochemical potentiodynamic reactivation (2 M H2SO4 + 0.01 M KSCN +2 M NaCl solution) and cyclic potentiodynamic polarization (3.5% NaCl solution) test methods. Furthermore, the dependence between the characteristic values (Epit, Erep, and degree of sensitization) was discussed. The σ phase was precipitated at the intergranular and intragranular in AL-6XN at 800 °C. When the heat treatment time exceeded 1 hour, AL-6XN occurred rapid sensitization due to the precipitation of σ phase. In a 3.5% NaCl solution, the passivation characteristics of AL-6XN with sensitivity were very poor and depended much on the degree of sensitization.

Anticorrosion Behavior of ZnO Nanoparticles Coated on Mild Steel in NaCl Solution

2020 ◽  
Vol 20 (7) ◽  
pp. 4061-4068
Author(s):  
S. Subhasree ◽  
P. Anitha ◽  
K. Kannan ◽  
A. Ramachandran ◽  
J. J. Sheri ◽  
...  
Keyword(s):  
Mild Steel ◽  
Zno Nanoparticles ◽  
Electrochemical Impedance ◽  
Average Diameter ◽  
Polarization Measurement ◽  
Ocimum Sanctum ◽  
Nacl Solution ◽  
X Ray ◽  
Corrosive Solution ◽  
Nano Coating

This work focuses on the environment protected, ecological procedure by the combination of ZnO nanoparticles utilizing the extraction of Ocimum sanctum. The prepared nanoparticles are examined by different methods like Fourier-transform infrared spectroscopy (FTIR), X-ray Diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Energy Dispersive X-ray Analysis (EDAX). A systematic study has been made on the result of ZnO nano-coating for the corrosion behavior of mild steel. The ZnO nanoparticles of average diameter in the range 18–22 nm were coated on mild steel in nickel bath solution. The anticorrosion properties on the coated mild steel was carefully tested in 3.5% NaCl solution by performing potentio-dynamic polarization measurement and electrochemical impedance spectroscopy. Surface morphology of the coated mild steel immersed in corrosive solution was judged by using SEM with EDAX. The ZnO nano coating has shown a perfect protection against corrosion and the shielding capability is in the range between 86–95%. The incorporation of ZnO nanoparticles has upgraded the process of mild steel in all corrosion media are subjected to investigation.

The effect of an N-heterocyclic compound on corrosion inhibition of J55 steel in sweet corrosive medium

2019 ◽  
Vol 43 (16) ◽  
pp. 6303-6313 ◽  
Author(s):  
Ambrish Singh ◽  
K. R. Ansari ◽  
M. A. Quraishi ◽  
Savas Kaya ◽  
Priyabrata Banerjee
Keyword(s):  
Carbon Dioxide ◽  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Corrosion Inhibition ◽  
Heterocyclic Compound ◽  
Potentiodynamic Polarization ◽  
Corrosive Medium ◽  
Electrochemical Impedance ◽  
Nacl Solution

The corrosion inhibition behavior of a naphthoxazinone derivative 1-phenyl-1,2-dihydronaphtho[1,2-e][1,3]oxazin-3-one (PNO) on J55 steel in 3.5 wt% NaCl solution saturated with carbon dioxide was evaluated using weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization.

Electroless Nickel Plating on Copper Foil

2014 ◽  
Vol 926-930 ◽  
pp. 103-107
Author(s):  
Zuo Qin Tang ◽  
Su Rong Hu ◽  
Yin Chun Chao
Keyword(s):  
Corrosion Resistance ◽  
Potentiodynamic Polarization ◽  
Copper Foil ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Nacl Solution ◽  
Tribological Behaviour ◽  
Microhardness Tester

A pre-cleaning and an electroless nickel plating (EN-HP) were applied to copper foil to improve its tribological behaviour and corrosion resistance. The coating porosity was measured by the corrodkote, tribological behaviour was measured with microhardness tester and a CSM ball-on-disk tribometer, corrosion resistance was measured by potentiodynamic polarization in 3.5 wt.% NaCl solution. Matte nickel plating (mNi) and moderate compact Ni–P coating (EN-MP) were made as comparisons to EN-HP in those tests. By deposition of EN-HP, both coating porosity and tribological behaviour are greatly improved compared to mNi, and the corrosion resistance is distinctly ameliorated to the comparisons. Above research demonstrates that the copper foil with EN-HP coating is good underlay in assemblage of machine.

Passivity breakdown of 316L stainless steel during potentiodynamic polarization in NaCl solution

2016 ◽  
Vol 111 ◽  
pp. 720-727 ◽  
Author(s):  
Sara Al Saadi ◽  
Yongsun Yi ◽  
Pyungyeon Cho ◽  
Changheui Jang ◽  
Philip Beeley
Keyword(s):  
Stainless Steel ◽  
Potentiodynamic Polarization ◽  
316L Stainless Steel ◽  
Nacl Solution

scholarly journals Effect of Sr and Ti Addition on the Corrosion Behaviour of Al-7Si-0.3Mg Alloy

2017 ◽  
Vol 17 (2) ◽  
pp. 125-130 ◽  
Author(s):  
M. Uludağ ◽  
M. Kocabaş ◽  
D. Dışpınar ◽  
R. Çetin ◽  
N. Cansever
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Potentiodynamic Polarization ◽  
Corrosion Test ◽  
Corrosion Behaviour ◽  
Tensile Tests ◽  
Nacl Solution ◽  
Cyclic Potentiodynamic Polarization ◽  
Ti Addition

AbstractIn the present study, the corrosion behaviour of A356 (Al-7Si-0.3Mg) alloy in 3.5% NaCl solution has been evaluated using cyclic/potentiodynamic polarization tests. The alloy was provided in the unmodified form and it was then modified with AlTi5B1 for grain refinement and with AlSr15 for Si modifications. These modifications yield to better mechanical properties. Tensile tests were performed. In addition, bifilm index and SDAS values were calculated and microstructure of the samples was investigated. As a result of the corrosion test, the Ecorr values for all conditions were determined approximately equal, and the samples were pitted rapidly. The degassing of the melt decreased the bifilm index (i.e. higher melt quality) and thereby the corrosion resistance was increased. The lowest corrosion rate was founded at degassing and as-received condition (3.9x10-3mm/year). However, additive elements do not show the effect which degassing process shows.

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