Study of Erosion-Corrosion of Stainless Steel, Brass and Aluminum by Open Circuit Potential Measurements

Kabir, Kazi Bayzid; Mahmud, Iqbal

doi:10.3329/jce.v25i0.7234

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…When the concentration of DAN or DBN reached 1 mM, the lowest I corr values of 63.6 µA·cm −2 and 33.5 µA·cm −2 were obtained, and the inhibition efficiency achieved 97.77% and 98.83%, respectively. Generally, a compound is considered to anodic or cathodic type when the displacement in E corr is greater than 85 mV; otherwise, inhibitor is considered as a mixed type [25]. For DAN and DBN, the E corr values shift towards more a negative direction compared with the blank solution, but the change is not significant when the maximum displacement of E corr values is 10.9 mV, which indicated that DAN and DBN belonged to mixed-type inhibitors, mainly inhibiting the cathodic processes.…”

Section: Potentiodynamic Polarizationmentioning

confidence: 99%

The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution

Zhao

Tang

Dang

et al. 2017

Metals

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Abstract:Two environmental friendly triazinedithiol inhibitors 6-diallylamino-1,3,5-triazine-2,4-dithiol monosodium (DAN) and 6-dibutylamino-1,3,5-triazine-2,4-dithiol monosodium (DBN) were synthesized and their corrosion inhibition for aluminum alloy in a 1 M HCl solution was studied using weight loss methods, electrochemical measurements, and scanning electron microscopy (SEM) techniques. The inhibition efficiency of both DAN and DBN improved with increases in inhibitor concentration but decreased with increases in temperature. Results from potentiodynamic polarization and EIS showed that the corrosion inhibition efficiency of DAN and DBN was excellent. The adsorption of inhibitors on the aluminum alloy surface followed Langmuir adsorption isotherms. Morphology observation revealed that the aluminum alloy was greatly protected by these triazinedithiol inhibitors. Further, density functional theory (DFT) was used to investigate the relationships between molecular structural and inhibition efficiency.

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Section: Potentiodynamic Polarizationmentioning

confidence: 99%

The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution

Zhao

Tang

Dang

et al. 2017

Metals

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“…As a result, flow increases the rate of reduction reaction on the surface, as well as enhances the anodic reaction leading, under some conditions, to the growth of a passive film. Consequently, in theory, only insignificant changes in potential can be observed [ 41 ]. This suggests that the electrolyte flow should not alter the OCP obtained under static conditions.…”

Section: Resultsmentioning

confidence: 99%

Accelerated corrosion of low carbon steel by oscillatory acidic streams generated with a bio-inspired claw device

Godínez,

Montoya-Rangel,

Montoya

2024

PLoS ONE

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A mechanical device inspired by the pistol shrimp snapper claw was developed. This technology features a claw characterized by a periodic opening/closing motion, at a controlled frequency, capable of producing oscillating flows at transitional Reynolds numbers. An innovative method was also proposed for determining the corrosion rate of carbon steel samples under oscillating acidic streams (aqueous solution of HCl). By employing very-thin carbon steel specimens (25 μm thickness), with one side coated with Zn and not exposed to the stream, it became possible to electrochemically sense the Zn surface once the steel sample was perforated, thus providing the average dissolution rate into the most relevant pit on the steel surface. Furthermore, a laser light positioned beneath the metallic sample, along with a camera programmed to periodically capture images of the steel surface, facilitated the accurate counting of the number of newly formed pits. The system consisting of the thin steel sample and the Zn coating can be seen as a type of corrosion sensor. Furthermore, the proposed laser illumination method allows corroborating the electrochemical detection of pits and also establishing their location. The techniques crafted in this study pave the way for developing alternative corrosion sensors that boast appealing attributes: affordability, compactness, and acceptable accuracy to detect in time and space localized damage.

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“…In the OCV measurements, the trends were similar for the three AlCrFe 2 Ni 2 samples, that is, the potential increased with time, but the values recorded for the arc-melted material were less negative than those recorded for both cast ones. Numerous spikes on the OCV curves generally reflect local phenomena (pitting), such as damage of a protective layer by ions in the solution (Kabir and Mahmud, 2011). Polarization resistance describes the ability to resist the electron transfer from one phase to another.…”

Section: Discussionmentioning

confidence: 99%

Corrosion of Al(Co)CrFeNi High-Entropy Alloys

et al. 2020

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High-entropy alloys, AlCrFe 2 Ni 2 Mo x (x 0.00, 0.05, 0.10, and 0.15), AlCoCrFeNi, and two quinary alloys with compositions close to its face-centered cubic and body-centered cubic component phases, are tested for corrosion resistance in 3.5 wt% NaCl. The materials with different microstructure produced by arc melting or ingot metallurgy are evaluated by several electrochemical techniques: measurements of open circuit voltage, cyclic potentiodynamic polarization, and electrochemical impedance spectroscopy. Microstructure, surface topography, and composition are systematically characterized by scanning electron microscopy and energy-dispersive x-ray spectroscopy. The results indicate that minor additions of Mo positively affect corrosion resistance of the AlCrFe 2 Ni 2 alloy by hampering pit formation. The face-centered cubic phase in the equimolar alloy, AlCoCrFeNi, is proved to exhibit more noble corrosion potential and pitting potential, lower corrosion current density and corrosion rate than the body-centered cubic phase. Overall behavior of the investigated alloys is influenced by the manufacturing conditions, exact chemical composition, distribution of phases, and occurrence of physical defects on the surface.

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Study of Erosion-Corrosion of Stainless Steel, Brass and Aluminum by Open Circuit Potential Measurements

Cited by 6 publications

References 8 publications

The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution

The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution

Accelerated corrosion of low carbon steel by oscillatory acidic streams generated with a bio-inspired claw device

Corrosion of Al(Co)CrFeNi High-Entropy Alloys

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