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The electrochemical studies revealed that the corrosion kinetics at the metal cut-edges decreases during immersion, which could be due to formation of corrosion products on both steel and zinc surfaces.
Possible mechanisms of corrosion and corrosion inhibition are discu...
Both of these conditions can further accelerate corrosion by destroying the protectiveness of the corrosion film.
The inhibitors delay the onset of corrosion and reduce the rate of corrosion.
On metal surfaces they may induce or enhance corrosion.
Book ChapterDOI
01 Jan 2006
89 Citations
Corrosion has a serious impact on defense equipment.
The results emphasize the role of chloride concentration on localized corrosion.
This shows that the corrosion mechanism strongly depends on the electrolyte and its conductivity.
Contributions of wear-induced-corrosion and corrosion-induced-wear are significant especially at higher potentials.
Experimental results show that chlorates cause pitting corrosion, besides general corrosion.
The results showed that the mild electrochemical reactions and corrosion product film had a significant effect on determining the variable corrosion behavior of the coating.
from electrochemical and exposure corrosion tests show that useful gains in corrosion resistance are achieved.
This study demonstrates the capability of the CME to check numerous battery materials in a very short period of time, which allows to bring out the effect due to the corrosion of the material.
The data also show that inherent corrosion behavior depends upon the Tafel constants and the dc corrosion current, but it is independent of the dc corrosion potential.
It is identified that the modeling approach used in this work can be used to investigate the effect of corrosion on lead-acid battery performances.

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How does the incorporation of recycled aluminum affect the corrosion resistance of composite materials?
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The incorporation of recycled aluminum in composite materials can significantly impact their corrosion resistance. Studies have shown that introducing sustainable materials like fly ash and eggshells as reinforcements in aluminum matrix composites (AMCs) can enhance corrosion resistance. On the other hand, composite peening with ceramic particles like Al2O3 in aluminum can accelerate corrosion, particularly intergranular corrosion, compared to monolithic aluminum. Additionally, surface composites fabricated using friction stir processing with Mo particles reinforcement exhibit improved corrosion resistance, especially with higher Mo content and homogeneous distribution. Furthermore, aluminum matrix composites with SiC reinforcements prepared by powder metallurgy show varying corrosion rates based on the weight percentage of SiC, influencing the nucleation and growth of pits.
What are the applications of Mg alloys in implants?
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Magnesium (Mg) alloys are promising materials for biodegradable temporary implants due to their biodegradability, biocompatibility, and mechanical properties. However, their rapid corrosion rates in physiological environments hinder their widespread use. To address this, various coating methodologies have been explored, such as hydroxyapatite (HA) coatings and hybrid coatings with synthetic and natural polymers. These coatings enhance corrosion resistance, biocompatibility, and mechanical integrity of Mg alloys, making them suitable for biomedical applications. Surface modifications like plasma electrolytic oxidation (PEO) have also been successful in reducing corrosion rates and improving biological properties of Mg implants, promoting cell proliferation and extracellular matrix formation. Overall, the applications of Mg alloys in implants benefit from these coating and modification strategies to overcome corrosion challenges and enhance functionality.
Can ferrocyanide species detection in blood be used as a diagnostic tool for certain diseases or conditions?
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Ferrocyanide species detection in blood can serve as a diagnostic tool for various diseases or conditions. The combination of iron-cyanide chemistry with nanotechnology allows for ultrahigh sensitivity in whole blood analysis without pre-treatments. Additionally, the Anion‐Exchange Liquid Chromatography method validated on blood and other organs can accurately quantify cyanide levels, crucial in cases of poisoning. Furthermore, electrochemical methods like square wave voltammetry and differential pulse voltammetry, coupled with machine learning models, enable the quantification of ferrous ions in blood, showcasing high accuracy and sensitivity within seconds. These approaches highlight the potential of ferrocyanide species detection in blood as a valuable diagnostic tool for diseases related to iron levels, poisoning cases, and other health conditions.
How elementary students learn about electric current?
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Elementary students learn about electric current through various teaching approaches that aim to address their common misconceptions. To enhance understanding, a multimodal teaching sequence incorporating representation construction approaches has been proposed for primary school students. Research suggests that interacting with computational models based on the microscopic theory of electrical conduction can help 5th and 7th-grade students develop a deep understanding of electric current as an emergent process of flow. Hands-on learning experiences, such as circuit construction, allow students to visualize the flow of electrons through wires, bridging the gap between theoretical concepts and real-world applications. By engaging in activities that challenge their existing mental models and encourage multi-level explanations, elementary students can develop a comprehensive understanding of electric current.
What are the factors that contribute to corrosion on chromium electroplating?
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The factors contributing to corrosion in chromium electroplating include the presence of hexavalent chromium (Cr(VI)) in contaminated sites, the distribution of Cr(VI) in soil layers, the impact of Cr content and grain size on corrosion resistance in Cu-Cr coatings, the different mechanisms of hydrogen evolution on chromium surfaces at varying potentials, and the nanocrystallization and distribution of Cr affecting the corrosion resistance of Fe-20Cr coatings. Additionally, work environment factors like heat stress and wind direction can influence the levels of urinary chromium in informal electroplating workers, indicating a link between work conditions and chromium exposure. These factors collectively highlight the complex interplay between material composition, environmental contamination, and workplace conditions in determining the corrosion behavior of chromium electroplating.
How has Principal Component Analysis (PCA) been used to detect battery degradation in various types of batteries?
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What is the defintiion of hot corrosion?
4 answers
Hot corrosion is a form of chemical damage that occurs in materials exposed to hot gases above 400 °C without a liquid water phase, leading to surface degradation and reduced component life. It involves the deposition of corrosive species like sulfates onto hot components, causing destruction of the protective oxide scale. Hot corrosion mechanisms include thinning, erosion-corrosion, embrittlement, and localized attacks at grain boundaries. The removal of sulfur from fuel has been thought to mitigate hot corrosion, but the process is more complex, involving multiple sulfates and silicates from various sources like seawater entrained in the air. Hot corrosion significantly affects welded joints in high-temperature environments, such as gas turbines and boilers, leading to decreased service temperatures and potential failure. Coatings like Cr3C2-NiCr have been shown to protect against hot corrosion by forming protective oxide scales.
What are the different packaging concepts for steel coils?
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Various innovative packaging concepts for steel coils have been proposed in recent research. These concepts include systems with automated packaging processes, such as attaching different packaging materials to the inner and outer edges of the coil, wrapping the coil surfaces, and rotating the coil during packaging to enhance efficiency and reduce production costs. Additionally, there are systems designed to reduce physical strain on operators by incorporating lifting devices and rotating carrier roller assemblies for easier handling and improved working efficiency. Furthermore, there are auxiliary devices for dividing and packaging multiple steel plate coils simultaneously, preventing unwinding and facilitating the packaging bending operation for divided coils. Moreover, there are novel steel coil packaging materials made from a combination of various components to enhance strength, anti-tensile effects, and corrosion resistance.
What is the effect of algorithms on user attitudes towards social media?
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Algorithms on social media platforms have a significant impact on user attitudes by creating echo chambers and influencing opinions. These algorithms track user behavior, predict preferences, and provide personalized content, potentially leading to polarization. Users engaging with specific content, like pro-drinking posts, can influence their real-world behaviors, such as increased alcohol consumption. The personalization perception of algorithmic recommendations affects user attitudes positively, but also mediates perceived risks and biases, potentially hindering attitude changes. Overall, algorithms play a crucial role in shaping user attitudes on social media, emphasizing the need for ethical considerations and algorithmic accountability to promote healthier engagement and positive behavior changes.
What is the importance of critical micelle concentration?
4 answers
The critical micelle concentration (CMC) is a crucial parameter in surfactant science, indicating the point at which surfactant molecules aggregate to form micelles in solution. Determining the CMC is essential for understanding surfactant behavior, such as surface activity and self-assembly. Various methods, including surface tension measurements, fluorescence spectroscopy, and diffusion-based techniques, are employed to determine the CMC accurately. The CMC value is significant as it influences the efficiency of surfactants in applications like corrosion inhibition and membrane protein studies. Accurate CMC determination is vital for characterizing surfactants and their behavior in different environments, aiding in the development and optimization of surfactant-based products and processes.
How to measure a spin of an electron?
4 answers
To measure the spin of an electron, various methods and techniques are employed in experimental condensed matter physics. Macroscopic measurements utilize magnetomechanic, electromagnetic, modulation-type, and thermodynamic methods based on chemical potential variation. Local methods involve spin Hall effects and NV-centers for magnetic measurements. Multi-frequency microwave synchronization is used to measure all spin coupling resonance spectral lines, enhancing sensitivity in detecting weak magnetic fields. Another approach involves controlling atomic population distributions of ground states to determine electron spin polarization, decoded from optical depth in different transmissions of polarized lights. Additionally, a spin detector equipped with VLEED detectors allows for highly efficient detection of spin polarization in secondary electrons.