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Electrochemistry and RED-OX Reactions
Published in Armen S. Casparian, Gergely Sirokman, Ann O. Omollo, Rapid Review of Chemistry for the Life Sciences and Engineering, 2021
Armen S. Casparian, Gergely Sirokman, Ann O. Omollo
The listing is also referred to as the activity series of metals, since they indicate which metal is more likely, relative to another, to release its electrons, oxidize, and react. The reactions posted are sometimes referred to as half-cell reactions. For example, the metal lithium has the highest negative E° value, −3.045 V, while magnesium has an E° value of −2.363 V. Therefore, elemental lithium will oxidize and react more easily than elemental magnesium. The nonmetal fluorine has the highest positive E° value, +2.87 V, and is thus easiest to reduce, In other words, a large negative E° value means that the reactant is a good reducing agent, and a large positive E° value indicates a good oxidizing agent.
Green synthesis of zinc sulfide nanoparticles-organic heterocyclic polyol system as eco-friendly anti corrosion and anti-bacterial corrosion inhibitor for steel in acidic environment
Published in Green Chemistry Letters and Reviews, 2022
Reda Abdel Hameed, Mohamad Faride, Mohamad Othman, Bader Huwaimel, Saedah Al-Mhyawi, Ahmed Shamroukh, Freah Alshammary, Enas Aljuhani, Metwally Abdallah
Analytical techniques were used to compare the inhibition effect of both individual materials and mixed nanomaterial systems. Gasometrical or hydrogen evolution technique was based on the measurements of the volume of the evolved hydrogen during the corrosion reaction at different time intervals. When carbon steel or any active metals placed in the acidic environment upon the electrochemical reactivity series more active metal like iron replace hydrogen of the acid and the hydrogen was evolved in the form of hydrogen gas. The evolved hydrogen was measured using a gasometric system and used for the calculation of corrosion inhibition efficiency % I.E. in the present study the gasometrical technique was used for evaluation and comparison of the five prepared nanomaterials’ polyol system which was used as an inhibitor for steel in the 1.0 M H2SO4 acidic environment.
Evaluating electrochemical micromachining capabilities for industrial applications: A review
Published in Materials and Manufacturing Processes, 2023
Jitendra Singh, Rishi Kant, Anutosh Nimesh, Nitish Katiyar, Shantanu Bhattacharya
To prevent the ions from depositing, it is necessary to get rid of them just when they get into the electrolyte. This could be done upon the breakdown of electrolyte water into hydroxide ions which would neutralize the ions from the anode forming insoluble hydroxides, for example, take iron which is more reactive than hydrogen according to the electrochemical reactivity series, it forms a precipitate of ferric hydroxide. Further, this precipitate is carried away from the cathode and hence prevents them to get deposited. In addition, the current passing through the electrolyte remains the same since the electrolyte breakdown does not occur at an electrode surface. Figure 5 depicts the schematic diagram of ECM process where electrolyte breakdown takes place.