After-rust
After-rust is a term that is often used in the context of certain forms of art and design, particularly referring to a creative movement or aesthetic focus that deals with the themes of decay and the transformative qualities of materials. It's not a universally defined term, but similar concepts can be found in contemporary art and design.
Amalgamated zinc
Amalgamated Zinc, often referred to simply as Amalgamated Zinc Ltd (AZL), was a major mining company in Australia, primarily known for its production of zinc and lead. The company was involved in various mining operations, including the mining, smelting, and refining of zinc and lead ores.
Anion-exchange membrane
An anion-exchange membrane is a type of semi-permeable membrane that is designed to selectively allow anions (negatively charged ions) to pass through while blocking cations (positively charged ions). These membranes are typically composed of polymer materials that are chemically modified to contain positively charged functional groups, which attract and hold anions in the surrounding solution.
Anson equation
The Anson equation, often referred to in the context of solution behavior and thermodynamics, typically describes the relationship between the activities of solutes in a solution and their concentrations. It's particularly relevant in the study of electrolyte solutions. However, it's important to note that the term "Anson equation" is not widely known or standardized in the scientific literature as compared to other equations in thermodynamics and chemistry.
Antimony electrode
An antimony electrode is an electrochemical sensor typically used for measuring the concentration of specific ions, particularly in the field of analytical chemistry. It is commonly utilized in conjunction with ion-selective electrodes (ISEs) and potentiometric measurements. ### Characteristics 1. **Material Composition**: The electrode is made from antimony, a semimetal that exhibits specific electrochemical properties.
Auxiliary electrode
An auxiliary electrode, also known as a counter electrode, is a component used in electrochemical cells and various electrochemical reactions. Its primary function is to provide a surface on which a complementary half-reaction can occur. In many electrochemical setups, reactions at the working electrode (where the primary electrochemical reaction takes place) generate an electric current, and the auxiliary electrode serves to balance this current by facilitating electron flow through the electrochemical system.
Betts electrolytic process
The Betts electrolytic process, also known as the Betts method, is an electrolytic refining process used primarily for the extraction and purification of lead. It was developed by the American engineer, chemist, and inventor William Betts in the early 20th century.
Bjerrum defect
A Bjerrum defect refers to a type of point defect in ionic crystals, specifically concerning the arrangement and behavior of ions within the crystal lattice. It is named after the Danish physicist Niels Bjerrum, who studied such defects in detail. In ionic crystals, a Bjerrum defect typically arises due to a pair of neighboring ions, where one ion is missing (vacancy), and an adjacent ion becomes charged (often referred to as a "half" defect).
Carbon paste electrode
A carbon paste electrode (CPE) is an electrochemical sensor that is widely used in various applications, including analytical chemistry, electrochemical studies, and environmental monitoring. It is made by mixing a carbon-based material, typically powdered graphite or graphite particles, with a suitable binder (such as a polymer or oil) to form a paste. This paste is then applied to a conductive substrate, often a metal rod or electrode, to form the working surface of the electrode.
Castner process
The Castner process, also known as the Castner method, is an industrial chemical process used to produce sodium hydroxide (NaOH) from sodium carbonate (Na2CO3) using sodium metal and water. The process involves the following key steps: 1. **Sodium Carbonate Reduction**: The process begins with the reduction of sodium carbonate by sodium metal. This typically occurs at high temperatures.
Cathodic modification
Cathodic modification, often referred to in the context of electrochemistry and materials science, involves the alteration of the surface properties of a material through a cathodic (reduction) process. This technique can be applied to a variety of substrates, including metals, alloys, and coatings, with the goal of improving specific characteristics such as corrosion resistance, adhesion, and conductivity.
Caustic embrittlement
Caustic embrittlement is a type of material degradation that occurs in metals, particularly in steel, due to exposure to high pH alkaline environments, often involving caustic substances like sodium hydroxide (NaOH). This phenomenon is especially relevant in the context of boiler systems and other industrial equipment where caustic materials might be present.
Cell notation
Cell notation, also known as electrochemical cell notation or shorthand notation, is a way to represent an electrochemical cell, including its components and processes, in a standardized format. It provides a concise and systematic way to describe the different parts of an electrochemical cell, such as the anode, cathode, and the electrolyte involved in the reaction.
Cellulose electrode
A cellulose electrode is a type of electrode that is made primarily from cellulose, a natural polymer found in the cell walls of plants. Cellulose is abundant, biodegradable, and non-toxic, making it an attractive material for various applications in electrochemistry and environmental science. Cellulose electrodes can be used in different contexts, such as: 1. **Sensors:** Cellulose electrodes can be developed for use in biological or chemical sensors, where they can help detect specific substances or changes in the environment.
ChemElectroChem
ChemElectroChem is a scientific journal that focuses on the field of electrochemistry and its applications in chemistry. It is part of the "Chem" family of journals and is published by Wiley-VCH. The journal emphasizes original research articles, reviews, and communications that cover a wide range of topics related to electrochemistry, including fundamental studies, practical applications, and interdisciplinary research that connects electrochemistry with other areas of chemistry and materials science.
The copper-copper(II) sulfate electrode is a type of reference electrode commonly used in electrochemistry. It consists of a copper metal electrode immersed in a saturated solution of copper(II) sulfate (CuSO₄). This electrode is popular because it provides a stable and reproducible electrochemical potential, making it useful in various applications, including corrosion studies and as a reference in potentiometric measurements.
Corrosion Science
Corrosion Science is a multidisciplinary field that focuses on the study of corrosion, which is the deterioration of materials—typically metals—due to chemical reactions with their environment. This degradation can result from various factors, such as moisture, oxygen, salts, acids, and other corrosive agents. The primary goal of corrosion science is to understand the mechanisms that drive these processes, to develop methods for preventing or mitigating corrosion, and to create materials that are more resistant to corrosion.
Corrosion loop
A corrosion loop, often referred to in the context of industrial processes and systems, is a setup used to study and manage corrosion in materials, particularly metals. The term can encompass various configurations, usually designed to simulate conditions in which corrosion might occur in real-world applications, such as pipelines, heat exchangers, or chemical processing equipment. ### Key Aspects of Corrosion Loops: 1. **Simulated Environment**: Corrosion loops typically mimic operational conditions found in specific industrial processes.
Corrosion mapping by ultrasonics is a non-destructive testing (NDT) technique used to identify and quantify corrosion within materials, particularly metals. This method employs ultrasonic waves to detect and assess the extent of corrosion damage in structures such as pipelines, storage tanks, and other equipment where corrosion is a concern. ### Key Components of Ultrasonic Corrosion Mapping: 1. **Ultrasonic Waves**: High-frequency sound waves are generated and transmitted into the material being tested.
Corrosion under insulation
Corrosion under insulation (CUI) is a type of corrosion that occurs on the surface of metal components that are insulated, typically in industrial settings. This phenomenon is particularly common in process plants, refineries, and chemical processing facilities where piping, valves, and other equipment are insulated to maintain temperature, save energy, or protect personnel from hot surfaces. ### Key Points about CUI: 1. **Causes**: CUI generally occurs due to moisture trapped under the insulation material.