相关实验视频
Updated: May 20, 2025

08:43
Potentiodynamic Corrosion Testing
Published on: September 4, 2016
17.5K
两电极电化学扫描与微生物学影响的腐蚀检测中的三电极扫描,使用各种对应电极/伪参考电极材料
Lingjun Xu1, Adnan Khan2, Di Wang3
1Department of Chemical & Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, Athens 45701, USA.
Bioelectrochemistry (Amsterdam, Netherlands)
|May 17, 2025
概括
两电极 (2E) 设置与三电极 (3E) 设置一样可靠,用于测量生物膜测试套件中的微生物学影响腐蚀 (MIC) 率. 这一发现支持使用随时可用的反电极的2E设置.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 微生物学 微生物学
背景情况:
- 电化学测量对于研究微生物影响腐蚀 (MIC) 是至关重要的.
- 由于参考电极 (RE) 的脆弱性,传统的三电极 (3E) 设置对于生物膜/MIC测试套件是不切实际的.
- 两电极 (2E) 设置,利用对应电极 (CE) 作为伪参考电极 (p-RE),通常在这些套件中使用.
研究的目的:
- 为了比较2E和3E电化学扫描结果在微生物学影响腐蚀 (MIC) 研究中的可靠性.
- 评估和石墨作为MIC的2E设置中的对电极 (CE) 材料的性能.
- 评估CE/p-RE在生物膜/MIC测试套件中的替代材料的适用性.
主要方法:
- 使用2E和3E组合在玻璃细胞 (450毫升和10毫升) 中进行比较电化学分析.
- 实验涉及硫酸盐减少细菌 (SRB) 化和各种化学剂的注射试验.
- 腐蚀率是通过测量X65工作电极 (WE) 上的极化电阻转移来评估的.
主要成果:
- 2E扫描结果在反映SRB化和注射试验期间的腐蚀率方面显示出与3E扫描可比的可靠性.
- 在2E设置中的白金CE在化学注射后的极化阻力呈现一致的变化,类似于3E扫描.
- 微型细胞中的2E和3E扫描都准确地表明了SRB生物膜在3天的成熟度.
结论:
- 两电极 (2E) 设置是电化学生物膜/MIC测试的三电极 (3E) 设置的可行和可靠替代方案.
- 金和石墨是适合2E MIC研究的CE材料.
- 316L不钢,,和显示出作为生物膜/MIC测试套件的CE/p-RE材料的潜力.
相关概念视频
Electrodes: Overview
504
Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
504
Potentiometry: Types of Electrodes
450
Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
450
Interfacial Electrochemical Methods: Overview
211
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
211
Electrodeposition
539
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
539
Controlled-Potential Coulometry: Electrolytic Methods
118
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
The chosen potential...
118
Voltammetric Techniques: Linear-Scan (E vs Time)
289
Polarography is a classical voltammetric technique used to analyze electrochemical reactions. This method applies a linear potential sweep to a dropping mercury electrode (DME), and the resulting current is measured. A dropping mercury electrode is commonly used as the working electrode in polarography. It consists of a capillary tube filled with mercury, where the tiny droplet forms at the tip. This droplet continuously drops from the capillary, creating a new electrode surface for each...
289

