瑞士万通910 PSTAT mini 电化学工作站

910 PSTAT mini样本

910PSTAT mini是一款由计算机控制的便携式恒电位仪，可应用于电化学活性成分定量分析和电化学研发。配套的PSTAT软件简便直观，能提供各种主要的电化学测试技术。一次性丝网印刷电极经济高效，可以直接应用，无需任何前期准备。

腐蚀研究——氢渗透实验

Hydrogen permeation is a phenomenon that limits the practical use of high tensile strength steel alloys by introducing cracking hazards due to hydrogen penetration and hydrogen accumulation in the bulk of the alloy.

腐蚀研究——缓蚀剂

A corrosion inhibitor is a substance when added in a small concentration to an environment reduces the corrosion rate of a metal exposed to that environment. Inhibitors often play an important role in the oil extraction and processing industries where they have always been considered to be the first line of defence against corrosion.

腐蚀研究——PX1000测定临界点蚀温度

Critical pitting temperature (CPT) is the lowest temperature on the test surface at which stable propagating pitting occurs under specified test conditions indicated by a rapid increase beyond a set limit of the measured anodic current density of the specimen.

腐蚀研究——腐蚀的基础理论

Corrosion refers to a process that involves deterioration or degradation of metal. The most common example of corrosion is the formation of rust on steel. Most corrosion phenomena are of electrochemical nature and consist of at least two reactions on the surface of the corroding metal. One of the reactions is the oxidation (e.g., dissolution of iron) also referred to as the anodic partial reaction.other is a reduction reaction (e.g., reduction of oxygen), and is referred to as the cathodic partial reaction. The products of the electrochemical reactions can react with each other non-electrochemically to form the final product (e.g., rust). For example, the corrosion of iron to form rust proceeds according to the overall reaction:

腐蚀研究——腐蚀速率的测量

Electrochemical methods provide an alternative to traditional methods used to determine the rate of corrosion. Direct and quantitative determination of corrosion rates can be determined from simple electrochemical measurement like a linear sweep voltammetry (LSV).

腐蚀研究——测量极化电阻

In the previous application note, the procedure for estimating corrosion rates was outlined. The calculations were valid under the assumption that the corrosion reactions were under charge transfer control and that the mechanisms of the reactions were known. In real life, often, corrosion is a result of several reactions and it is not possible to a priori determine the reaction mechanism. In such cases Polarization Resistance, Rp, can be used to determine the resistance of the metal under investigation against corrosion.

腐蚀研究——等效电路模型

In recent years Electrochemical Impedance Spectroscopy or EIS has been successfully applied to the study of corrosion systems. EIS has been used effectively to measure the polarization resistance for corrosion systems and for the determination of corrosion mechanisms for systems where DC electrochemical methods have failed.