Electrochemistry and Corrosion
Wikipedia delivers the following definition of corrosion: “Corrosion is a natural process, which converts a refined metal to a more chemically-stable form, such as its oxide, hydroxide, or sulfide. It is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment.”
Since electrochemical reactions are the cause for many corrosion processes, electrochemistry seems to be the appropriate means to study corrosion processes and mechanisms, and also to learn more about the prevention and monitoring of corrosion.
There is a long history of PalmSens products that are being used for corrosion research in the field and in the lab environment. The new EmStat Pico allows you to go even one step further. It is a small step to develop a dedicated Corrosion Monitor that can be installed on-site for long term measurements and monitoring and that can be controlled from a distance.
Millions of euro’s are spent on controlling and preventing corrosion. Protective coatings are available in many forms and they all work towards the same goal; lengthening the lifespan of components and products. Many coating are still measured by exposing them for months with salt spray.
The Rapid Electrochemical Assessment of Paint (REAP) allows within 24 hours to determine the Time To Failure (TTF). During REAP a series of measurements with multiple samples is performed and the long term stability is extrapolated. Electrochemical Impedance Spectroscopy (EIS) and cathodic disbonding are the central techniques for the REAP, which allows an estimation of the time to failure.