Definition - What does Corrosion Detection mean?
Corrosion detection is the process of determining factors that cause corrosion or rust on materials once subjected to the normal atmospheric conditions. This is essential for determining the materials' ability to withstand the existing environmental factors.
Corrosion detection is vital in identifying the strength of materials before use in building, construction or any other processes. Through corrosion detection, it is possible to detect the strength and durability of the products.
Corrosion detection is also known as corrosion discovery.
Corrosionpedia explains Corrosion Detection
There are three common ways of detecting corrosion. These are:
Thermography offers a fast, non-contact method for the detection of corrosion. The process is based on using thermal differences between the material and defects within it to create an image of discontinuities like corrosion. It has proven capability to detect any corrosion, even under paint without the paint's removal. Moreover, advances in algorithms and commercial instrumentation, mainly for thermal wave techniques, have significantly enhanced its field applications. This method can easily detect the level of corrosion in any material. The reflections that are produced from the thermal waves determine the corrosion rate/potential. The higher the reflection rate, the higher the rate of corrosion.
2. Eddy Currents
An eddy current method is another prime method of corrosion detection in materials with electrical conductivity. A probe coil is used to detect the material's ability to resist corrosion, especially in response to induced eddy currents. The higher the rates of eddy currents induced to the material, the higher the rate of corrosion detection.
3. Ultrasonic Confidence
In ultrasonic inspection the ability to detect as well as quantify corrosion in field applications requires the disassembly of systems and testing in water baths. The results of several tests have indicated that the detection of corrosion on many metal alloys of varying in thickness was useful above 10% metal loss. This is one of the most accurate methods of corrosion detection.