Corrosion is one major factor for high maintenance cost and premature equipment failures. Life prediction of structural and functional performance of materials is vital to safe, reliable and effective operation of aircraft, ships, bridges, buildings, and other infrastructural systems. Determination of early signs of corrosion and corrosion-assisted damage is essential to life prediction and corrosion prevention. It helps cut down major repairs and catastrophic losses. Use of sensors to find corrosion is the best option by which early detection and monitoring is possible. Corrosion Sensors, Corrosion Detectors and Corrosion Monitoring Systems are being more popular these days as they can be used to increase the product life and lessen the maintenance cost of metallic structures.

Different Types of Corrosion

  • Uniform Corrosion
  • Concentration Cell Corrosion.
  • Intergranular Corrosion
  • Atmospheric Corrosion
  • Erosion Corrosion
  • Fretting Corrosion
  • Dealloiyng Corrosion
  • Formicary Corrosion
  • Microbiological Corrosion
  • Galvanic Corrosion or Bimetallic Corrosion
  • Pitting Corrosion – Crevice Corrosion
  • Stress Corrosion Cracking
  • Cavitation Corrosion
  • Hydrogen Embrittlement Corrosion
  • Immunity Corrosion
  • Corrosion Fatigue

Various Types of Corrosion Sensors

There are several different types of corrosion sensors. Again, there are likely far more than those I am about to list, but at least these will give you an idea their application and uses:

  • Electrical Resistance (ER) Corrosion Sensors – Resistance corrosion probe is a small piece of metal is exposed to the fluid. this probe is connected to a electronic device that calculate the reduction of resistance of the probe due to corrosion and calculate the corrosion rate. ER Corrosion Sensors do indicate cumulative damage for uniform corrosion processes, but these sensors require a physical connection to obtain a measurement.
  • Linear Polarization Resistance (LPR) Corrosion Sensors – LPR corrosion probes measure the polarization of an electrode and extrapolate the corrosion rate.
  • Optical Fiber Corrosion Sensors (OFCS) based on laser light reflection
  • Electrochemical Corrosion Sensors – Electrochemical Corrosion Sensors measure corrosion by Electrochemical noise
  • Corrosion Sensors for Engine Oils – Sensor monitoring corrosion effects of lubrication, which relates corrosive material loss of thin metal films to an increase in resistance.
  • Coating and Paint Condition Monitoring Corrosion Sensors
  • Electrochemical Bimetallic Galvanic Corrosion Sensor
  • Reinforced Concrete Corrosion Wireless Monitoring Sensor System – Corrosion of reinforcement steel is on of the main durability issues for concrete structures, especially in coastal areas and in countries where de-icing salt is regularly used.
  • Corrosion Sensors for Detecting Graphitization of Cast Iron in Water – Graphitic corrosion, or graphitization, occurs when the metallic constituents of gray iron are selectively removed or converted into corrosion products.
  • Intelligent Corrosivity Sensor (ICS) – Wireless and autonomous corrosion sensor that determines early signs of expected hidden corrosion.
  • Real-Time Corrosion Measurement Transmitters that use wireless sensor networks
  • Multielectrode Array Sensor (MAS) Corrosion Probe
  • Localized Corrosion Monitoring System
  • Natural Gas Pipeline Internal Corrosion Monitoring System
  • Corrosion Coupons & Corrosion Probes – Corrosion Coupon or Probe is a piece of metal exposed to the environment and then extracted and the loss of weight is measured to calculate the corrosion rate.
  • UT Thickness Mat Corrosion Sensor – A small corrosion sensor attached to the external surfaces of an equipment. they read the thickness of the metal and calculate the corrosion rate.