Korrosjonsmålere

Korrosjonsmålere are instruments used to measure the rate of corrosion of a material. Corrosion is a natural process that degrades materials, typically metals, through chemical or electrochemical reactions with their environment. Understanding and quantifying corrosion rates is crucial in various industries, including oil and gas, chemical processing, and civil engineering, to ensure structural integrity, predict material lifespan, and optimize maintenance schedules.

There are several types of korrosjonsmålere, each employing different principles. Electrochemical methods are very common. These include linear polarization resistance (LPR), which measures the resistance to a small applied voltage to determine corrosion current, and electrochemical impedance spectroscopy (EIS), which analyzes the material's response to a range of alternating current frequencies. Another method is galvanic corrosion monitoring, where a reference electrode made of the same or a similar material is placed in contact with the structure to measure the electrical potential difference indicative of corrosion.

Other types of korrosjonsmålere include weight loss coupons, which are metal samples exposed to the corrosive environment for a specific period and then weighed to determine the mass lost due to corrosion. Ultrasonic thickness gauging can also indirectly indicate corrosion by measuring the reduction in material thickness over time. The choice of korrosjonsmåler depends on factors such as the type of material, the corrosive environment, the required accuracy, and cost considerations. Regular monitoring with these devices helps prevent catastrophic failures and extends the service life of critical infrastructure and equipment.