korrosionshastigheten

Korrosionshastigheten, literally translated as the corrosion rate, is a key metric used to quantify the rate at which a material, typically a metal, deteriorates due to chemical or electrochemical reactions with its environment. It is expressed in units such as millimetres per year or mil per year, indicating the thickness loss per unit time. The rate is determined by measuring the change in mass or dimensions of a specimen over a known exposure period. The most common laboratory technique is weight‑loss corrosion testing, where specimens are cleaned, weighed, exposed to a corrosive medium, rinsed, and weighed again. The linear corrosion rate is calculated by dividing the average thickness loss by the exposure time and converting to a standardized unit.

Other methods for determining korrosionshastigheten include electrochemical techniques such as potentiodynamic polarisation and electrochemical impedance spectroscopy, which can provide real‑time data on corrosion kinetics. In industrial settings, thickness gauges, ultrasonic measurements, and inline monitoring of structural integrity serve as practical alternatives to laboratory tests.

Factors that influence korrosionshastigheten encompass material composition, surface condition, temperature, humidity, presence of chloride ions, pH, and mechanical stresses. Understanding and controlling these variables allow engineers to predict service life, design protective coatings, and schedule maintenance. The metric is widely used in fields ranging from civil engineering and maritime construction to oil‑and‑gas pipeline management, reinforcing its role as a fundamental parameter in assessing material performance under corrosive conditions.