Calculate average metal corrosion rate from weight loss, exposed surface area, material density and exposure time. Results are provided in mm/year, µm/year, mils/year and inches/year.
How do I calculate corrosion rate from weight loss? Convert weight loss into lost volume using density, divide by exposed surface area to obtain equivalent thickness loss, then normalize it to one year.
Why do I need surface area? The same mass loss represents different corrosion rates depending on whether it occurred over a small or large exposed surface.
Why is density required? Density converts the measured mass loss into an equivalent volume of metal removed.
Can I enter initial and final specimen weight? Yes. Switch the mass measurement option and the calculator will determine the weight loss automatically.
Can this calculate steel corrosion rate? Yes. Select the steel preset or enter the density appropriate for your specific material.
What is the difference between mm/year and mils/year? They are different thickness-rate units. One mil equals 0.001 inch, while 1 mm equals approximately 39.37 mils.
Does weight loss detect pitting? Weight loss provides an average corrosion penetration rate. A component can have severe localized pitting even when its average weight-loss rate is relatively low.
Can I use this for field corrosion inspection? It can help estimate average corrosion from coupon or mass-loss data. Actual field thickness loss should be assessed using appropriate inspection measurements and engineering procedures.