// multi-utility computation suite · offline · instant · precise
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eng.corrosion-rate Calculator
Calculates corrosion penetration rate (CPR) in mm/year and metal life from mass loss, exposed area, time, and material density. Corrosion allowance in piping design adds extra wall thickness — a CPR of 0.1 mm/year requires 5mm allowance for 50-year design life.
Inputs
W
Body or object weight. For health calculators, usually in kg or lbs.
A
Two-dimensional surface extent (m²). For complex shapes, break into simpler sub-shapes and sum.
D
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
T
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Results
mils per year (mpy)
Reference formula or conversion factor shown for context.
mm per year
Reference formula or conversion factor shown for context.
annual loss (cm)
The result expressed on a per-year basis.
rating
A standardised quality or risk rating on the applicable scale.