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Calcimator

Corrosion Rate Calculator

Calculate corrosion rate in mils per year (MPY) and mm/year from coupon weight loss test data, with life estimation.

Inputs

oz
oz
cm²
hours
g/cm³

Results

Corrosion Rate

4.56 MPY

Corrosion Rate

0.12 mm/yr

Weight Loss0.15 g
Estimated Life (6mm wall)51.8 years
How to Use This Calculator
  1. Weigh your corrosion coupon before exposure and enter the Initial Coupon Weight (g).
  2. After the exposure period, re-weigh and enter the Final Coupon Weight (g).
  3. Enter the Exposure Area (cm²) — the surface area of the coupon in contact with the corrosive environment.
  4. Set the Exposure Time (hours) and Material Density (g/cm³) for your alloy.
  5. Read Corrosion Rate in mils per year (MPY) and mm/year, plus Estimated Life for maintenance planning.

How the result changes with Initial Coupon Weight

Initial Coupon WeightCorrosion RateCorrosion Rate
1,00029,644.42 MPY752.97 mm/yr
3,500105,644.04 MPY2,683.36 mm/yr
6,500196,843.6 MPY4,999.83 mm/yr
9,000272,843.23 MPY6,930.22 mm/yr

What each input means

Initial Coupon Weight
Weight of the test coupon before exposure to the corrosive environment.
Final Coupon Weight
Weight of the test coupon after cleaning and drying post-exposure.
Exposure Area
Total surface area of the coupon exposed to the corrosive medium.
Exposure Time
Duration of exposure in hours (e.g., 720 hours = 30 days).
Material Density
Density of the coupon material (e.g., carbon steel = 7.87 g/cm³, stainless = 8.0).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Initial Coupon Weight = 25, Final Coupon Weight = 24.85, Exposure Area = 20, Exposure Time = 720 = 5 input(s) provided
  2. Calculate Corrosion Rate
    Corrosion Rate
    4.56 = 4.56
  3. Calculate Corrosion Rate
    Corrosion Rate
    0.116 = 0.116
  4. Calculate Weight Loss
    Weight Loss
    0.15 = 0.15
  5. Calculate Estimated Life
    Estimated Life
    51.8 = 51.8

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