Stern-Geary Corrosion Rate Calculator
Linear Polarization Resistance (LPR): Calculate Stern-Geary constant ($B$), corrosion current ($i_{corr}$), and annual metal penetration rate per ASTM G59 & G102.
LPR Resistance & Tafel Slopes
Alloy Metallurgy (ASTM G102)
Corrosion Rate Analysis
Corrosion Rate ($CR$)
-- mm/year
Rate in mpy: -- mils/yr
Corrosion Current ($i_{corr}$)
-- µA/cm²
Stern-Geary B: -- mV
NACE Severity Classification
--
Standard industrial assessment
Mass Loss Rate
-- g/(m²·day)
Current: -- mA/m²
LPR Principles:
• $i_{corr} = \frac{B}{R_p}$, where $B = \frac{\beta_a \beta_c}{2.303 (\beta_a + \beta_c)}$. Typical $B \approx 15$–$35$ mV.
• ASTM G102 conversion: $1$ $\mu\text{A/cm}^2 \approx 0.0116$ mm/year for carbon steel ($EW=27.92, \rho=7.85$).
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