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Corrosion Rate - NACE / ASTM G1

Uniform corrosion rate in mm/year from coupon weight loss - the standard NACE/ASTM G1 calculation used for cargo-tank and ballast-tank monitoring.

CorrosionNACECoupon
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Formula, assumptions, and limits

CR=87600ΔmAtρ\text{CR} = \frac{87600 \cdot \Delta m}{A \cdot t \cdot \rho}
SymbolMeaningUnit
Δm\Delta mMass lossg
AAExposed surfacecm²
ρ\rhoMetal densityg/cm³

Source: ASTM G1 / NACE SP0775

In short

Uniform corrosion rate in mm/year from coupon weight loss - the standard NACE/ASTM G1 calculation used for cargo-tank and ballast-tank monitoring.

Learn the theory Marine Cathodic Protection and Hull Coatings