PROCESS ASSOCIATES
CORROSION RATE
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Corrosion Rate Conversion Factors

Corrosion Rate Conversion Factors

Simple chart to convert data between the most common corrosion units e.g  corrosion current (mA cm-2) , mass loss (g m-2 day-1) and penetration rates (mm y-1  and  mpy) for metals

mA cm-2 mm year-1 mpy g m-2 day-1
mA cm-2 1 3.28 M/nd 129 M/nd 8.95 M/n
mm year-1 0.306 nd/M 1 39.4 2.74 d
mpy 0.00777 nd/M 0.0254 1 0.0694 d
g m-2 day-1 0.112 n/M 0.365 /d 14.4 /d 1