in/yr
inch per year
Corrosion rateexact by definition
The inch per year is a thousand mils per year, exactly 0.0254 m/yr by definition of the international inch. It is rarely used for ordinary corrosion, which never approaches an inch a year, and appears mainly for erosion-corrosion, acid attack on unprotected steel, and rapid degradation cases where the mpy figure would run into the thousands.
Watch out: An inch per year is 1000 mpy and 25.4 mm/yr. Seeing this unit at all in a report is a signal that something has gone badly wrong, so confirm the units before acting: a figure meant as mpy and typed as in/yr is off by a factor of a thousand.
| 1 in/yr | 25.4 mm/yr |
Solvers that use corrosion rate