How can I convert corrosion rate between mils per year and mm/y?
1 mm = 1000 mils/25.4 mm = 39.37 mils. So, to convert a given corrosion rate from mm/y to mils/y, you must multiply by 39.37. and, to convert a given corrosion rate from mils/y to mm/y, you must divide by 39.37. Note: mils per year (mm/y) is often known as the mils penetration per year and abbreviated as mpy.