μm/yr\mu\text{m/yr}

micrometer per year

Corrosion rateexact by definition

The micrometre per year is exactly 1e-6 m/yr by decimal prefix, and it is the unit for the very low rates found on passivated stainless steel, on well-inhibited closed loops, and in atmospheric corrosion studies. It is also convenient because 25.4 μm/yr is exactly 1 mil per year, making the mental conversion straightforward.

1 μm/yr\mu\text{m/yr} 0.001 mm/yr\text{mm/yr}

One micrometer per year in every corrosion rate unit

1,000nanometer per year (nm/yr)
1micrometer per year (μm/yr)this unit
0.0393701mil per year (mpy)
0.001millimeter per year (mm/yr)
0.0000393701inch per year (in/yr)
0.000001meter per year (m/yr)