Wet abrasion resistance
The ability of a surface to resist material loss when abrasive particles are carried in a liquid. It is not dry abrasion with water added: particle velocity and angularity weigh more heavily, and corrosion of the substrate frequently runs in parallel with the mechanical loss.
Wet and dry abrasion are measured by different experiments, which is why quoting one figure against the other compares nothing. ASTM G75 produces a slurry abrasion response under a carried-particle condition; the dry sand/rubber wheel methods produce a number under a different one. A supplier quoting the test that favours its own family is not being dishonest, but the two numbers are not interchangeable.
The practical consequence in slurry service is that the mechanical figure is rarely the deciding variable. Corrosion often runs alongside the abrasion, and the repairability of the lining inside the outage the plant actually gets usually settles the choice before any laboratory number does.
Sources and references
- StandardASTM G75-15(2021), Standard Test Method for Determination of Slurry Abrasivity (Miller Number) and Slurry Abrasion Response of Materials (SAR Number)ASTM International · accessed September 7, 2026