5000 mesh silty sand enhanced Cr enrichment in corrosion scale, leading to low corrosion rate and uniform corrosion.
1000 mesh silty sand deteriorated Cr enrichment in corrosion scale, leading to high corrosion rate and localized corrosion.
Anodic current of 3Cr steel reduced for 5000 mesh silty sand and increased for 1000 mesh silty sand.
Cr enrichment in corrosion scale of 3Cr steel was affected by separation effect of silty sand.