mill scale

noun
1.
scale1 (def 6b).
Origin
1875-80
Examples from the web for mill scale
  • Spot clean rusty areas to remove all rust and mill scale.
  • The above requirement does not apply to concrete form, mill scale and similar cleaning purposes.
  • Remove loose rust and mill scale and spatter, slag, or flux deposits.
  • Clean all surfaces of rust, mill scale, and apply prime coat of heat and corrosion resistant paint.
  • Clean the reinforcing bars of loose mill scale, loose rust, oil or other coatings that interfere with bonding.
  • High-pressure water can remove loose paint and rust, but will not efficiently remove tight paint or tight rust, or mill scale.