Corrosive Wastes

corroSel swf

Corrosive wastes are acidic or alkaline (basic) wastes that can readily corrode or dissolve materials they come into contact with.

We measure corrosivity by either pH or the rate of steel corrosion:

pH When aqueous solution has a pH less than or equal to 2, or more than or equal to 12.5 it is considered corrosive.
Corrosive pH levels
  0  ≤2 5   10  ≥12.5 15 20
  When a non-aqueous solution mixed with an equal weight of water has a pH of less than 2 or greater than 12.5 it is considered corrosive. See exception for cementitious waste.
   
Rate of steel corrosion When a liquid corrodes steel at a rate greater than 6.35mm per year at a test temperature of 55 C (130F), it is considered corrosive.
Corrosion swf
  Average rate of corrosion per year = 6.64 mm
  If a non-liquid, when mixed with an equal weight of water, corrodes steel at a rate greater than 6.35 mm per year, it is considered corrosive.


Title 22 CCR 66261.22