Corrosion Inhibitor Sticks Type RB are water-soluble sticks designed to release corrosion inhibitor and control corrosion from various sources. Corrosion Inhibitor Sticks Type C and RB are especially effective in preventing Hydrogen Sulfide corrosion caused by sulfide reducing bacteria. The result of effective treatment will be reduced corrosion rates, a reduction in iron counts and iron sulfide deposits. This stick in B form has been adjusted to a higher level of Inhibitor because of itd size.