Continuous or Intermittent Injection? How to Choose a Corrosion-Inhibitor Dosing Strategy
Explain the engineering roles of pre-filming, continuous injection, and intermittent injection, and how they should work together under dynamic flow conditions.
Article Summary
The key question is not which injection mode is universally best, but how to maintain a stable protective film while flow continuously removes or damages it. Pre-filming establishes the initial interface; continuous injection supplies low-dose chemical to maintain a dynamic balance; intermittent injection rebuilds a film after degradation or local failure.
The most stable field program often combines all three. Wall shear stress, water continuity, medium disturbance, and the system's tolerance for unprotected intervals are the principal variables in the decision.
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