Corrosion Control

There are two types of corrosion that happen in water systems: uniform or localized. Both types of corrosion are not ideal and result in the gradual destruction of metals. Rust is the most familiar example of corrosion. Degradation of plumbing systems can lead to issues such as pipe leaks, loss of efficiency, and short pump life expectancy. The Larson-Skold Corrosion Index is used to measure how aggresive water is. Corrosion coupon racks are used in many applications to calculate the corrosion index.  This test involves placing previously weighed steel and copper samples into the water system, then weighing the samples after a few days and recording the change.

Uniform Corrosion - Coupon - cleaned up

Uniform/General Corrosion

  • This is when corrosive water removes a uniform amount of material, thinning a metal surface.
  • Uniform corrosion always occurs to some degree in a water system.
  • It is not regarded as the most serious form of corrosion because it is relatively easy to predict.




Localized Corrosion - Coupon2

Localized Corrosion

  • There are many different kinds of localized corrosion, such as pitting, MIC, and under deposit.
  • It affects small areas of a metal surface, causing inconsistencies in the metal.
  • In a short amount of time, localized corrosion can cause penetration through the metal.
  • Localized corrosion is difficult to predict, measure, and stop.



Flow-Tech Inhibits Corrosion

  • Due to higher possible cycles of concentration with Flow-Tech, the pH rises, leading to a more corrosion neutral state, usually 8 to 9.
  • An alkaline environment allows CaCO3 to act as a natural cathodic corrosion inhibitor.
  • Low bacteria counts and lack of biofilm prevent Microbial Induced Corrosion (MIC) Learn more
  • By eliminating corrosive oxidizing biocides, chemically induced corrosion can be avoided.
  • Chloride pitting is avoided by managing cycles of concentration.


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Flow-Tech SystemsCorrosion Control