Circulating water corrosion and equipment service life
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A very important issue facing circulating water systems is the corrosion of heat exchangers and pipes. I would like to ask those working on the production front line: what type of corrosion has the greatest impact on the lifespan of heat exchangers and pipes – general corrosion or corrosion beneath scale? I read a paper that stated that general corrosion accounts for only about 10% in practice, while about 90% is local corrosion, including corrosion beneath scale. Is that correct?
If the circulating water quality is very poor, general corrosion is also severe, but under-scale corrosion always appears first.
If there is scale, can the chemical reach beneath it?
Yes, the corrosion was severe at first; after having it handled by a professional service provider, things have improved a lot now. It’s essential to hire a professional team for this task.
Moreover, the pipes are corroded, with the return pipes being even more severely affected.
In a closed-loop water system, there is a type of scale inhibitor that can prevent the formation of scale.
In a closed system, the water will not become concentrated, and little scale inhibitor will be consumed. In the industrial sector, especially in the larger ones, they are basically open-type; maybe I didn’t explain it clearly enough.
Expert, why is the backflow pipe problem more severe? I seek your advice. Is it because of the high temperature or?
Yes, high temperatures lead to easy buildup of scale, severe corrosion beneath the scale, and even pitting.