Control of corrosion rate in petrochemical circulating water

2025-09-08View Original

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The factors that affect the corrosion of the inner wall of pipes in circulating cooling water mainly include flow velocity, dissolved oxygen, carbon dioxide, chloride ions, sulfate ions, hardness, conductivity, pH value, temperature, etc. Factors affecting the corrosion of the outer wall surface of the tube include humidity, pH value, and electrical conductivity. Through long-term research and investigation into circulating water systems, it has been found that the three main factors affecting corrosion in such systems are chloride ions, pH value, and calcium ions. The acceptable range for these values is as follows: chloride ions at less than 500 mg/L, pH value between 7.5 and 8.5, and calcium ions at less than 200 ppm.

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Control of corrosion rate in petrochemical circulating water

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