Cooling Water (CW) Corrosion and fouling are closely related and should be considered together. Critical factors in controlling both include: process and CW temperatures, heat flus, water velocity, type and quality of water (salt, brackish, fresh), and type of cooling system. When managing heat exchanger bundles, cooling water corrosion control is simply a matter of proper design, continuous maintenance of high quality water treatment, and proper operating practices. Corrosion in CW exchangers can manifest itself as general thinning, pitting, stress corrosion cracking, and microbiologically induced corrosion (MIC). Metallurgical upgrades may be necessary in some circumstances, especially where fluid velocities cannot be adequately controlled, process or CW temperatures are too high, or water chemistry is not good.
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January/February 2018 Inspectioneering Journal
By Ashfaq Anwer
Sea water corrosion and erosion issues can affect almost all commonly used metallurgy in a refinery or petrochemical plant. This brief article explains the dangers behind sea water used in plant cooling systems and discusses several metallurgical and material solutions to resist sea cooling water corrosion. |
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May/June 2005 Inspectioneering Journal
By John Reynolds at Intertek
Cooling water (CW) corrosion may be the oldest form of corrosion in the petrochemical industry, yet the industry still struggles with it for two primary reasons. |
