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51315-5890-Preventing Corrosion of Reinforcing Steel in Seawater Cooling Tower and Basins

Picture for Preventing Corrosion of Reinforcing Steel in Seawater Cooling Tower and Basins
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Product Number: 51315-5890-SG
ISBN: 5890 2015 CP
Author: Zia Chaudhary
Publication Date: 2015
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$20.00
$20.00
Saudi Basic Industries Corporation (SABIC) operates some 18 world scale industrial complexes in the industrial cities of Jubail and Yanbu which produce more than 40 million metric tons per year of petrochemicals chemicals fertilizers plastics steel products and industrial gases. SABIC industrial plants use seawater to remove exothermic heat generated in the reactors. Since 2006 reinforced concrete seawater cooling towers have been built in all new SABIC plants that provide cooling system to these plants. All reinforced concrete seawater cooling towers and their basins have been constructed with built-in Cathodic Prevention (CP) systems to prevent chloride-induced corrosion of the reinforcing steel which had been a major cause in deterioration and premature failure of seawater structures in the past. Impressed current cathodic prevention (ICCP) systems were designed and installed to prevent chloride-induced corrosion of steel reinforcement in reinforced concrete seawater cooling towers basins and sumps. The anode system consisted of mixed metal oxide coated titanium expanded mesh ribbon and titanium conductor bar. For better current control and uniform current distribution across the entire protected concrete surfaces of the structures CP system were split into several independently controlled anode zones primarily based on exposure environment and then on zone size. The entire CP system is monitored and adjusted using a specifically customized remote monitoring system (i.e. software & hardware). The paper will describe design and protection criteria and emphasize particularly on the anode design anode zone configuration installation practices and special features & operation of remote monitoring system. Performance of these CP systems will be described and discussed. The discussions will focus on different polarization behavior observed in different parts of the structures i.e. atmospherically exposed humid buried and immersed during the initial performance assessment. The advantages of using RMS and knowledge on other related experiences will also be disseminated.
Saudi Basic Industries Corporation (SABIC) operates some 18 world scale industrial complexes in the industrial cities of Jubail and Yanbu which produce more than 40 million metric tons per year of petrochemicals chemicals fertilizers plastics steel products and industrial gases. SABIC industrial plants use seawater to remove exothermic heat generated in the reactors. Since 2006 reinforced concrete seawater cooling towers have been built in all new SABIC plants that provide cooling system to these plants. All reinforced concrete seawater cooling towers and their basins have been constructed with built-in Cathodic Prevention (CP) systems to prevent chloride-induced corrosion of the reinforcing steel which had been a major cause in deterioration and premature failure of seawater structures in the past. Impressed current cathodic prevention (ICCP) systems were designed and installed to prevent chloride-induced corrosion of steel reinforcement in reinforced concrete seawater cooling towers basins and sumps. The anode system consisted of mixed metal oxide coated titanium expanded mesh ribbon and titanium conductor bar. For better current control and uniform current distribution across the entire protected concrete surfaces of the structures CP system were split into several independently controlled anode zones primarily based on exposure environment and then on zone size. The entire CP system is monitored and adjusted using a specifically customized remote monitoring system (i.e. software & hardware). The paper will describe design and protection criteria and emphasize particularly on the anode design anode zone configuration installation practices and special features & operation of remote monitoring system. Performance of these CP systems will be described and discussed. The discussions will focus on different polarization behavior observed in different parts of the structures i.e. atmospherically exposed humid buried and immersed during the initial performance assessment. The advantages of using RMS and knowledge on other related experiences will also be disseminated.
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10124 Deterioration and Rehabilitation of a Newly Built Pre-Cast Reinforced Concrete Seawater Cooling Tower

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51316-7151-Recycled Waters for Cooling Tower Water Systems- Good Idea or Bad- What You Need to Know

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Recycled water quality must be evaluated to determine its potential impact on the equipment the cooling water contacts.  This paper identifies the impact of various recycled water ingredients that could either be harmful or beneficial to the equipment the cooling water contacts. Case histories. Guidelines.
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