Case History: Client-Citgo Refinery, Lake Charles , LA Problem: Methanol coolers have been attacked by severe, highly aggressive corrosion. New coolers with a capital cost of $150,000 developed tube leaks in six months. Analysis by plant personnel discovered carbonic acid developing from carbon dioxide leakage. Inspection analysis estimated metal loss at 200-300 mils per year. Additionally the plant needed to solve this problem within a short tur

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