Recently we have a corrosion in the DCU main tower side near the heavy naphtha section. We are thinking that is because chloride that produced acid. This chloride are from the crude desalter mainly. Is it common this kind of corrosion in the main tower side near heavy naphtha section ? What are the process conditions to keep under control this corrosion ? The upper section has lining and did not have problem. Is it possible this kind of corrosion be ammonium chloride salts ?
