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炼油厂常压蒸馏装置的常压塔运行介质原油中夹带杂质，导致产生低温ＨＣＩ－Ｈ２Ｓ－Ｈ２Ｏ腐蚀、硫及硫化物腐蚀和高温环烷酸腐蚀，其中以高温环烷酸腐蚀尤为突出。防止低温 ＨＣｌ－Ｈ２Ｓ－Ｈ２Ｏ腐蚀常采取原油深度脱盐，脱（盐）后注碱，塔顶挥发线注氨、注缓蚀剂和注水等防腐工艺；防止高温环烷酸腐蚀可将常压塔的主体材料采用２０Ｒ＋３１６Ｌ复合钢板，常压塔内件采用普通碳钢渗铝材料。中原 ２５０×１０４ｔ／ａ常压蒸馏装置的常压塔下部塔体制造时采用 ２０Ｒ＋３１６Ｌ复合钢板来防止环烷酸腐蚀。
Atmospheric pressure tower oil refinery atmospheric distillation tower operating medium entrained impurities in crude oil, resulting in low temperature HCI-H2S-H2O corrosion, sulfur and sulfide corrosion and high temperature naphthenic acid corrosion, especially in high temperature naphthenic acid corrosion is particularly prominent. To prevent the corrosion of low temperature HCl-H2S-H2O often take deep desalination of crude oil, salt (alkali) after the injection, the top of the volatile line Note ammonia, corrosion inhibitor and water injection and other anti-corrosion process; prevent high temperature naphthenic acid corrosion can atmospheric tower The main material using 20R +316 L composite steel, atmospheric pressure tower parts using ordinary carbon steel aluminized material. Central Plains 250 × 104t / a atmospheric distillation tower under the tower at the time of the manufacture of 20R +316 L composite steel plate to prevent naphthenic acid corrosion.