| PTA装置不锈钢设备的腐蚀及防护 |
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| 引用本文： | 郭庆云,蒋仕良.PTA装置不锈钢设备的腐蚀及防护[J].石油化工腐蚀与防护,2010,27(2):35-38. |
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| 作者姓名： | 郭庆云 蒋仕良 |
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| 作者单位： | 中国石油化工股份有限公司天津分公司,天津,300271 |
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| 基金项目： | 文章引用了中国石油化工股份有限公司天津分公司芳烃部PTA装置检维修资料、北京化工大学有关VIA浆料腐蚀试验报告和《天津石化检修改造质量督导通报》中专家的分析建议等,特此致谢. |
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| 摘 要： | 介绍了中国石油化工股份有限公司天津分公司精对苯二甲酸装置在2008年设备检修期间进行的腐蚀调查情况,重点介绍了奥氏体不锈钢设备的露点腐蚀、晶间腐蚀和点蚀等事例。指出精对苯二甲酸装置316L钢设备普遍发生点蚀,主要与卤素离子(主要是Br~-和Cl~-)有关;晶间腐蚀分敏化态(焊缝)及非敏化态(母材)两种形式;干燥机筒体的酸露点腐蚀是由于壳程温度比列管温度低,产生的电位差使筒壁侧易遭受腐蚀。针对以上腐蚀原因,提出了防护措施。
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| 关 键 词： | PTA装置 奥氏体不锈钢 露点腐蚀 晶间腐蚀 点蚀 |
Corrosion of Stainless Steel Equipment in PTA Plant and Protection |
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| Guo Qingyun,Jiang Shiliang.Corrosion of Stainless Steel Equipment in PTA Plant and Protection[J].Petrochemical Corrosion and Protection,2010,27(2):35-38. |
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| Authors: | Guo Qingyun Jiang Shiliang |
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| Affiliation: | SINOPEC Tianjin Petrochemical Company ( Tianjin 300271 ) |
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| Abstract: | The corrosion investigation in the overhaul of PTA plant in SINOPEC Tianjin Petrochemical Company in 2008 was introduced. The causes of dew point corrosion, intergranular corrosion and pitting corrosion of austeuitic steel equipment were studied. It was concluded that the pitting corrosion of 316L steel was the result of halogen ions （ mainly Br - and C1- ）. Intergranular corrosion was in the form of sensitized corrosion （welds）. The dew point corrosion of dryer shell was caused by the potential difference due to the tube temperature lower than the shell side temperature. Effective protection measures were recommended. |
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| Keywords: | PTA plant austeuitic steel dew point corrosion intergranular corrosion fitting corrosion |
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