20#碳钢和321不锈钢在高温环烷酸中的腐蚀行为
Corrosion Behavior of Carbon Steel and 321 Stainless Steel in Naphthenic Acid at High Temperature
摘 要
高温环烷酸腐蚀是加工高酸原油过程中主要的腐蚀问题,温度和环烷酸浓度对其影响很大.本工作采用动态高温反应釜研究了不同温度和环烷酸浓度下20#碳钢和321不锈钢的腐蚀行为.结果表明,两种材质在环烷酸中的腐蚀速率随温度升高均呈现先增加后减小的规律.在环烷酸浓度为5%时,碳钢在280 ℃时腐蚀速率最高,而321不锈钢在260~280 ℃时腐蚀速率最高.在280 ℃时,随环烷酸浓度的增大,两种材料的腐蚀速率急剧增加,但浓度对两种材料的腐蚀速率加速比不同.在一定的环烷酸浓度下,两种材料的腐蚀速率发生突跃,对于20#碳钢,在环烷酸浓度1.5%～2%时存在一个腐蚀突跃区,而321不锈钢的腐蚀突跃区在环烷酸浓度为3%～5%之间.
20#碳钢
321不锈钢
温度
浓度
naphthnic acid corrosion
20# carbon steel
321 stainless steel
temperature
concentration
Abstract
Naphthenic acid corrosion is a main corrosion problem in processing of crude oil with high acid values,and the temperature and concentration of naphthenic acid may have great effect on the corrosion.A dynamic high pressure reactor was used to investigate the corrosion behavior of 20＃ carbon steel and 321stainless steel(SS) under the condition of different temperatures and different concentrations of naphthenic acid.The results showed that the corrosion rate of the two materials had a maximum at a certain temperature.When concentration of the naphthenic acid was 5%,the corrosion rate of carbon steel reached the maximum at 280 ℃,and the corrosion rate of 321SS reached the maximum at the range of 260~280 ℃.At 280 ℃,the corrosion rate of the two materials increased sharply with increasing the concentration of naphthenic acid,but the speedup factors were different.The corrosion rate of the two materials in naphthenic acid had a leap range at certain concentration,for carbon steel,the concentration range was between 1.5% to 2%,for 321SS,it was between 3% to 5%.
中图分类号 TG172.6
所属栏目 试验研究
基金项目
收稿日期 2009/12/27
修改稿日期 2010/3/2
网络出版日期
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联系人作者胡洋(sea7273@163.com)
备注胡洋,高级工程师.
引用该论文: HU Yang,CHENG Xue-qun,ZHOU Jian-long,ZHANG Xin,LI Xiao-gang. Corrosion Behavior of Carbon Steel and 321 Stainless Steel in Naphthenic Acid at High Temperature[J]. Corrosion & Protection, 2010, 31(10): 775～777
被引情况:
【1】于洪淼,刘峰,杨骁,刘全新,史艳华,梁平, "304不锈钢在高温环烷酸介质中的腐蚀行为",腐蚀与防护 34, 977-980(2013)
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参考文献
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【3】Yepez.Influence of different sulfur compounds on corrosion due to naphthenic acid[J].Fuel,2005(84):97-104.
【4】Cooper.Naphthenic acid corrosion[J].Hydrocarbon Processin,1972(8):75-76.
【5】闫铁伦,王 罡.辽河油田石化总厂西常减压装置环烷酸腐蚀规律及防护[J].石油化工腐蚀与防护,1996,13(3):8-17.
【6】董晓焕,姜 毅.四种常用钢材耐环烷酸腐蚀性能研究[J].石油化工腐蚀与防护,2004,21(2):1-4.
【7】敬和民,吴欣强,郑玉贵,等.Mo含量对不锈钢在环烷酸介质中腐蚀与冲蚀的影响[J].金属学报,2002,38(10):1067-1073.
【8】苏芳云,朱文胜,杨志强,等.减压塔填料快速腐蚀失效原因分析[J].石油化工腐蚀与防护,2006,23(2):42-45.
【9】高延敏,陈家坚,余 刚,等.环烷酸对A3钢腐蚀机理的研究[J].腐蚀科学与防护技术,2000,12(1):27-29.
【10】陈碧凤,杨启明.六种材料环烷酸腐蚀的动力学分析[J].石油炼制与化工,2006,37(5):49-52.
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