10~#碳钢在HCl-H_2O环境中的露点腐蚀行为  

Dew-Point Corrosion Behavior of 10~# Carbon Steel in HCl-H_2O Environment

作　　者：偶国富 赵露露 王凯 王宽心 金浩哲 OU Guofu, ZHAO Lulu, WANG Kai, WANG Kuanxin, JIN Haozhe(Institute of Flow Induced Corrosion, Zhejiang Sei-Teeh University, Hangzhou 310018, Chin)

机构地区：[1]浙江理工大学流动腐蚀研究所,杭州310018

出　　处：《中国腐蚀与防护学报》2018年第1期33-38,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金煤炭联合基金(U1361107);国家重点研发计划(2017YFF0210403);浙江省自然科学基金(LY17E060008);浙江省科协"育才工程"项目(2017Y CGC016)~~

摘　　要：针对常压塔顶系统的HCl-H_2O露点腐蚀环境,利用扫描电子显微镜(SEM)、X射线衍射(XRD)和失重法等分析手段,研究了腐蚀性介质(HCl液滴)p H值、冲击速度及冲击角度等因素对HCl-H_2O环境中10~#碳钢露点腐蚀行为的影响。结果表明:在HCl-H_2O环境中,10~#碳钢的露点腐蚀速率随HCl液滴冲击速度的增大而增大,随HCl液滴p H值和冲击角度的增大而减小,且露点腐蚀速率在冲击角度为45°时存在一个转折点;HCl-H_2O环境中10~#碳钢的腐蚀类型为点腐蚀,其表面布满大小不一、形状不规则的点蚀坑,溶液中存在的Cl-会使点蚀坑加深;10~#碳钢表面所形成腐蚀产物膜的主要成分为α-FeOOH和Fe_2O_3。The influence of the p H value, impact velocity and impact angle of the corrosive medium（HCl droplet） on the dew point corrosion behavior of 10^#carbon steel in a simulated HCl-H2O dew point corrosion environment of the atmospheric tower system was investigated by means of mass change measurement, scanning electron microscopy（SEM）, X-ray diffraction（XRD）. Results indicate that： the dew point corrosion rate of 10^#carbon steel increases with the impact velocity, and decreases with the increasing p H value and impact angle of HCl droplet, while a turning point of the dew point corrosion rate exists at the impact angle of 45°. The corrosion mode of 10^# carbon steel in the HCl-H2O environment is pitting corrosion, and there are many pits with different sizes and shapes on its surface, and Cl-in the solution will deepen the pits. The main composition of corrosion product on 10^#carbon steel is α-FeOOH and Fe2O3.

关 键 词：10^#碳钢 HCl-H2O 环境 露点腐蚀 SEM 影响因素 

分 类 号：TQ026.5[化学工程]