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.
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)
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
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)~~
