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中国腐蚀与防护学报  2018, Vol. 38 Issue (1): 33-38    DOI: 10.11902/1005.4537.2017.005
  研究报告 本期目录 | 过刊浏览 |
10#碳钢在HCl-H2O环境中的露点腐蚀行为
偶国富, 赵露露, 王凯, 王宽心, 金浩哲()
浙江理工大学 流动腐蚀研究所 杭州 310018
Dew-Point Corrosion Behavior of 10# Carbon Steel inHCl-H2O Environment
Guofu OU, Lulu ZHAO, Kai WANG, Kuanxin WANG, Haozhe JIN()
Institute of Flow Induced Corrosion, Zhejiang Sci-Tech University, Hangzhou 310018, China
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摘要: 

针对常压塔顶系统的HCl-H2O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) pH值、冲击速度及冲击角度等因素对HCl-H2O环境中10#碳钢露点腐蚀行为的影响。结果表明:在HCl-H2O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pH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-H2O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Fe2O3

关键词 10#碳钢HCl-H2O环境露点腐蚀SEM影响因素    
Abstract

The influence of the pH 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 pH 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.

Key words10# carbon steel    HCl-H2O environment    dew point corrosion    SEM    influence factor
收稿日期: 2017-01-09     
ZTFLH:  TQ026.5  
基金资助: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) 和浙江省科协“育才工程”项目 (2017YCGC016)
作者简介:

作者简介 偶国富,男,1965年生,教授

引用本文:

偶国富, 赵露露, 王凯, 王宽心, 金浩哲. 10#碳钢在HCl-H2O环境中的露点腐蚀行为[J]. 中国腐蚀与防护学报, 2018, 38(1): 33-38.
Guofu OU, Lulu ZHAO, Kai WANG, Kuanxin WANG, Haozhe JIN. Dew-Point Corrosion Behavior of 10# Carbon Steel inHCl-H2O Environment. Journal of Chinese Society for Corrosion and protection, 2018, 38(1): 33-38.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2017.005      或      https://www.jcscp.org/CN/Y2018/V38/I1/33

图1  露点腐蚀模拟装置简图
图2  10#碳钢在不同pH值HCl溶液中的腐蚀速率
图3  10#碳钢在不同冲击角度条件下的腐蚀速率
图4  10# 碳钢在不同冲击速度条件下的腐蚀速率
图5  10# 碳钢腐蚀产物膜的表面微观形貌
图6  10# 碳钢腐蚀产物膜的XRD谱
图7  10#碳钢腐蚀产物膜的表面微观形貌
图8  10#碳钢腐蚀产物膜去除后的表面微观形貌
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