Scholarlink

<p>In this paper, the corrosion behavior of 20 steel in PZ/MDEA-CO<sub>2</sub> environment of desorption column at different temperatures was studied by means of corrosion simulation experiment, electrochemical test, and water chemical simulation calculation. The results show that the average corrosion rates of 20 steel in the mixed amine solution and the amount of Fe ions in the solution increased linearly with the increase in the temperature. The corrosion products were FeCO<sub>3</sub>, Fe<sub>3</sub>C, and a small amount of α-FeOOH. With the rise of temperature, the cathodic and anodic reactions were accelerated. At the same time, the solution pH went up, more anodic reaction intermediates FeOH<sub>ad</sub> were generated and adsorbed on the electrode surface, and the <i>R</i><sub>ct</sub> value of the charge-transfer resistance first decreased and then increased. In addition, there was increasingly obvious formation of skeleton-like residual Fe<sub>3</sub>C structure on the surface of the specimen, and the solubility product <i>K</i><sub>sp</sub> of FeCO<sub>3</sub> is continuously reduced, which makes it easier for Fe<sup>2+</sup> and CO<sub>3</sub><sup>2−</sup> in the solution to reach saturation and continue to deposit, so the product films are gradually formed and covered, but the protection of the matrix is poor.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effects of Temperature on Corrosion Behavior of 20 Steel in the PZ/MDEA-CO2 Environment of Desorption Column

  • 期刊论文

  • 发表日期：

    2025年5月12日

查看全文
  • Fan Xuehua,
  • Yu Zhenguo,
  • Fang Kun,
  • Chen Yufan,
  • Ma Hailin,
  • Zhang Runze,
  • Wang Zhu,
  • Zhou Jingwei,
  • Hu Jiahui,
  • Yin Dianhui,
  • Lin Xueqiang,
  • Sun Jianbo

摘要

In this paper, the corrosion behavior of 20 steel in PZ/MDEA-CO2 environment of desorption column at different temperatures was studied by means of corrosion simulation experiment, electrochemical test, and water chemical simulation calculation. The results show that the average corrosion rates of 20 steel in the mixed amine solution and the amount of Fe ions in the solution increased linearly with the increase in the temperature. The corrosion products were FeCO3, Fe3C, and a small amount of α-FeOOH. With the rise of temperature, the cathodic and anodic reactions were accelerated. At the same time, the solution pH went up, more anodic reaction intermediates FeOHad were generated and adsorbed on the electrode surface, and the Rct value of the charge-transfer resistance first decreased and then increased. In addition, there was increasingly obvious formation of skeleton-like residual Fe3C structure on the surface of the specimen, and the solubility product Ksp of FeCO3 is continuously reduced, which makes it easier for Fe2+ and CO32− in the solution to reach saturation and continue to deposit, so the product films are gradually formed and covered, but the protection of the matrix is poor.