Scholarlink

<p>During the oil and gas extraction, the corrosion of carbon steel pipelines poses a serious threat to the safe production of oil and gas. The use of corrosion inhibitors is one of the effective methods to solve this tough issue. In this work, a novel dimmer acid imidazoline derivative (DIMTU) was developed as corrosion inhibitor for carbon steel in CO<sub>2</sub>-containing oilfield produced water. The experimental test results show that DIMTU has outstanding corrosion inhibition effects, with an inhibition efficiency of 98.54% at the concentration of 250 ppm. Quantum chemical calculations indicate that the introduction of thiourea into dimmer acid imidazoline can significantly increase the adsorption sites, effectively improving the adsorption ability of DIMTU. GTN-xTB calculations reveal that DIMTU molecule could strongly adsorb on the steel surface through the bonding of the S, N, C atoms of imidazoline ring and thiourea fragment to steel surface. The adsorbed DIMTU film could prevent the contact of corrosion species to the steel surface and effectively suppress the corrosion of steel.</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

A novel high-efficient imidazoline derivative corrosion inhibitor for carbon steel in CO2-containing oilfield produced water: experimental and theoretical studies

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月8日

查看全文
  • Ganghua Huang,
  • Wen Chen,
  • Chao Miao,
  • Cong Shen,
  • Yong bo Wang,
  • G. A. Zhang

摘要

During the oil and gas extraction, the corrosion of carbon steel pipelines poses a serious threat to the safe production of oil and gas. The use of corrosion inhibitors is one of the effective methods to solve this tough issue. In this work, a novel dimmer acid imidazoline derivative (DIMTU) was developed as corrosion inhibitor for carbon steel in CO2-containing oilfield produced water. The experimental test results show that DIMTU has outstanding corrosion inhibition effects, with an inhibition efficiency of 98.54% at the concentration of 250 ppm. Quantum chemical calculations indicate that the introduction of thiourea into dimmer acid imidazoline can significantly increase the adsorption sites, effectively improving the adsorption ability of DIMTU. GTN-xTB calculations reveal that DIMTU molecule could strongly adsorb on the steel surface through the bonding of the S, N, C atoms of imidazoline ring and thiourea fragment to steel surface. The adsorbed DIMTU film could prevent the contact of corrosion species to the steel surface and effectively suppress the corrosion of steel.