在生物燃料储中模拟局部腐蚀
Hossein Moradi1, Gabriele Grifò1, Maria Francesca Milazzo2
1Department of Mathematical, Computer, Physical and Earth Sciences, University of Messina, V.le F. Stagno D'Alcontres, 31 Messina, 98166, Italy.
Mathematical biosciences and engineering : MBE
|March 14, 2025
概括
生物燃料加快了由于有机酸在储中的局部腐蚀. 一个新的模型预测腐蚀率增加和坑道增长,有助于风险评估和维护规划.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 大气储容易受到局部"坑洞"腐蚀的影响.
- 与传统燃料相比,含有有机酸的生物燃料可能会加剧腐蚀.
- 了解腐蚀机制对于水箱完整性和环境安全至关重要.
研究的目的:
- 为了模拟生物燃料对碳钢储中坑腐蚀的影响.
- 开发一种包含有机酸反应的电化学相场模型.
- 预测单个和多个相互作用的坑的腐蚀率和坑的演变.
主要方法:
- 开发了一种电化学相场模型.
- 使用有限元素方法进行数值集成的非线性合部分微分方程.
- 追踪金属/电解质接口演变和预测的腐蚀率.
- 对实验数据进行验证的单个坑模型.
主要成果:
- 与传统燃料相比,生物燃料中的有机酸显著增加了腐蚀率.
- 腐蚀速率遵循一个两阶段的过程,坑洞深度由双功率定律描述.
- 多个相互作用的坑显示放大了腐蚀性,坑密度比间距更为关键.
- 观察了多个坑的长期坑生长中的"带"行为.
结论:
- 拟议的模型准确地预测了生物燃料引起的蚀腐蚀.
- 生物燃料具有更高的腐蚀风险,需要优化维护和检查策略.
- 该模型作为风险评估和环境危害预测的工具.
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