精品文档---下载后可任意编辑ETA 对核电站二回路镍基合金 690 和碳钢的腐蚀影响的开题报告标题：ETA 对核电站二回路镍基合金 690 和碳钢的腐蚀影响的讨论摘要：本文主要探讨 ETA（应力腐蚀裂纹）对核电站二回路中的镍基合金690 和碳钢的腐蚀影响。在电化学实验中，通过模拟真实工况，使用不同浓度的 ETA 溶液，分别对镍基合金 690 和碳钢进行腐蚀实验。通过扫描电子显微镜（SEM）、能谱仪（EDS）和拉曼光谱等技术对材料的腐蚀形貌、成分和化学变化等进行表征分析。讨论结果表明，ETA 引起的应力作用下，镍基合金 690 和碳钢都出现了不同程度的腐蚀和裂纹，但镍基合金 690 具有更高的抗腐蚀性能。关键词：ETA；镍基合金 690；碳钢；腐蚀；电化学实验Abstract:This paper mainly discusses the corrosion effects of ETA (stress corrosion cracking) on nickel-based alloy 690 and carbon steel in the secondary loop of nuclear power plants. In the electrochemical experiment, different concentrations of ETA solution were used to simulate the real working conditions, and nickel-based alloy 690 and carbon steel were separately subjected to corrosion experiments. The corrosion morphology, composition and chemical changes of the materials were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and Raman spectroscopy. The research results show that under the stress caused by ETA, both nickel-based alloy 690 and carbon steel have varying degrees of corrosion and cracks, but nickel-based alloy 690 has higher corrosion resistance.Keywords: ETA; nickel-based alloy 690; carbon steel; corrosion; electrochemical experiment
