薄液膜条件下醋酸钾型除冰液对镀镉4130钢腐蚀机理研究毕业论文.doc

四川理工学院本科毕业论文 摘要 PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT I 毕业论文 薄液膜条件下醋酸钾型除冰液对镀镉4130钢腐蚀机理研究 摘 要 通过搭建薄液膜腐蚀试验装置，采用电化学工作站对薄液膜条件下醋酸钾型除冰液对镀镉4130钢腐蚀机理进行系统研究，讨论了除冰液浓度及薄液膜厚度对镀镉4130钢腐蚀行为的影响。结果表明：醋酸钾型除冰液对镀镉4130钢腐蚀机理受活化极化和浓度极化控制；除冰液浓度和薄液膜厚度对镀镉4130钢的腐蚀都有显著影响；随着除冰液浓度的增大，试样腐蚀速率先减小后增大；随着薄液膜厚度的增大，试样腐蚀速率先增大后减小；试样表面镀镉层的状态会显著影响其腐蚀效果。 关键词：薄液膜；镀镉4130钢；除冰液；腐蚀机理 四川理工学院本科毕业论文 Abstract Abstract Through constructing the thin liquid film corrosion test device, under the condition of thin liquid film by electrochemical workstation potassium acetate type deicing fluid system study on the mechanism of cadmium plated 4130 steel corrosion, discusses the deicing fluid concentration and thickness of the thin liquid film on cadmium plated steel corrosion behavior of 4130. The results showed that potassium acetate type deicing fluid on cadmium plated 4130 steel corrosion mechanisms affected by activation polarization, concentration polarization, etc. The deicing fluid concentration and the thickness of the thin liquid film on cadmium plated 4130 steel corrosion has a significant impact. With the increase of deicing fluid concentration, the corrosion speed of the sample changes first decrease and then increase. With the increase of the thickness of the thin liquid film, the corrosion speed of the sample initial decrease and then increase. State of sample surface cadmium plating layer will significantly affect the corrosion effect. Key words: Thin liquid film; Cadmium plated 4130 steel; Deicing fluid; Corrosion mechanism 四川理工学院本科毕业论文 目录 目 录 TOC \o 1-3 \h \u HYPERLINK \l _Toc9094 第一章 绪 论 l _Toc25918 1.1 除冰液及4130钢概述 l _Toc20270 1.1.1 除冰液及其传统研究方法 l _Toc28938 1.1.2 4130钢的成分及性能 l _Toc19921 1.2 薄液膜下金属电化学腐蚀行为研究 l _Toc1561 1.2.1 金属大气腐蚀主要研究方法 l _Toc665 1.2.2 薄液膜下金属电化学腐蚀行为研究现状 l _Toc30015 1.3 研究的目的与内容 l _Toc7239 1.3.1 研究的目的 l _Toc17392 1.3.2 研究的内容 l _