《埋地管道腐蚀机理及防腐技术和材料研究》-毕业论文.doc

PAGE PAGE 1 青岛科技大学毕业论文 埋地管道腐蚀机理 及防腐技术及材料研究 学生姓名： 学 号： 专业班级：油气储运 指导教师： 年6月20日 青岛科技大学本科毕业论文 PAGE 1 摘要 油气输送管道的使用优点日益突出。由于土壤环境的复杂性，使埋地钢管受到严重腐蚀。埋地管道的腐蚀严重影响其使用寿命和所输油品质量，甚至造成泄漏。本文从长输管道外腐蚀控制所需考虑的因素出发，通过对金属管道的腐蚀机理分析及对管道周围环境腐蚀性的检测，了解腐蚀发生的原因，提出有效的防护措施。并结合国内外长输管道外防护技术的特点和防腐蚀层应用的现状，分析、比较了目前主要防护材料的防腐蚀性能。而且针对埋地管道的均匀腐蚀问题，利用一些常规公式推导出管道腐蚀剩余寿命的计算公式，并给出了算例，为管道腐蚀剩余寿命计算提供了理论依据。并给出了自己的认识及日后的打算。 关键词：埋地管道；腐蚀；防护；检测；剩余寿命 ABSTRACT The advantage of oil/gas transmission pipeline is increasing visible. Because of the complexity of the soil environment, buried pipelines seriously affected the useful life of pipelines and the quality of oil/gas, and even make the pipes leaking. This article took the control factors of long-distance oil/gas pipeline into account, and analyzed the corrosion mechanism and detected the corrosiveness of surrounding environment of metal pipes, then comprehended the reason of corrosion and proposed effective corrosion prevention measure. Combined with the characteristic of corrosion prevention measures and present situation of corrosion protective covering application at home and abroad, analyzed and contrasted main antiriot material property. But also in view of general corrosion problem of buried pipelines, using several routine equations fetched the calculation equations of corrosion remaining life of buried pipelines and gave examples, and hence provided theoretical criterion for calculating service life of buried oil/gas pipelines. And I also give my cognition and plan for this respect. Keywords buried pipeline; corrosion; prevention; monitoring; remaining life 目 录 TOC \o 1-3 \h \z HYPERLINK \l _Toc169947330 第1章 前言 PAGEREF _Toc169947330 \h 1 HYPERLINK \l _Toc169947331 第2章 埋地管线的腐蚀环境及金属腐蚀机理 PAGEREF _Toc169947331 \h 2 HYPERLINK \l _Toc169947332 2.1 埋地管线腐蚀环境 PAGEREF _Toc169947332 \h 2 HYPERLINK \l _Toc169947333 2.2 腐蚀机理 PAGEREF _Toc169947333 \h 3 HYPERLINK \l _Toc169947334 2.2.1 化学腐蚀 PAGEREF _Toc169947334 \h 3 HYPERLIN