文件格式：nh
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适用专业：控制工程
适用年级：大学
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论文编号：200378
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硕士论文-嵌入式系统可逆调试器的设计与实现，正文共68页。
【摘要】 钢筋混凝土结构由于其所处的恶劣环境,在多种物理化学作用下时常发生钢筋的锈蚀和破坏。尤其是像海洋平台,海港码头,跨海桥梁等处在海水环境中的钢筋混凝土结构,很容易受到海水中氯离子的侵蚀,发生电化学腐蚀而造成钢筋锈蚀,使用年限往往达不到预期的要求。根据国内外的研究现状,阴极保护技术已被证实是针对钢筋腐蚀较为有效的一种防护技术。该项技术最关键的一点是外加电流密度和保护电位参数的确定。目前工程上应用的多是经验值,我们需要对其做出进一步的探索。另外,我国防护系统的监控还比较落后,急需一批智能的监测控制设备的研制。本文基于阴极保护技术对海水中的钢筋进行腐蚀防护。确定阴极保护技术的参数值,设计监测控制系统。概括本文主要工作内容如下：1、了解国内外钢筋混凝土的腐蚀防护技术,分析各种技术的优缺点。并着重调研了阴极保护技术的应用和发展状况。2、掌握阴极保护技术,研究电化学阻抗谱的理论知识。分析电化学阻抗谱在确定保护电位中的应用,使用频谱图和等效电路的方法对体系进行研究。3、提出了一种在阴极极化曲线上确定保护电位的方法。通过分析验证,在保护区域内,曲线存在唯一的拐点,该点的极化率最大,腐蚀速度最慢,可以作为数学计算的一个保护点。4、研制终端控制设备,完成软硬件的设计,实现与监控中心PC机的通讯。通过实验测试,该系统可以成功的采集到被保护钢筋的电流和极化电位,并根据环境的变化自动施加钢筋所需的电流,达到实时防护的目的。
【Abstract】 Reinforced concrete structure is susceptible to damage from Corrosion under the actions of the various physical and chemical because of its location in harsh environment. The Reinforced concrete structure, especially as offshore platforms, port terminals and sea bridge which are in marine environment, is vulnerable to the erosion of chloride ions in the sea water and the electrochemical corrosion caused by corrosion, that makes its life is often not achieve the desired requirements. According to research status at home and abroad, cathodic protection technology has been proven to be a more effective technology for a reinforcement corrosion protection. The key point of this technology is to determine the parameters of applied current density and the protection potential. At present, empirical value is usually used in the engineering, and we should make further exploration. In addition, the monitoring of protection systems is still relatively backward, and needs a development research of intelligent monitoring and control equipment.1. Comprehend corrosion protection technology of reinforced concrete at home and abroad. This paper Analysis advantages and shortcomings of various corrosion protection technologies. And research focused on the application and development of cathodic protection.2. Master the cathodic protection technology and research theoretical knowledge of the electrochemical impedance spectroscopy. Analysis the application of electrochemical impedance spectroscopy in determining the protective potential, using spectrum and equivalent circuit to study the method of system3. This paper proposes a method that determination the protection potential based on cathodic polarization curves. By analyzing the verification, there is a unique curve inflection point in the protection region. The point’s polarization has a maximum value and the slowest corrosion rate, which could be used as a protection point of mathematical calculations.4. A terminal control equipment is developed in this paper. This work contains completing the hardware and software design, achieving its communication to the monitoring center PC. Through experimental tests, this system can successfully collects the current and polarization potential of the protected reinforcement, and can automatically apply the current required according to the environment changes so as to achieve the purpose of real-time protection.
【关键词】 阴极保护； 电化学阻抗谱； 极化曲线； 保护电位； 嵌入式系统；
【Key words】 Cathodic protection； Electrochemical impedance spectroscopy； Polarization curve； Protection potential； Embedded systems；
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- 硕士论文-强制电流阴极保护实时腐蚀防护的研究
强制电流阴极保护实时腐蚀防护的研究.nh [6.26MB]
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发表于 2012-1-20 03:19:33
