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所在平台: Udemy |
课程主页: https://www.udemy.com/course/corrosion-allowances/
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coursera课程总结：腐蚀余量与腐蚀速率 本课程共12个模块，深入探讨腐蚀及其控制方法。腐蚀是一种金属在特定环境下，通过化学或电化学反应逐渐被破坏的自然过程。腐蚀工程则致力于控制和预防腐蚀。 课程将重点介绍以下内容： 1. **腐蚀余量**：这是为抵御设备在使用过程中发生的腐蚀，在其设计厚度上额外增加的材料厚度。腐蚀余量通常添加到每个组件的最小所需厚度上，或者通过提供耐腐蚀包覆层来保护设备免受服务环境的侵蚀。 2. **腐蚀速率**：指金属在特定环境中恶化的速度，也可定义为单位时间内腐蚀损失的厚度。腐蚀速率取决于环境条件以及金属的类型和状态。 3. **腐蚀速率与腐蚀余量的关系**：探讨两者之间的相互影响和计算依据。 4. **法拉第定律**：这是理解电化学腐蚀过程及其量化计算的基础。 5. **电化学腐蚀**：介绍腐蚀过程中的电化学原理。 6. **腐蚀电流**：衡量腐蚀反应强度的重要参数。 7. **腐蚀密度**：单位面积上的腐蚀电流。 8. **纯元素与合金的等效重量**：为计算腐蚀速率提供基础数据。 9. **基于法拉第定律的腐蚀速率公式**：推导和应用计算腐蚀速率的公式。 10. **塔菲尔图**：一种用于测定腐蚀电流的实验方法。 11. **几种元素的电化学参数示例**：具体展示不同元素的腐蚀相关参数。 12. **纯元素与合金的实际计算**：通过实例，进行腐蚀电流、腐蚀密度、等效重量和腐蚀速率的计算。 通过本课程的学习，学员将能够深入理解腐蚀的原理，掌握腐蚀速率的计算方法，以及如何通过合理设置腐蚀余量来延长设备的使用寿命。
Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual destruction of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engineering is the field dedicated to controlling and preventing corrosion.The corrosion allowance is how much material is added to the design thickness to allow for in-service corrosion. The allowance is usually added to the minimum required thickness for each component, or a corrosion-resistant cladding is provided to protect the vessel from the service environment.Corrosion rate is the speed at which any metal in a specific environment deteriorates. It also can be defined as the amount of corrosion loss per year in thickness. The speed or rate of deterioration depends on the environmental conditions and the type and condition of the metal under referenceIn this course we are going to cover the content in the following steps1.What is Corrosion allowance2.What is Corrosion rate3.Relationship b/w Corrosion Rate & Corrosion allowance4.Faraday's Laws5.Electrochemical Corrosions6.Corrosion Current7.Corrosion Density8.Equivalent weight for Pure Elements & Alloys9.Formula for Corrosion Rate from Faraday's Laws10.Tafel Plots: To calculate the corrosion current11.Examples of electrochemical parameters for few elements12.Actual Calculations for Pure elements & Alloys•Corrosion current•Corrosion Density•Equivalent weight•Corrosion rate
