DEPARTMENT OF MECHANICAL ENGINEERING

 Seminar Topic: Corrosion – Types, Prevention, and Case Studies Course Relevance: Mechanical Engineering / Materials Engineering / Manufacturing Technology 1. Introduction to Corrosion Definition: Corrosion is the gradual deterioration of a metal due to chemical or electrochemical reactions with its surrounding environment. Simple Example: Rusting of iron when exposed to air and moisture. Why Corrosion is Important Reduces strength of components Causes machine failures Increases maintenance cost Leads to safety hazards Reduces service life of structures 2. Basic Mechanism of Corrosion Electrochemical Corrosion Process In the presence of water (electrolyte), small anodic and cathodic regions form on the metal surface. Anode Metal dissolves Fe → Fe²⁺ + 2e⁻ Electrolyte Water / Moisture Conducts ions between regions Cathode Oxygen reacts O₂ + H₂O + e⁻ → OH⁻ 3. Types of Corrosion 3.1 Uniform Corrosion Description: Corrosion occurs evenly over the entire surface. Examples: Rusting of ste...

  The Importance of Nanomaterials in Mechanical Engineering Introduction Nanomaterials are materials with at least one dimension in the range of 1 to 100 nanometers (nm) . At this scale, materials exhibit unique physical, chemical, electrical, and mechanical properties that differ significantly from their bulk counterparts. Due to their exceptional strength, lightweight nature, thermal stability, and wear resistance, nanomaterials have become increasingly important in mechanical engineering applications. 1. What are Nanomaterials? A nanometer (nm) is one-billionth of a meter. Comparison of Sizes: 1 Meter = 1000 mm 1 mm = 1000 µm 1 µm = 1000 nm Human Hair Diameter ≈ 80,000 nm Red Blood Cell ≈ 7,000 nm Nanomaterial ≈ 1 - 100 nm Classification of Nanomaterials Type Example Nanoparticles Silver nanoparticles, Titanium dioxide Nanotubes Carbon Nanotubes (CNTs) Nanowires Silicon Nanowires Nanocoatings Nano-ceramic coatings Nanocomposites Polymer-CNT composites 2. Structure of Nanomateri...

  Parametric and Generative design are transforming Mechanical Engineering Introduction: The Design Revolution Modern mechanical design is powered by tools that go far beyond static drafting. Parametric and generative design empower engineers to create adaptable, intelligent, and efficient products quickly—reshaping everything from automotive parts to industrial machinery. What is Parametric Design? Parametric design uses parameters (such as dimensions, material properties, and geometric relationships) to control and automate the creation of engineering models. By tweaking these variables, students can instantly update their design and explore multiple variants. All modifications are rule-based, so changing one input (like a hole diameter) updates related features across the model. Engineers maintain direct control over the model structure and iteration, promoting rapid customization. Widely used for gears, brackets, housings, and modular assemblies, parametric modeling is integral...