MANDATORY REVIEW - CORROSION, PROTECTIONS, METALLURGY, EVERYTHING YOU NEED TO KNOW! - Café com química - Prof Michel - World Latest Movie, Series, Videos and Trailers

MANDATORY REVIEW - CORROSION, PROTECTIONS, METALLURGY, EVERYTHING YOU NEED TO KNOW!

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Published on Sep 8, 2023

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Iron and aluminum are two metals that are widely used in various applications due to their unique properties. Below, I will describe the main uses of both metals, as well as their advantages and disadvantages. Iron: Main Uses of Iron: Civil Construction: Automotive Industry: Railway Industry: Energy Industry: Advantages of Iron: High mechanical strength: Iron is known for its high strength, making it suitable for withstanding heavy loads and harsh environments. Disadvantages of Iron: Weight: Iron is relatively heavy compared to other materials, which can limit its application in situations that require lightness. Susceptibility to corrosion: Although it is more resistant to corrosion than some other metals, iron can still rust under certain conditions. Aluminum: Main Uses of Aluminum: Aerospace Industry: Packaging: Shipbuilding: Automotive Industry: Advantages of Aluminum: Lightness: Aluminum is significantly lighter than iron, making it ideal for applications that require weight reduction. Corrosion resistance: Aluminum is naturally resistant to corrosion, which increases its service life in humid or corrosive environments. Disadvantages of Aluminum: Lower mechanical resistance: Aluminum is less resistant than iron in terms of strength and rigidity, which limits its use in applications that require high resistance. Cost: The aluminum production process is more expensive than iron, which can affect the cost of products that use it. CORROSION PROTECTION Protecting iron against corrosion is extremely important to preserve the integrity and durability of the metal in various applications. There are several processes and techniques to protect iron from corrosion. Below, I present the main ones: Painting and Coatings: The application of paints, varnishes or protective coatings is a common method to protect iron from corrosion. These coatings create a physical barrier between the metal and the corrosive environment, preventing direct contact of the iron with moisture and oxygen. Cathodic Protection (Sacrificial Metal): This method involves introducing a more reactive metal (an anode) into contact with the iron. The anode will corrode instead of the iron, protecting it. Magnesium and aluminum are examples of metals used as anodes in cathodic protection systems. Galvanizing: Galvanizing is a process in which iron is coated with a layer of zinc. Zinc is more reactive than iron and therefore sacrifices itself in favor of iron when corrosion occurs. Use of Corrosion-Resistant Alloys: In some cases, it is possible to use metal alloys that are naturally more resistant to corrosion than pure iron. An example is stainless steel, which contains chromium to form a protective layer of chromium oxide on the surface.

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