Following are the methods which are usually adopted to prevent the corrosion of ferrous metals: 1. Coal Tarring 2. Electroplatings 3. Embedding in Cement Concrete 4. Enamelling 5. Galvanizing 6. Metal Spraying 7. Painting 8. Parkersing 9. Sherardising 10. Tin Plating and Terne Plating. Method # 1. Coal Tarring: In this method, the iron is dipped in hot coal tar [...]
In this article we will discuss about:- 1. Meaning of Corrosion 2. Causes of Corrosion 3. Factors 4. Theories 5. Forms 6. Effect 7. Corrosion of Ferrous Metals 8. Corrosion of Non-Ferrous Metals 9. Standard Electrode Potential 10. Prevention of Corrosion of Steel in Concrete. Meaning of Corrosion: The term corrosion is defined as an act or process of gradual [...]
In this article we will discuss about:- 1. Introduction to Corrosion 2. Classification of Corrosion 3. Rate 4. Corrosion Rates from Polarisation and Mixed Potential Theory. Introduction to Corrosion: Corrosion is responsible for colossal loss of materials occurring everywhere every moment involving billions and billions of rupees annually. It is one of the most serious destructive agents, and is one [...]
Corrosion occurs when metals come in contact with a corrosive atmosphere. Thus, corrosion can be prevented by: 1. Geometrical Design 2. Proper Selection of Material 3. Modification of corrosive environment 4. Cathodic Protection 5. Anodic Protection. The most effective and economical method of preventing corrosion is to choose the most suitable geometrical design, most suitable material and then choose most [...]
In this article we article we will discuss about the metallic and non-metallic types of coating metals. Cost is a very important factor while choosing an engineering material. In majority of applications of metals, the importance of the corrosion factor does not warrant the use of expensive corrosion-resistant alloys. Thus, when an easily corrodible alloy like steel is used, some [...]
In this article we will discuss about:- 1. Meaning of Oxidation 2. Mechanism of Oxidation 3. Kinetics. Meaning of Oxidation: Oxidation is a type of corrosion involving the reaction between a metal and air or oxygen at high temperatures in the absence of water or an aqueous phase. It is also called dry-corrosion. At normal temperatures, the oxides of the [...]