Definitions [1]
What is cathodic protection?
In this process base metal is forced to behave like a cathode either by connecting it with some more active metal or by using impressed current in order to protect it from corrosion. It can be explained by considering the corrosion of metal M in acid environment.
Important Questions [22]
- Porous Film is Also Called as ‘Non Protective Film’. Explain with an Example.
- Calculate the Higher and Lower Calorific Values of Coal Sample Contains 84%Carbon, 1.5% Sulphur, 0.6 Nitrogen, 5.5% Hydrogen and 8.4% Oxygen.
- Define Corrosion of Metals. Explain the Electrochemical Theory of Wet Corrosion, Giving Its Mechanism.
- Explain the Advantages of Galvanizing Over Tinning.
- Define Electrochemical Corrosion. Explain Intergranular Corrosion with a Neat Diagram
- Gold Does Not Get Corroded Due to Oxidation.Why?
- Explain the Following Factor Affecting the Rate of Corrosion:Relative Areas of Anode and Cathode.
- Distinguish between anodic and cathodic coating.
- Explain How Areas of Cathode and Anode Affect the Rate of Corrosion.
- Explain the Following Factor Affecting the Rate of Corrosion: Purity of Metal
- Explain How the Following Factors Affect the Rate Pf Corrosion I) Ph Ii) Ratio of Anode to Cathode Areas. Iii) Position of Metal in Galvanic Series.
- Explain the Following Factor Affecting the Rate of Corrosion: Effect of Ph
- Explain Why Cathodic Coating is Preferred Over Anodic Coating for Manufacturing of Containers to Store Food Stuffs.
- Iron does not rust even if the zinc coating is broken in a galvanized iron pipe. Give reasons.
- Explain the Method of Impressed Current Cathodic Protection.
- Explain Impressed Current Cathodic Protection with the Applications.
- What is Cathodic Protection?
- Distinguish Between Cathodic Protection and Anodic Protection.
- What is Pigment?
- Give Two Functions of Pigment.
- Mention Three Functions of Thinner in Paint.
- List the Three Main Constituents of Paint and Give Functions of Each.
Concepts [29]
- Types of Corrosion
- Dry Or Chemical Corrosion Due to Oxygen
- Dry Or Chemical Corrosion Due to Other Gases
- Wet Or Electrochemical Corrosion- Mechanism Evolution of Hydrogen Type
- Wet Or Electrochemical Corrosion- Mechanism Absorption of Oxygen
- Types of Electrochemical Corrosion- Galvanic Cell Corrosion
- Types of Electrochemical Corrosion Concentration Cell Corrosion
- Types of Electrochemical Corrosion Pitting Corrosion
- Types of Electrochemical Corrosion Intergranular Corrosion
- Types of Electrochemical Corrosion Stress Corrosion
- Factors Affecting the Rate of Corrosion- Nature of Metal
- Factors Affecting the Rate of Corrosion Position of Metal in Galvanic Series
- Factors Affecting the Rate of Corrosion Potential Difference
- Factors Affecting the Rate of Corrosion Overvoltage
- Factors Affecting the Rate of Corrosion Relative Area of Anodic and Cathodic Parts
- Factors Affecting the Rate of Corrosion Purity of Metal
- Factors Affecting the Rate of Corrosion Nature of the Corrosion Product
- Factors Affecting the Rate of Corrosion Temperature
- Factors Affecting the Rate of Corrosion Moisture
- Factors Affecting the Rate of Corrosion Influence of Ph
- Factors Affecting the Rate of Corrosion Concentration of the Electrolytes
- Methods to Decrease the Rate of Corrosion Material Selection
- Methods to Decrease the Rate of Corrosion Proper Designing
- Methods to Decrease the Rate of Corrosion Use of Inhibitors
- Cathodic Protection Sacrificial Anodic Protection
- Cathodic Protection Impressed Current Method
- Cathodic Protection Anodic Protection Method
- Metallic Coatings
- Organic Coatings
