Explain why cathodic coating is preferred over anodic coating for manufacturing of containers to store food stuffs.
Concept: Cathodic Protection Sacrificial Anodic Protection
Porous Film is also called as ‘Non protective Film’. Explain with an example.
Concept: Types of Corrosion > Dry Or Chemical Corrosion Due to Oxygen
Define Electrochemical Corrosion. Explain Intergranular Corrosion with a neat diagram.
Concept: Types of Electrochemical Corrosion Intergranular Corrosion
Iron does not rust even if the zinc coating is broken in a galvanized iron pipe.Give reasons.
Concept: Cathodic Protection Impressed Current Method
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.
Concept: Types of Corrosion > Dry Or Chemical Corrosion Due to Other Gases
What is cathodic protection?
Concept: Cathodic Protection Impressed Current Method
Explain impressed current cathodic protection with the applications.
Concept: Cathodic Protection Impressed Current Method
Mention three functions of thinner in paint.
Concept: Organic Coatings
Define corrosion of metals. Explain the electrochemical theory of wet corrosion, giving its mechanism.
Concept: Types of Corrosion > Wet Or Electrochemical Corrosion- Mechanism Evolution of Hydrogen Type
List the three main constituents of paint and give functions of each.
Concept: Organic Coatings
Explain how areas of cathode and anode affect the rate of corrosion.
Concept: Factors Affecting the Rate of Corrosion Relative Area of Anodic and Cathodic Parts
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.
Concept: Factors Affecting the Rate of Corrosion Influence of Ph
Gold does not get corroded due to oxidation. Why?
Concept: Factors Affecting the Rate of Corrosion- Nature of Metal
Distinguish between anodic and cathodic coating
Concept: Factors Affecting the Rate of Corrosion Relative Area of Anodic and Cathodic Parts
Explain the advantages of galvanizing over tinning.
Concept: Types of Electrochemical Corrosion- Galvanic Cell Corrosion
Explain the following factor affecting the rate of corrosion:
Relative areas of anode and cathode.
Concept: Factors Affecting the Rate of Corrosion Relative Area of Anodic and Cathodic Parts
Explain the following factor affecting the rate of corrosion:
Purity of Metal
Concept: Factors Affecting the Rate of Corrosion Purity of Metal
Explain the following factor affecting the rate of corrosion: Effect of pH
Concept: Factors Affecting the Rate of Corrosion Influence of Ph
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