Logarithmic rate law
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Metallurgical Engineering · all questionsElectrometallurgy and Corrosion
Electrometallurgy and Corrosion
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Which of the following is/are the examples for metal-coated articles?
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The passive film in stainless steel forms above the
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What is meant by vapor deposition?
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The thickness of oxide film is 'y' at a time 't' If K1, K2 and K3 are the temperature dependent constants, the parabolic law of oxidation is given by
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Which of the following metals is highest active in the Galvanic series?
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A pipeline buried in soil is commonly protected from corrosion by
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Which of the following is/are the limitations of Pourbaix diagrams?
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Identify the false statement:
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What is depicted in the given polarization curve?
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Which of the following metal does not resists the corrosion process?
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For oxide layer to be protective, the Pilling Bedworth ratio should be
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AI2O3 + 6H+ = 3H2O + 2Al, ΔG° = 897.3 kJ, where hydrogen ion concentration is unity. The reaction potential of the above reaction under standard state will be
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Match applications in Group 1 with the commonly used corrosion protection methods in Group 2.
| Group 1 | Group 2 |
| P. Sea going vessel | 1. Inorganic coating |
| Q. Undergrciund pipeline | 2. Sacrificial anode |
| R. Electric traction tower | 3. Aluminium paint |
| S. Electric poles | 4. Impressed current |
| 5. Galvanising |
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Match the following:
| P. Sensitization | 1. Phosphating |
| Q. Sacrificial anode | 2. Anodic protection |
| R. Nickel plating | 3. Cathodic protection |
| S. Conversion coating | 4. Stainless steel |
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Displacement of metal stands for
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The following is employed as sacrificial anode to provide cathodic protection to ships, pipelines and storage tanks :
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