The elements get oxidised with logarithmic law
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Metallurgical Engineering · all questionsElectrometallurgy and Corrosion
Electrometallurgy and Corrosion
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Which of the following phenomenon that occurs on metal surface during inhibition?
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Match the following:
| P. Cathodic protection | 1. Decarburisation |
| Q. Hydrogen attack | 2. Erosion |
| R. Pilling Bedworth ratio | 3. Galvanising |
| S. Cavitation | 4. Oxidation of metals |
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Identify the incorrect statement.
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Match the corrosion phenomenon with the material in which they are commonly observed.
| P. Season cracking | 1. 70 : 30 brass |
| Q. Pitting corrosion | 2. GI water line fitted with a brass tap |
| R. Galvanic corrosion | 3. Duralumin |
| S. Caustic embrittlernent | 4. Boiler steel |
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When two metals or alloys are electrically coupled while exposed to an electrolyte is called
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Which is/are the characteristics of the vapor phase inhibitor?
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Uniform corrosion
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Which protection method is depicted in then given figure?
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The mathematical expression of Faraday's II Law of Electrolysis
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From the list given below:
P. Cu
Q. Mg
R. Ni
S. Zn
Two metals which provide cathode protection to steel are:
P. Cu
Q. Mg
R. Ni
S. Zn
Two metals which provide cathode protection to steel are:
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Which metals shows P-B ratio greater than 2
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Physical barriers to corrosion may be applied in the form of coating and films when
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When Pt and Co are electrically connected, which one gets corroded
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Match the principle given in Group I with corresponding corrosion terminology in Group II.
| Group I | Group II |
| P. Electrode polarization | 1. Dezincification |
| Q. Passivity | 2. Intergranular attack |
| R. Selective leaching | 3. Over voltage |
| S. Grain boundary precipitation | 4. Surface oxide film |
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Which of the following is/are the methods for surface preparation for coating application?
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Which metals/alloys passivates spontaneously in acid solutions containing oxidizers or dissolved oxygen?
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The Faraday's laws of electrolysis are related to the
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The cathode in an electrochemical cell always carries
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Two electrolytic cells with CuSO4 and AgNO3 solutions are connected in series to a power source. If after 10 minutes the weight of copper (atomic weight 63.5) deposited in the first cell is 63.5 gms, the corrosponding weight of silver (atomic weight 108) deposited in the second cell is . . . . . . . . gms.
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