give a brief explanation of the answers 10. Corrosion due to difference in water
ID: 1885141 • Letter: G
Question
give a brief explanation of the answers
10. Corrosion due to difference in water level is a)Soil corrosion b)Oxidation corrosion c) ing corrosion d) Water line corrosion 11. Which of the following comes under the wet corrosion? a) Concentration cell corrosion b)Oxidation corrosion c) Liquid metal corrosion d) Corrosion by other gases 12. Corrosion is uniform in a) Dry corrosion b)Wet corrosion c) Ping corrosion d) Water line corrosion 13. Corrosion along the grain boundaries is called a) b) c) d) Stress corrosion Inter granular corrosion Water line corrosion Pitting corrosion Dry corrosion takes place in a) Homogeneous solutions b) Heterogeneous solutions c) Nether homogeneous nor heterogeneous d) Both homogeneous and heterogeneous solutions 14.Explanation / Answer
10. d) Waterline corrosion
Corrosion due to formation of varying concentrations of the aeration. When a metallic surface is partly in contact of water then the metal below the water line gets corroded. Because the water below the line is poorly oxiginated and acts as anode and at same time the metal above water line is highly oxiginated and acts as cathode.
11. d) Corrosion by other gases
It is also called dry corrosion or chemical corrosion and occurs due to chemical action of atmospheric gases like CO2, SO2 etc.
12. a) Dry Corrosion
Dry corrosion is uniform as it occurs due to the action of atmospheric gases to which the surface is exposed.
13. b) Inter granular corrosion
Corrosion along the grain boundaries is called as the inter granular corrosion and stress corrosion is due to the static tensile strength.
14. d) Both homogeneous and heterogeneous solution
Dry corrosion takes place in the both homogeneous and heterogeneous solutions. The wet corrosion takes place in only heterogeneous processes.
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