7. Corrosion due to the corrosiveness of the soil is known as a) Soil corrosion

Question

7. Corrosion due to the corrosiveness of the soil is known as a) Soil corrosion b Oxidation corrosion c) Galvanic corrosion d) Concentration cell corrosion 8. Corrosion due to the formation of cavities around the metal is called a) Ptng corrosion b) Soil corrosion c) Water line corrosion d) Galvanic corrosion 9. Corrosion due to the flow of the areas is termed as electro chemical corrosion by evolution of hydrogen and absorption of oxygen a) Electron current b) Proton current c) Ion current d) Neutron current cathodic and anodic termed as electro chemical corrasion by evoul etween the

Explanation / Answer

Defining all corrosions present in options:

1) Soil corrosion:

It affects buried metals and foundation that are in direct contact with corrosive soil.

2) Galvanic corrosion:

It is an electrochemical process in which metal corrodes in presence of electrolyte when it is in contact with another metal.

3) Pitting Corrosion:

It is the localised form of corrosion by which cavity or holes are produced in metal.

4) Electro chemical Corrosion:

It occurs when electrons of atom from surface of metal are transfered to suitable electron accepto or depolarizer.

5) Oxidation Corrosion:

It occurs due oxidation of metal.

Thus according to theory provided above answers of questions are as under:

7) a

8) a

9) a

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