Characteristics of corrosion

Q.  Which of the following statements is/are true for erosion corrosion?
- Published on 11 Sep 15

a. The dissolution rate of protective film increases due to turbulent flow
b. Erosion corrosion occurs due to high turbulent fluid flow
c. The corrosion rate can be reduced by reducing the velocity of fluid
d. All of the above

ANSWER: All of the above

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    Discussion

  • Sravanthi    -Posted on 16 Nov 15
    - Erosion corrosion is caused due to loss of film material due to high velocity or high turbulent fluid flow.

    - Energy transfer from fluid to wall is increased due to high turbulence intensity. The dissolution rate of protective film increases due to increased turbulence.

    - This erosion can be controlled by varying the velocity of fluid because erosion corrosion is caused due the joint action of molecular corrosion and solid particulate.

    - This corrosion can be controlled by proper selection of resistant material, by decreasing the flow velocity and by minimizing turbulence.

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