Chapter 15 - Corrosion Control

Question 1

The gradual deterioration or destruction of a substance or material by chemical action.
The action proceeds inward from the surface.

Answer 1

Corrosion

Question 2

Metal deposits left in pipelines and plumbing fixtures.

Answer 2

Scaling

Question 3

The water treatment process intended reduce the corrosive or scale-forming tendencies of water.

Answer 3

Stabilization

Question 4

A knob of rust formed on the interior of cast-iron pipes as a result of corrosion.

Answer 4

Tubercule

Question 5

Rust-colored water resulting from the formation of ferric hydroxide from iron naturally dissolved in the water or from the action of bacteria.

Answer 5

Red Water

Question 6

A form of localized corrosion that can form deep pits and tubercules.

Answer 6

Concentration Cell Corrosion

Question 7

A form of localized corrosion caused by the connection of dissimilar metals in an electrolyte, such as water.

Answer 7

Galvanic Corrosion

Question 8

The point at which water can no longer dissolve any more of a particular chemical.
Precipitation of the chemical will occur beyond this point.

Answer 8

Saturation Point