Corrosion control

Question 1

Chemicals used to change alkalinity and ph (6) lower (5) raise

Answer 1

Lower
1. Gas chlorine
2. Sulfuric acid
3. Carbon dioxide
4. Alum
5. Ferric chloride
6. Hydrofluosilicic acid

Raise
1. Sodium hydroxide (caustic soda)
2. Calcium hydroxide ( lime)
3. Sodium bicarbonate (soda)
4. Sodium carbonate (soda ash)
5. Calcium hypochlorite

Question 2

Type of corrosion depends on which characteristics (2)

Answer 2

Chemical and physical

Question 3

Corrosion is a chemical reaction from (3)

Answer 3

Anode
Cathode
Electrolyte

Question 4

Relationship of ph and alkalinity

Answer 4

High ph lower alk
Lower ph high alk

Alkalinity ppm
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0 50 100 150 200 250 300