Question

NaOH present in water reacts with boiler metal to cause cautic embrittlement- a form of boiler corrosion . The product of reaction of NaOH and boiler metal is

(a) sodium nitrate
(b) sodium ferroate
(c) sodium bicarbonate
(d) sodium carbonate​

Answer 1

Answer:

Caustic Embrittlement in Boiler Corrosion

If the concentration of sodium carbonate increases, it undergoes hydrolysis to form sodium hydroxide. The presence of sodium hydroxide produces alkaline water.. This alkaline water enters minute cracks present in the inner walls of the boiler by capillary action.

Answer 2

NaOH present in water reacts with boiler metal to cause cautic embrittlement- a form of boiler corrosion . The product of the reaction of NaOH and boiler metal is (d) sodium carbonate .

Explanation for the answer:

• The product of the reaction of NaOH and boiler metal is (d) sodium carbonate.
• Caustic corrosion also known as Caustic gouging occurs when the alkalinity of boiler water increases.
• It is also known as caustic attack.
• It is formed from the deposition of feed water corrosion products in which NaOH can concentrate to a high level of PH.
• Hence, the correct answer among all the options is option (d) sodium carbonate .

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