Which gas defect is caused by hydrogen in molten metal?

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Mr. Dubey

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Q. Which gas defect is caused by hydrogen in molten metal?

(A) blow holes
(B) air inclusions
(C) open blows
(D) pin hole porosity

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✅ Correct Answer: (D) pin hole porosity

Explanation: as hydrogen is such a small atom, it can diffuse rapidly once it is absorbed, creating pinholes. hydrogen being absorbed by the molten metal inside the furnace and inside the cavity. this is the main reason for the evolution of pinhole porosity.

Explanation by: Mr. Dubey

as hydrogen is such a small atom, it can diffuse rapidly once it is absorbed, creating pinholes. hydrogen being absorbed by the molten metal inside the furnace and inside the cavity. this is the main reason for the evolution of pinhole porosity.

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