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Which of the following metals has the lowest liquid solubility (cc/kg) of hydrogen at atmospheric pressure?

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in Casting-Forming-Welding I by (687k points)
Which of the following metals has the lowest liquid solubility (cc/kg) of hydrogen at atmospheric pressure?

(a) Iron

(b) Copper

(c) Magnesium

(d) Aluminium

The question was posed to me in an online quiz.

My doubt is from Gases in Metals topic in division Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

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Best answer
Correct choice is (d) Aluminium

To explain: Hydrogen solubility is an acute problem in ferrous casting. Liquid solubility of hydrogen in aluminium is 7cc/kg, which is lowest comparatively to other metals. So, it is not very difficult to handle aluminium and chances of inclusion of gas are also very less due to less liquid solubility.

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