Chapter 9, Problem 9.85P

Interpretation Introduction

Interpretation:

The oxygen content in copper after degassing treatment needs to be determined.

Concept introduction:

Degassing is a process of removing hydrogen content from molten metal.

It is necessary to remove hydrogen content from molten metal before casting to improve the quality of the casting.

Degassing is performed in two ways:

Diffusion of hydrogen into inert gas bubbles

The concentration of hydrogen into inert gas bubbles.

Amount of gas in molten metal is determined by sieverts law.

According to sievert's law,

Percent of gas = $k\sqrt{Pgas.}$

Here, K= Constant

And. Pgas = Partial pressure of the gas.