Open AccessRefining of degasifying and removing of non-metallic impurities during aluminium alloy production
Author(s) -
Thong Duy Nguyen,
Nga T.T. Tran,
Hong Thi Dinh
Publication year - 2015
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v18i3.870
Subject(s) - refining (metallurgy) , aluminium , alloy , materials science , hydrogen , metallurgy , impurity , metal , water vapor , adsorption , oxide , oxygen , hydrogen production , alonizing , inorganic chemistry , chemistry , organic chemistry
In melting aluminum and aluminum alloy, molten aluminum reacts readily with oxygen, cacbon monoxide and cacbon dioxide; it also reacts with adsorbed water, water present in hydrated oxide films on metal charges, water vapor in the atmosphere of the furnace to form oxides and hydrogen. As a result, a higher level of hydrogen is retained in the metal. In solid aluminum, hydrogen in excess of the solution limit can precipitate as H2 at grain boundaries. Thus, refining and degasifying can be improved mechanical properties of material.