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Investigation of the inhibition effect of the environmentally friendly inhibitor sodium alginate on magnesium alloy in sodium chloride solution
Author(s) -
Dang N.,
Wei Y. H.,
Hou L. F.,
Li Y. G.,
Guo C. L.
Publication year - 2015
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201408141
Subject(s) - magnesium , corrosion , sodium , sodium hydroxide , magnesium alloy , adsorption , alloy , chemistry , nuclear chemistry , inorganic chemistry , materials science , metallurgy , organic chemistry
The corrosion inhibition and adsorption behavior of sodium alginate on AZ31 magnesium alloy in 3.5 wt% sodium chloride solution is investigated. The results show that sodium alginate can effectively inhibit the corrosion of AZ31 magnesium alloy. With increasing sodium alginate concentration, the inhibition efficiency initially increases and then decreases. It reaches a maximum of 90.00% at a sodium alginate concentration of 500 ppm. The inhibition is due to adsorption of sodium alginate on the bare magnesium alloy surface, where it mixes with magnesium hydroxide to form a more continuous and compact film, which retards the corrosion of the alloy.