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Effect of pH and glycolic acid on corrosion of AA6061 alloy in ethylene glycol–water solution
Author(s) -
Zhang D. Q.,
Zhou L. X.,
Rao C. Y.,
Gao L. X.
Publication year - 2014
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.201206619
Subject(s) - glycolic acid , alloy , ethylene glycol , scanning electron microscope , corrosion , materials science , energy dispersive x ray spectroscopy , electrochemistry , inorganic chemistry , nuclear chemistry , chemical engineering , chemistry , metallurgy , organic chemistry , composite material , electrode , lactic acid , genetics , bacteria , engineering , biology
The corrosion behaviors of AA6061 alloy in ethylene glycol (EG)–water solution were investigated by weight‐loss test and electrochemical measurement. The surface morphology observation and composition analysis were performed by scanning electron microscopy (SEM) and energy dispersive X‐ray (EDX) spectroscopy. After weight‐loss test, the pH of EG–water solution increased. The presence of glycolic acid (GA) enhanced the corrosion susceptibility of AA6061 alloy. The higher pH value intensified the aggressive action of GA to AA6061 alloy. GA forms a complex with aluminum ions and its negative charge centers of oxygen atom plays a key role for the complex formation.