Protection of 2024-T3 aluminium alloy by corrosion resistant phytic acid conversion coating

authors	Shi, HW; Han, EH; Liu, FC; Kallip, S
nationality	International
journal	APPLIED SURFACE SCIENCE
author keywords	Aluminium alloy; Phytic acid; Conversion coating; Corrosion
keywords	SELF-ASSEMBLED MONOLAYER; COPPER CORROSION; MAGNESIUM ALLOYS; AQUEOUS-SOLUTION; NACL SOLUTION; CERIUM OXIDE; ADSORPTION; DEPOSITION; AA2024-T3; MICROSTRUCTURE
abstract	The corrosion protection properties of environmentally friendly phytic acid conversion coatings were studied on 2024-T3 aluminium alloy. The films were prepared under acidic conditions with various pH values and characterised by SEM, EDS, ATR-FTIR and electrochemical techniques. The results indicate that the conversion coatings obtained by immersing the alloy in phytic acid solutions at pH from 3 to 5.5 provide excellent corrosion resistance. ATR-FTIR confirms that the film is formed by deposition of reaction products between Al3+ and phosphate groups in phytic acid molecules. The conformation models of the deposition film are proposed. (C) 2013 Elsevier B.V. All rights reserved.
publisher	ELSEVIER SCIENCE BV
issn	0169-4332
year published	2013
volume	280
beginning page	325
ending page	331
digital object identifier (doi)	10.1016/j.apsusc.2013.04.156
web of science category	Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter
subject category	Chemistry; Materials Science; Physics
unique article identifier	WOS:000321045700049