IJNCSE - SPECIAL ISSUE - ICCER 2015

INTERNATIONAL JOURNAL OF NANO CORROSION SCIENCE ENGINEERING

SPECIAL ISSUE

ICCER 2015

ISSN :2395 – 7018


Research Article

TITLE :

SURFACE ANALYSIS OF PROTECTIVE FILM FORMED ON ALUMINIUM IMMERSED IN AN AQUEOUS SOLUTION AT pH 11 IN PRESENCE OF CURCUMIN, Zn2+ AND SODIUM MOLYBDATE

AUTHORS

A. Josephine Vanitha [a]*, Susai Rajendran [b] , A. Sahaya Raja [c], Geta Cârâc[d]

[a] Department of Chemistry, Sri Meenakshi Govt. Arts College for Women (Autonomous),
Madurai, Tamil Nadu, India, E-mail : josephine_vanitha@yahoo.com
[b] Department of Chemistry, RVS School of Engineering and Technology, Dindigul-
624005,India. Email : susairajendran@gmail.com
[c] PG & Research Department of Chemistry, GTN Arts College, Dindigul, India, E-mail :
sptheepandgl@gmail.com
[d] Department of Chemistry, Physics and Environment, Faculty of Sciences and
Environment, “Dunarea de Jos” University of Galati, 47 Domneasca St., 800008, Galati,
Romania, Phone:+40 745 358 371, Fax:+40 236 461353; e-mail: getac@ugal.ro,
getacc_2000@yahoo.com, Researcher ID : http://www.researcherid.com/rid/C-5756-2012

ABSTRACT


The inhibition efficiency of corrosion on aluminium immersed in an aqueous solution containing 60 ppm Cl- at pH=11 for one day system in presence of curcumin extract (CE), Zn2+ and sodium molybdate (SM) has been evaluated by weight loss method. The formulation consisting of 250 ppm of CE, 2.5 ppm of Zn2+ and 250 ppm of sodium molybdate (SM) has 98% inhibition efficiency. AC impedance spectra reveal that a protective film is formed on the metal surface. FTIR spectra reveal that the protective film consists of Al3+-CE and Al3+-SM complex. The protective film formed on the metal surface
are further analysed with the help of SEM, EDAX and AFM.

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