Please use this identifier to cite or link to this item: https://idr.l1.nitk.ac.in/jspui/handle/123456789/10563
Full metadata record
DC FieldValueLanguage
dc.contributor.authorUllal, Y.
dc.contributor.authorChitharanjan, Hegde, A.
dc.date.accessioned2020-03-31T08:22:46Z-
dc.date.available2020-03-31T08:22:46Z-
dc.date.issued2012
dc.identifier.citationJurnal Teknologi (Sciences and Engineering), 2012, Vol.59, SUPPL.3, pp.47-52en_US
dc.identifier.urihttp://idr.nitk.ac.in/jspui/handle/123456789/10563-
dc.description.abstractMultilayer nanocomposite coatings of Zn-Ni-SiO2 was deposited galvanostatically on mild steel (MS) from Zn-Ni bath, having Zn+2 and Ni+2 ions and uniformly dispersed nano-SiO2 particles. The corrosion performances of multilayered nanocomposite (MNC) coatings were evaluated by electrochemical polarization and impedance methods. The deposition conditions such as, bath composition, cyclic cathode current densities (CCCD's) and number of layers were optimized for peak performance of coatings against corrosion. A significant improvement in the corrosion performance of MNC coatings was observed when coating is changed from monolayer to multilayer type. Corrosion rate (CR) of MNC coating decreased progressively with number of layers up to an optimal level, and then started increasing. The increase of CR at higher degree of layering is attributed to diffusion of layers due to very short deposition time, failing to give the enhanced corrosion protection. The formation of layers, inclusion of silicate particle in MNC coating matrix were confirmed by SEM and XRD study. At optimal current densities, i.e. at 3.0-5.0 A/cm2, the Zn-Ni-SiO2 coating having 300 layers, represented as (Zn-Ni-SiO2)3.0/5.0/300 is found to be about 107 times more corrosion resistant than monolayer Zn-Ni-SiO2 coating, developed from same bath for same time. The reasons responsible for extended corrosion protection of MNC Zn-Ni-SiO2 coatings, compared to corresponding monolayer Zn-Ni and (Zn-Ni-SiO2) coatings were analyzed, and results were discussed. 2012 Penerbit UTM Press. All rights reserved.en_US
dc.titleDevelopment of multilayered nanocomposite Zn-Ni-Sio2 coatings for better corrosion protectionen_US
dc.typeArticleen_US
Appears in Collections:1. Journal Articles

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.