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Enhancement of Corrosion Resistance AISI 304 Steel by Plasma Polymerized Thin Films

Published online by Cambridge University Press:  22 March 2013

Nazir M. Santos ,
Jayr Amorim ,
Pedro A.P. Nascente ,
Célia M.A. Freire ,
Nilson C. Cruz  and
Elidiane C. Rangel
Nazir M. Santos
Affiliation:
State University of Sao Paulo, Laboratory of Technological Plasmas, UNESP, Sorocaba, SP, Brazil
Jayr Amorim
Affiliation:
Brazilian Center of Research in Energy and Materials, Brazilian Bioethanol Science and Technology Laboratory, CTBE, Campinas, SP, Brazil
Pedro A.P. Nascente
Affiliation:
Federal University of Sao Carlos, UFSCar, Department of Materials Engineering, São Carlos, SP, Brazil
Célia M.A. Freire
Affiliation:
State University of Campinas, UNICAMP, Department of Materials Engineering, Campinas, SP, Brazil
Nilson C. Cruz
Affiliation:
State University of Sao Paulo, Laboratory of Technological Plasmas, UNESP, Sorocaba, SP, Brazil
Elidiane C. Rangel
Affiliation:
State University of Sao Paulo, Laboratory of Technological Plasmas, UNESP, Sorocaba, SP, Brazil
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Abstract

The purpose of this work is the deposition of films in order to increase the corrosion resistance of AISI 304 steel, which is a material used to construct the reactors for bioethanol production. This deposition inhibits the permeation of corrosive species to the film-metal interface. Thin films were prepared by radio-frequency plasma enhanced chemical vapor deposition (RF-PECVD) method using plasmas of hexamethyldisiloxane/argon/oxygen mixtures excited by signals of different powers. The plasma was generated by the application of RF power of 13.56 MHz to the sample holder while keeping grounded the topmost electrode and the chamber walls. The effect of the RF power on the properties of the samples was investigated by perfilometry, X-ray photoelectron spectroscopy (XPS), contact angle, and electrochemical impedance spectroscopy (EIS). The results of the corrosion resistance tests of the AISI 304 steel were interpreted in terms of the energy delivered to the growing layer by plasma excitation power.

Keywords

barrier layercorrosionplasma-enhanced CVD (PECVD) (deposition)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1499: Symposium N – Precision Polymer Materials―Fabricating Functional Assemblies, Surfaces, Interfaces and Devices , 2013 , mrsf12-1499-n05-154
Copyright
Copyright © Materials Research Society 2013

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