Journal of Surface and Hybrid Coating Technology

STM JOURNALSScientific Technical Medical

(JoSHCT) May - August 2014

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Journal of Surface and Hybrid Coating Technology

Journal of Surface and Hybrid Coating Technology

?Hybrid polymer coating materials technology

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Industrial Tribology Machine Dynamics & Maintenance

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Indian Institute of Technology Delhi, India.

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Alternative Energy Technology Laboratory,

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Amartya MukhopadhyayAssistant Professor, Department of

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AO SurendranathanProfessor ,Metallurgical & Materials

Engineering Department, National Institute of Technology

Karnataka, Surathkal, India.

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Department National Institute of Technology, Rourkela, India.

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Nirav I. JamnaparaFacilitation Centre for Industrial Plasma

Technologies Institute For Plasma Research Gandhinagar, Gujarat India.

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Chemical Engineering, Indian Institute of Technology

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Ranjit SinghChief Scientist Head of Department

Advanced Material and Process Research Institute CSIR Bhopal India.

I take the privilege to present the print version for the Volume 1 Issue (2) of the Journal of Surface

and Hybrid Coating Technology. The intension of JoSHCT is to create an atmosphere that stimulates

creativeness, research and growth in the area of surface engineering and coating technology.

The development and growth of the mankind is the consequence of brilliant Research done by

eminent Scientists and Engineers in every field. JoSCHT provides an outlet for Research findings

and reviews in areas of surface engineering and coating technology found to be relevant for national

and international recent developments & research initiative.

The aim and scope of the journal is to provide an academic medium and an important reference for

the advancement and dissemination of Research results that support high level learning, teaching and

research in the domain of surface engineering and coating technology.

Finally,I would like to thank Authors for their continued support and invaluable contributions and

suggestions in the form of authoring. I express my sincere gratitude and thanks to our Editorial/

Reviewer board for providing write ups/ reviewing and providing constructive comments for the

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been able to publish quality Research/Reviews findings for our customers base.

I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.

Dr. Archana Mehrotra

Director

STM Journals

Director's Desk

STM JOURNALS

1. Corrosion Resistance of HVOF and Plasma Sprayed Ni-Cr/WC-Co Coatings Selvakumar P., Mohamed Ismail M., Sathiyaseelan P., Karthick S., Praveen A.S. 1

ContentsJournal of Surface and Hybrid Coating Technology

JoSHCT (2014)© STM Journals 2014. All Rights Reserved

Journal of Surface and Hybrid Coating Technology

Volume 1, Issue 2

www.stmjournals.com

Corrosion Resistance of HVOF and Plasma Sprayed

Ni-Cr/WC-Co Coatings

Selvakumar P.1*, Mohamed Ismail M.

1, Sathiyaseelan P.

1, Karthick S.

1, Praveen A.S.

2

1Department of Mechanical Engineering, PSN Engineering College, Tirunelveli-627152, India

2Department of Mechanical Engineering, NIT, Tiruchirapalli-620015, India

Abstract In this work, Ni-Cr/WC-Co composite coating with an approximate thickness of 100 µm was produced by atmospheric plasma and high-velocity oxy-fuel (HVOF) thermal

spraying on SS 304 substrate. The main objective was to characterize the Ni-Cr/WC-Co

coating. The microstructure and composition of powder and coatings were studied by Scanning Electron Microscopy (SEM), Optical Microscope and X-ray Diffraction (XRD).

The coating characteristics such as porosity, and microhardness were evaluated. Finally

the corrosion rate of the coatings was measured using polarization methods. It was found that HVOF coatings have better corrosion resistance because of lower porosity value.

Keywords plasma spray, HVOF, porosity, microhardness, corrosion