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A Comparative Study on Corrosion Behavior of Ceramic Coatings via Plasma Spray Process in 3.5% NaCl Solution.

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Last updated: 04 Jan 2025

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Tags

Production Engineering and Mechanical Design

Abstract

In the plasma spray process, material flows through a plasma arc and the molten particles are projected through an inert gas stream with high velocity on AISI 304L stainless steel sheet to give a coating with some degree of metallurgical bonding. This study discusses the effectiveness of particle size, type of coating and direction on the corrosion of ceramic coating in 3.5 % NaCl solution. Two approaches were used for preparing coated specimens. The first modification proposed to use coarse grain sized powder in spraying as the first layer followed by the fine one. The second trial assumes to change the coating direction of the top layer to be traversing the lower layer. WC-12% Co/Al2O3 coatings were deposited on AISI 304L stainless steel by means of a plasma spray process by different deposition techniques. For comparative purposes, a set of ceramics coatings via plasma spray process was employed on a substrate with Al2O3, and WC−12% Co. Potentiodynamic polarization measurements were carried out to determine the corrosion behavior of the plasma-sprayed-coatings in 3.5% NaCl. The results showed that the corrosion resistance depends strongly on the type of coating and on its direction of coating. The grain type combination showed a great influence on the corrosion behavior of the plasma coatings, the coarse WC-12% Co covered by fine Al2O3 showed a much better corrosion resistance than the fine WC-12% Co covered by coarse Al2O3.The parallel layers of coating specimen has the best corrosion resistance between the coated specimens with lowest corrosion rate 0.425 mm/year

DOI

10.21608/bfemu.2020.94531

Keywords

Plasma coating, coarse grain, fine grain, coating direction, Corrosion

Authors

First Name

Dalia

Last Name

Ahmed

MiddleName

Saber

Affiliation

Materials Engineering Dept., Faculty of Engineering, Zagazig University, Zagazig, Egypt

Email

daliasaber13@yahoo.com

City

Zagazig

Orcid

-

Volume

43

Article Issue

1

Related Issue

13981

Issue Date

2018-03-01

Receive Date

2017-12-24

Publish Date

2020-06-08

Page Start

31

Page End

35

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 43_Issue 1_Pages 31-35.pdf

PDF . 620.0kB

Link

https://bfemu.journals.ekb.eg/article_94531.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=94531

Order

12

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

A Comparative Study on Corrosion Behavior of Ceramic Coatings via Plasma Spray Process in 3.5% NaCl Solution.

Details

Type

Article

Created At

22 Jan 2023