Improvement of Microhardness and Corrosion Resistance of Stainless Steel by Nanocomposite Coating

Abstract Stainless steel (AISI 304) has good electrical and thermal conductivities, good corrosion resistance at ambient temperature, apart from these it is cheap and abundantly available; but has good mechanical properties such as hardness. To improve the hardness and corrosion resistance...

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Autores principales:	Hamid S. Mahdi, Kareem Neamah Sallomi, Hiba Husam Ismail
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2017
Materias:	Keywords: Stainless Steel, Nanocomposite Coating, Electroco-Deposition ECD, Microhardness, Corrosion Resistance, and Potentialastic Polarization. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/e71bf4acde594cc6867b254f1c7fe3e2
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spelling	oai:doaj.org-article:e71bf4acde594cc6867b254f1c7fe3e22021-12-02T05:46:59ZImprovement of Microhardness and Corrosion Resistance of Stainless Steel by Nanocomposite Coating1818-11712312-0789https://doaj.org/article/e71bf4acde594cc6867b254f1c7fe3e22017-12-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/201https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 Abstract Stainless steel (AISI 304) has good electrical and thermal conductivities, good corrosion resistance at ambient temperature, apart from these it is cheap and abundantly available; but has good mechanical properties such as hardness. To improve the hardness and corrosion resistance of stainless steel its surface can be modified by developing nanocomposite coatings applied on its surface. The main objective of this paper is to study effect of electroco-deposition method on microhardness and corrosion resistance of stainless steel, and to analyze effect of nanoparticles (Al2O3, ZrO2 , and SiC) on properties of composite coatings. In this paper employed Electroco-deposition process to develop a composite coating with (Ni) matrix and Ceramic oxide particles: Al2O3 (135nm), ZrO2 (40nm), and SiC (80nm) as reinforcements. The coatings were developed with 10 g/L, and 20 g/L concentrations in bath, at four different current densities (0.5, 1, 2, 3 A/dm2) using Watts bath to study the effect of current density and particle concentration in bath, on structure and properties of the coatings developed. The surface morphology of nanocomposite coating was characterized by Scanning Electron Microscopy (SEM). The hardness of the nanocoating was carried out using Digital Vickers microhardness tester. The corrosion resistance property of nanocomposite coating was carried out in 3.5% NaCl solution used Open circuit potential (OCP) and potentialastic polarization. The results showed the nanocomposites coating have a smooth and compact surface and have higher hardness than the uncoated stainless steel (2.3 times), and also found that the nanocomposite coating improves the corrosion resistance significantly (89.25%). Hamid S. MahdiKareem Neamah SallomiHiba Husam IsmailAl-Khwarizmi College of Engineering – University of BaghdadarticleKeywords: Stainless Steel, Nanocomposite Coating, Electroco-Deposition ECD, Microhardness, Corrosion Resistance, and Potentialastic Polarization.Chemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 10, Iss 4 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Keywords: Stainless Steel, Nanocomposite Coating, Electroco-Deposition ECD, Microhardness, Corrosion Resistance, and Potentialastic Polarization. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Keywords: Stainless Steel, Nanocomposite Coating, Electroco-Deposition ECD, Microhardness, Corrosion Resistance, and Potentialastic Polarization. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Hamid S. Mahdi Kareem Neamah Sallomi Hiba Husam Ismail Improvement of Microhardness and Corrosion Resistance of Stainless Steel by Nanocomposite Coating
description	Abstract Stainless steel (AISI 304) has good electrical and thermal conductivities, good corrosion resistance at ambient temperature, apart from these it is cheap and abundantly available; but has good mechanical properties such as hardness. To improve the hardness and corrosion resistance of stainless steel its surface can be modified by developing nanocomposite coatings applied on its surface. The main objective of this paper is to study effect of electroco-deposition method on microhardness and corrosion resistance of stainless steel, and to analyze effect of nanoparticles (Al2O3, ZrO2 , and SiC) on properties of composite coatings. In this paper employed Electroco-deposition process to develop a composite coating with (Ni) matrix and Ceramic oxide particles: Al2O3 (135nm), ZrO2 (40nm), and SiC (80nm) as reinforcements. The coatings were developed with 10 g/L, and 20 g/L concentrations in bath, at four different current densities (0.5, 1, 2, 3 A/dm2) using Watts bath to study the effect of current density and particle concentration in bath, on structure and properties of the coatings developed. The surface morphology of nanocomposite coating was characterized by Scanning Electron Microscopy (SEM). The hardness of the nanocoating was carried out using Digital Vickers microhardness tester. The corrosion resistance property of nanocomposite coating was carried out in 3.5% NaCl solution used Open circuit potential (OCP) and potentialastic polarization. The results showed the nanocomposites coating have a smooth and compact surface and have higher hardness than the uncoated stainless steel (2.3 times), and also found that the nanocomposite coating improves the corrosion resistance significantly (89.25%).
format	article
author	Hamid S. Mahdi Kareem Neamah Sallomi Hiba Husam Ismail
author_facet	Hamid S. Mahdi Kareem Neamah Sallomi Hiba Husam Ismail
author_sort	Hamid S. Mahdi
title	Improvement of Microhardness and Corrosion Resistance of Stainless Steel by Nanocomposite Coating
title_short	Improvement of Microhardness and Corrosion Resistance of Stainless Steel by Nanocomposite Coating
title_full	Improvement of Microhardness and Corrosion Resistance of Stainless Steel by Nanocomposite Coating
title_fullStr	Improvement of Microhardness and Corrosion Resistance of Stainless Steel by Nanocomposite Coating
title_full_unstemmed	Improvement of Microhardness and Corrosion Resistance of Stainless Steel by Nanocomposite Coating
title_sort	improvement of microhardness and corrosion resistance of stainless steel by nanocomposite coating
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2017
url	https://doaj.org/article/e71bf4acde594cc6867b254f1c7fe3e2
work_keys_str_mv	AT hamidsmahdi improvementofmicrohardnessandcorrosionresistanceofstainlesssteelbynanocompositecoating AT kareemneamahsallomi improvementofmicrohardnessandcorrosionresistanceofstainlesssteelbynanocompositecoating AT hibahusamismail improvementofmicrohardnessandcorrosionresistanceofstainlesssteelbynanocompositecoating
_version_	1718400265987555328

Improvement of Microhardness and Corrosion Resistance of Stainless Steel by Nanocomposite Coating

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