Optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications

Black chromium coating (BCC) is well known to give high performance in absorbing high solar radiation and low emittance in solar spectrum near infrared region. Different composition and plating parameters of the black chromium solution will give various combinations of the coating optical property a...

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Main Author:	Yahya, Nizamil Fairuz
Format:	Thesis
Language:	English
Published:	2001
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/6827/1/NizamilFairuzYahyaMFKM2001.pdf
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spelling	my-utm-ep.68272018-09-27T04:03:51Z Optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications 2001-03 Yahya, Nizamil Fairuz TJ Mechanical engineering and machinery Black chromium coating (BCC) is well known to give high performance in absorbing high solar radiation and low emittance in solar spectrum near infrared region. Different composition and plating parameters of the black chromium solution will give various combinations of the coating optical property and performance. The purpose of this study is to determine the optimum plating parameters using the coating solutions, which had been modified by the current work, in order to improve the optical properties and the performance of the coating. The coatings were produced from fluoride and borate baths. Newly improved fluoride baths have better throwing power and have the potential for shorter plating time from 2 to 6 minutes with excellent black coating compared to borate baths which have higher plating time from 4 to 10 minutes which is powdery and dull black in colour. It was also found that the absorptance (a) and emittance (E) values of the coating that were determined by scanning infrared spectrophotometer technique were affected by the plating parameters. The plating parameters such as plating time, bath temperature and current density, affect the grain size and distribution of surface morphology which were observed under scanning electron microscope. Coating performance which is determined by using differential thermal analyser, humidity-thermal cycle cracking, sunshine weather-ometer and salt spray tests, shows that improved fluoride black chromium coating is better than borate black chromium coating. The coating gives good thermal stability at temperature around 1300 C , excellent humidity, resistance to weather and corrosion and good coating adhesion. It is found that the coating performance is dependent on the plating parameters for both newly improved baths that should be kept between its parameter limits in order to produce good chromium coating for solar thermal application. 2001-03 Thesis http://eprints.utm.my/id/eprint/6827/ http://eprints.utm.my/id/eprint/6827/1/NizamilFairuzYahyaMFKM2001.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:62444 masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Yahya, Nizamil Fairuz Optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications
description	Black chromium coating (BCC) is well known to give high performance in absorbing high solar radiation and low emittance in solar spectrum near infrared region. Different composition and plating parameters of the black chromium solution will give various combinations of the coating optical property and performance. The purpose of this study is to determine the optimum plating parameters using the coating solutions, which had been modified by the current work, in order to improve the optical properties and the performance of the coating. The coatings were produced from fluoride and borate baths. Newly improved fluoride baths have better throwing power and have the potential for shorter plating time from 2 to 6 minutes with excellent black coating compared to borate baths which have higher plating time from 4 to 10 minutes which is powdery and dull black in colour. It was also found that the absorptance (a) and emittance (E) values of the coating that were determined by scanning infrared spectrophotometer technique were affected by the plating parameters. The plating parameters such as plating time, bath temperature and current density, affect the grain size and distribution of surface morphology which were observed under scanning electron microscope. Coating performance which is determined by using differential thermal analyser, humidity-thermal cycle cracking, sunshine weather-ometer and salt spray tests, shows that improved fluoride black chromium coating is better than borate black chromium coating. The coating gives good thermal stability at temperature around 1300 C , excellent humidity, resistance to weather and corrosion and good coating adhesion. It is found that the coating performance is dependent on the plating parameters for both newly improved baths that should be kept between its parameter limits in order to produce good chromium coating for solar thermal application.
format	Thesis
qualification_level	Master's degree
author	Yahya, Nizamil Fairuz
author_facet	Yahya, Nizamil Fairuz
author_sort	Yahya, Nizamil Fairuz
title	Optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications
title_short	Optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications
title_full	Optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications
title_fullStr	Optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications
title_full_unstemmed	Optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications
title_sort	optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2001
url	http://eprints.utm.my/id/eprint/6827/1/NizamilFairuzYahyaMFKM2001.pdf
_version_	1747814694462160896

Optimisation of plating parameters and performance analysis of black chromium coating for solar thermal energy applications

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