Universität zu Köln

Garg, Rishabh, Rajagopalan, Narayanan, Pyeon, Myeongwhun, Goenuellue, Yakup, Fischer, Thomas, Khanna, Anand S. and Mathur, Sanjay (2018). Plasma CVD grown Al2O3 and MgAl2O4 coatings for corrosion protection applications. Surf. Coat. Technol., 356. S. 49 - 56. LAUSANNE: ELSEVIER SCIENCE SA. ISSN 0257-8972

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Abstract

The development of active corrosion protection systems for metallic substrates is an issue of prime concern. The objective of this work was to demonstrate the applicability of plasma enhanced CVD (PECVD) in growing protective top oxide layers over sol-gel deposited organosiloxane (R-SiOx; water based inorganic-organic hybrid coating formulation containing 3-glycidoxypropyltrimethoxysilane and methyltrimethoxysilane, crosslinked with hexamethylmethoxymelamine) coating to improve its thermal stability, chemical inertness and corrosion resistance. [MgAl2((OBu)-Bu-t)(4)H-4] and [AlH2((OBu)-Bu-t)](2) were used as single source precursors for depositing MgAl2O4 and Al2O3 thin films respectively. The coating systems namely, Al2O3/R-SiOx (ALSI) and MgAl2O4/R-SiOx (MALSI) were comparatively analyzed towards their corrosion protection behaviour. The post annealed PECVD deposited films were uniform, transparent and exhibited good adhesion as confirmed by focused ion beam scanning electron microscope (FIB-SEM) cross sectional analysis. ALSI and MALSI bilayer systems were found to be stable over temperatures as high as 600 degrees C. Corrosion performance of the coating systems effectively demonstrated the protective function of ALSI and MALSI bilayer system. However, it was observed that ALSI outperforms MALSI in this application.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Garg, Rishabh UNSPECIFIED UNSPECIFIED UNSPECIFIED Rajagopalan, Narayanan UNSPECIFIED UNSPECIFIED UNSPECIFIED Pyeon, Myeongwhun UNSPECIFIED UNSPECIFIED UNSPECIFIED Goenuellue, Yakup UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Khanna, Anand S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-161777
DOI:	10.1016/j.surfcoat.2018.09.054
Journal or Publication Title:	Surf. Coat. Technol.
Volume:	356
Page Range:	S. 49 - 56
Date:	2018
Publisher:	ELSEVIER SCIENCE SA
Place of Publication:	LAUSANNE
ISSN:	0257-8972
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHEMICAL-VAPOR-DEPOSITION; ALUMINUM-OXIDE FILMS; ORGANIC COATINGS; HYBRID COATINGS; MAGNESIUM ALLOY; STAINLESS-STEEL; SILANE COATINGS; THIN-FILMS; GEL FILMS; SPINEL Multiple languages Materials Science, Coatings & Films; Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16177