Paper Title:

Evaluation of Environmentally Friendly Zr Based Nano Structured Conversion Coating for HRS (Hot Rolled Steel) in Powder Coating

Periodical Defect and Diffusion Forum (Volumes 283 - 286)
Main Theme Diffusion in Solids and Liquids IV
Edited by Andreas Öchsner, Graeme E. Murch and Ali Shokuhfar
Pages 316-322
DOI 10.4028/www.scientific.net/DDF.283-286.316
Citation Bulent Tepe et al., 2009, Defect and Diffusion Forum, 283-286, 316
Online since March 2009
Authors Bulent Tepe, Banihan Gunay
Keywords Conversion Coat, Corrosion, Hot Rolled Steel, Powder Coating
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Metals, despite their deterioration in a corrosive atmosphere, continue to dominate the automotive, agricultural, furniture, process and appliance industries and HRS (Hot Rolled Steel) plays a significant role in those areas. Powder coating on HRS is widely employed for protective and aesthetic purposes. Prior to powder coating, phosphating conversion coating is often used to increase effectiveness of protection. However, due to tightening environmental legislations, phosphating process is now problems for industry. Therefore, newly developed environmentally friendly conversion coats are introduced to industry. In this study a new environmentally friendly zirconium fluoro-based (H2ZrF6) generation of conversion coating has been introduced to replace the conventional phosphating conversion coatings process. It is deposited on the surface with a thin nanometre range, therefore shortening the process, which also has advantages such as being free of heavy metal and operating in low or ambient temperature. The present work closely examines Zr based nano structured conversion coatings for HRS. Extensive corrosion and adhesion studies are carried out on differently prepared HRS test panels, pre-treated with Zr based conversion coating in various conditions, such as different composition ratio, temperature and contact time.