Influencia del espesor de zinc en la resistencia a la corrosion cosmetica de exquemas de pintado automotrices

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Influencia del espesor de zinc en la resistencia a la corrosion cosmetica de exquemas de pintado automotrices

Zapponi, Monica / Bruno, Sonia / Pedraza, Juan Pablo

Increasing environmental corrosivity and guarantees for cosmetic corrosion and perforation given by automobile manufacturers have lead to use more precoated steel sheet in body and chassis parts. Electrogalvanized steel has some advantages over hot dip galvanized steel: ductility, phosphatability and closely controlled thicknesses, which is advantageous for pretreatments and cataphoresis processes. At present zinc thickness reduction in precoated steel is a worldwide increasing tendency towards the improvement of cost /performance relationship. The aim of this work is to evaluate zinc thickness influence on cosmetic corrosion resistance of paint systems for automotive applications. Automotive companies develop their own standards for cosmetic corrosion testing. Some of these accelerated and cyclic tests were applied on samples with different zinc coating thickness. Scribe creep was measured after testing. Significant differences in corrosion resistance for 7.5 and 9 micron thicknesses were not detected.

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Document information

Title :

Influencia del espesor de zinc en la resistencia a la corrosion cosmetica de exquemas de pintado automotrices

Additional title:

Einfluss der Zinkschichtdicke auf die kosmetische Korrosionsbeständigkeit von Fahrzeuglackiersystemen
Influence of zinc thickness in cosmetic corrosion resistance of automobile paint systems

Contributors:

Zapponi, Monica (author) / Bruno, Sonia (author) / Pedraza, Juan Pablo (author)

Published in:

Conference on Uses of Steel, 4 ; 32-38

Publication date :

2008

Size :

7 Seiten, 3 Bilder, 4 Tabellen, 7 Quellen

ISBN :

978-950-9671-04-1

Type of media :

Conference paper