Hybrid finishing coatings applied on laminar zinc primers

Hybrid finishing coatings were formulated with several film-forming materials and reinforcement fibers. In all cases, the same tri-pigmented epoxy-polyamide coating based on laminar zinc was used as primer. The results indicated that wellwetted fibers improved mechanical properties of finishing coat...

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Autores principales: Giudice, Carlos Alberto, Canosa, Guadalupe, Alfieri, Paula
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: American Chemical Society 2017
Materias:
coating; laminar zinc; steel; protection
Acceso en línea:http://hdl.handle.net/20.500.12272/2195
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-2195
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic coating; laminar zinc; steel; protection
spellingShingle coating; laminar zinc; steel; protection
Giudice, Carlos Alberto
Canosa, Guadalupe
Alfieri, Paula
Hybrid finishing coatings applied on laminar zinc primers
topic_facet coating; laminar zinc; steel; protection
description Hybrid finishing coatings were formulated with several film-forming materials and reinforcement fibers. In all cases, the same tri-pigmented epoxy-polyamide coating based on laminar zinc was used as primer. The results indicated that wellwetted fibers improved mechanical properties of finishing coating films, such as tensile strength, modulus of elasticity, hardness, adhesion, and impact resistance; on the other hand, elongation decreased according with type and level of reinforcement fibers selected. In addition, finishing coatings with semiconductive fibers displayed in salt spray (fog) apparatus, a high dissolution of metallic zinc of primer since these fibers would act as cathode in galvanic cells. According to IR spectrum analysis, chemical degradation was observed only in coatings with the binder susceptible to basic hydrolysis due to the action of hydroxyl ions formed on semiconductive fibers. Furthermore, nonconductive fibers included in finishing coatings displayed no changes in any film-forming material (even when alkyd resin was used) nor promoted excessive zinc dissolution of primer.
format Artículo
publishedVersion
Artículo
author Giudice, Carlos Alberto
Canosa, Guadalupe
Alfieri, Paula
author_facet Giudice, Carlos Alberto
Canosa, Guadalupe
Alfieri, Paula
author_sort Giudice, Carlos Alberto
title Hybrid finishing coatings applied on laminar zinc primers
title_short Hybrid finishing coatings applied on laminar zinc primers
title_full Hybrid finishing coatings applied on laminar zinc primers
title_fullStr Hybrid finishing coatings applied on laminar zinc primers
title_full_unstemmed Hybrid finishing coatings applied on laminar zinc primers
title_sort hybrid finishing coatings applied on laminar zinc primers
publisher American Chemical Society
publishDate 2017
url http://hdl.handle.net/20.500.12272/2195
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AT canosaguadalupe hybridfinishingcoatingsappliedonlaminarzincprimers
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bdutipo_str Repositorios
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