<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2224-6185</journal-id>
<journal-title><![CDATA[Tecnología Química]]></journal-title>
<abbrev-journal-title><![CDATA[RTQ]]></abbrev-journal-title>
<issn>2224-6185</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-61852021000200311</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Galvanización por inmersión en caliente. Parte 1: modelo no estacionario del perfil de temperatura]]></article-title>
<article-title xml:lang="en"><![CDATA[Hot - dip galvanizing. Part 1: non stationary model of temperature profile]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Vargas]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-Pupo]]></surname>
<given-names><![CDATA[Sergio Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrano-Mulet]]></surname>
<given-names><![CDATA[May Yudith]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Empresa de Servicios Técnicos de Computación, Comunicaciones y Electrónica del Níquel (SERCONI)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Oriente Centro Universitario Municipal Contramaestre ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<volume>41</volume>
<numero>2</numero>
<fpage>311</fpage>
<lpage>325</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-61852021000200311&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-61852021000200311&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-61852021000200311&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La galvanización por inmersión en caliente es un método efectivo para la protección de los materiales ferrosos de la corrosión. El proceso consiste en aplicar al material un recubrimiento por inmersión en un baño de cinc fundido a temperaturas entre 440ºC y 460ºC durante cierto tiempo y el posterior enfriamiento. Este trabajo tuvo el propósito de modelar el perfil de calentamiento de una cuba de galvanización a régimen no estacionario utilizando el método de los nodos y considerando la transferencia de calor por radiación, convección libre y conducción. La cuba posee las dimensiones: 7100 x 1600 x 1350 mm (largo x ancho x profundidad) y la generación de calor se produce por resistencias eléctricas. A través de un proceso iterativo, asumiendo &#916;x=&#916;y=0,178m y un intervalo de tiempo &#916;t=0,011h, se estimó el gradiente de temperatura en 420 puntos de la cuba (x; y) en función del tiempo y los coeficientes de transferencia de calor, cumpliendo con requisitos técnicos previstos. Los resultados permitieron incrementar el conocimiento sobre el perfil de calentamiento de la cuba para la posterior automatización del proceso, la correspondencia entre el tiempo de operación establecido y el predicho por el modelo fue satisfactoria. Se estimó que el intervalo de temperatura entre 526ºC a 538ºC en la fuente de calor es probablemente el más conveniente para finalizar la operación de calentamiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The hot-dip galvanizing is an effective method for protecting ferrous materials against the corrosion. This technique consists of applying a deposit by immersing the parts in a molten zinc bath, at temperatures between 440ºC and 460ºC for a certain amount of time and their subsequent cooling. This work had the purpose of modeling the heating profile of a galvanizing cell at a non-stationary regime using the node method and considering heat transfer by radiation, free convection and conduction. The cell has the dimensions: 7100 x 1600 x 1350 mm (length x width x depth) and the heat generation takes place by electric resistances. Through an iterative process, assuming &#916;x=&#916;y=0,178m and a time interval &#916;t=0,011h, the temperature gradient at 420 points of the cell (x; y) was estimated as a function of time and the heat transfer coefficients, satisfying the expected technical requirements. The results allowed increasing the knowledge about the cell heating for the subsequent process automation, the correspondence between the established operating time and that predicted by the model was satisfactory. The temperature range between 526°C to 538°C at the heat source was estimated to be probably the most convenient to end the heating operation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[galvanización por inmersión]]></kwd>
<kwd lng="es"><![CDATA[modelación]]></kwd>
<kwd lng="es"><![CDATA[perfil de calentamiento]]></kwd>
<kwd lng="en"><![CDATA[hot-dip galvanizing]]></kwd>
<kwd lng="en"><![CDATA[modeling]]></kwd>
<kwd lng="en"><![CDATA[heating profile]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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