<?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>0872-1904</journal-id>
<journal-title><![CDATA[Portugaliae Electrochimica Acta]]></journal-title>
<abbrev-journal-title><![CDATA[Port. Electrochim. Acta]]></abbrev-journal-title>
<issn>0872-1904</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Electroquímica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0872-19042004000400004</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Corrosion Rate Evaluation of the Copper Cable Used in Grounding Systems at the ICE - Costa Rica]]></article-title>
<article-title xml:lang="es"><![CDATA[Evaluación de la Corrosión del Cable de Cobre Utilizado en Sistema de Aterrizamiento del ICE - Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tres]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saborio]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Centro de Investigación en Corrosión, CICorr-ICE  ]]></institution>
<addr-line><![CDATA[San José, ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2004</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2004</year>
</pub-date>
<volume>22</volume>
<numero>4</numero>
<fpage>345</fpage>
<lpage>360</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0872-19042004000400004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0872-19042004000400004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0872-19042004000400004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[This research was made to determine the corrosion rate of the copper cable used in grounding and lightning systems, at the electrical generation plants from the Costarrican Electrical Institute. The methods used were linear polarization resistance (LPR), and the weight loss one. This report includes both, laboratory and field tests of corrosion rates, using as electrolytes two products commercially available. Moreover, some electrochemical experiments were developed at the laboratory, in order to know the reaction mechanisms. The goal of this study was to generate criteria for the maintenance and/or the substitution of copper cables according to their deterioration. The results showed that the corrosion rate in "A" is at least ten times higher than in "B". In addition, several samples in the "A" electrolyte had pitting corrosion. The study indicates that from the point of view of the corrosion it is preferable to use product "B" like filling, since the generalized corrosion of copper is lower and in addition localized damage does not appear.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[En la presente investigación se evaluó principalmente la cinética de corrosión del cable de cobre empleado en las mallas de aterrizamiento de sistemas de pararrayos en plantas del Instituto Costarricense de Electricidad. Se aplicó tanto el método electroquímico de resistencia de polarización linear (LPR; de sus siglaas en inglés) como el gravimétrico. Se realizaron ensayos de laboratorio y de campo, empleando como electrolitos dos productos comercialmente disponibles para el aterrizamiento de mallas. También a nivel de laboratorio se desarrollaron experimentos electroquímicos para estudiar dos mecanismos de reacción. El objetivo fue generar criterios para el mantenimiento y o sustitución de los cables de cobre desde el punto de vista de su deterioro por el medio. Los resultados demostraron que la velocidad de corrosión en el electrolito "A" pude llegar a superar en más de un orden de magnitud a la de "B". Además, se presentó corrosión localizada en varias de las muestras de campo expuestas al media "A". El estudio indica que desde el punto de vista de la corrosión es preferible utilizar el producto B como relleno, ya que la corrosión generalizada del cobre es menor y además no se presenta daño localizado.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[linear polarization resistance]]></kwd>
<kwd lng="en"><![CDATA[generalized corrosion]]></kwd>
<kwd lng="en"><![CDATA[pitting corrosion]]></kwd>
<kwd lng="en"><![CDATA[polarization curves]]></kwd>
<kwd lng="en"><![CDATA[cyclic voltammetric curves]]></kwd>
<kwd lng="en"><![CDATA[grounding and lightning systems]]></kwd>
<kwd lng="es"><![CDATA[Resistencia de polarización lineal]]></kwd>
<kwd lng="es"><![CDATA[corrosión generalizada]]></kwd>
<kwd lng="es"><![CDATA[corrosión localizada]]></kwd>
<kwd lng="es"><![CDATA[curvas de polarización]]></kwd>
<kwd lng="es"><![CDATA[curvas voltamétricas anódicas cíclicas]]></kwd>
<kwd lng="es"><![CDATA[mallas de aterrizamiento]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><b> Corrosion Rate Evaluation of the Copper Cable Used in Grounding    Systems at the ICE – Costa Rica</b></p>     <p align=center> <b>&nbsp; </b></p>     <p align=center><b> G. Tres,<a name="top1"></a><a href="#back1">*</a> E. Saborio    </b></p>      <p align=center>&nbsp;</p>     <p align=center>Centro de Investigación en Corrosión, CICorr-ICE, Plantel de Colima,    Tibás, San José, Costa Rica.</p>     <p>&nbsp;</p>      <p align=center> Received  13  February 2004; accepted in revised form 12 July  2004</p>      <p>&nbsp;</p>      <p>&nbsp;</p>      <p> <b>Abstract</b></p>     ]]></body>
<body><![CDATA[<p> This research was made to determine  the corrosion rate of the copper cable used in grounding and lightning systems,  at the electrical generation plants from the Costarrican Electrical Institute.  The methods used were linear polarization resistance (LPR), and the weight loss one. This report includes both,  laboratory and field tests of corrosion rates, using as electrolytes two  products commercially available. Moreover, some electrochemical experiments were  developed at the laboratory, in order to know the reaction mechanisms.</p>     <p>The goal of  this study was to generate criteria for the maintenance and/or the substitution  of copper cables according to their deterioration. The results showed that the  corrosion rate in &quot;A&quot; is at least ten times higher than in &quot;B&quot;. In addition,  several samples in the “A” electrolyte had pitting corrosion.</p>     <p> The  study indicates that from the point of view of the corrosion it is preferable to  use product “B” like filling, since the generalized corrosion of copper is lower  and in addition localized damage does not appear.</p>     <p>&nbsp; </p>     <p><b><i> Keywords</i></b>: linear polarization resistance, generalized corrosion,    pitting corrosion, polarization curves, cyclic voltammetric curves, grounding    and lightning systems.</p>     <p>&nbsp;</p>     <p><b>Evaluaci&oacute;n de la Corrosi&oacute;n del Cable de Cobre Utilizado en    Sistema de Aterrizamiento del ICE - Costa Rica</b></p>     <p>&nbsp;</p>     <p><b>Resumen</b></p>     <p>En la presente investigaci&oacute;n se evalu&oacute; principalmente la cin&eacute;tica    de corrosi&oacute;n del cable de cobre empleado en las mallas de aterrizamiento    de sistemas de pararrayos en plantas del Instituto Costarricense de Electricidad.    Se aplic&oacute; tanto el m&eacute;todo electroqu&iacute;mico de resistencia    de polarizaci&oacute;n linear (LPR; de sus siglaas en ingl&eacute;s) como el    gravim&eacute;trico. Se realizaron ensayos de laboratorio y de campo, empleando    como electrolitos dos productos comercialmente disponibles para el aterrizamiento    de mallas. Tambi&eacute;n a nivel de laboratorio se desarrollaron experimentos    electroqu&iacute;micos para estudiar dos mecanismos de reacci&oacute;n.</p>     ]]></body>
<body><![CDATA[<p>El objetivo fue generar criterios para el mantenimiento y o sustituci&oacute;n    de los cables de cobre desde el punto de vista de su deterioro por el medio.    Los resultados demostraron que la velocidad de corrosi&oacute;n en el electrolito    &quot;A&quot; pude llegar a superar en m&aacute;s de un orden de magnitud a    la de &quot;B&quot;. Adem&aacute;s, se present&oacute; corrosi&oacute;n localizada    en varias de las muestras de campo expuestas al media &quot;A&quot;. El estudio    indica que desde el punto de vista de la corrosi&oacute;n es preferible utilizar    el producto B como relleno, ya que la corrosi&oacute;n generalizada del cobre    es menor y adem&aacute;s no se presenta da&ntilde;o localizado.</p>     <p><b><i>Palabras clave:</i></b> Resistencia de polarizaci&oacute;n lineal, corrosi&oacute;n    generalizada, corrosi&oacute;n localizada, curvas de polarizaci&oacute;n, curvas    voltam&eacute;tricas an&oacute;dicas c&iacute;clicas, mallas de aterrizamiento.</p>        <p>&nbsp;</p>      <p>&nbsp;</p>         <p>Texto completo disponível apenas em PDF.</p>     <p>Full text only available in PDF format.</p>     <p>&nbsp;</p>      <p>&nbsp;</p>      <p><b>References</b></p>      <!-- ref --><p> 1. G. Leandro, M. 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Ekbom,<i> KBS Technical Report 90, </i>1978, Nuclear  Fuel Safety Project.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000052&pid=S0872-1904200400040000400021&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> 22.  G. Camitz, T.G. Vinka, “Corrosion Resistance of Copper in  Swedish Soils”, Swedish Corrosion Institute, 2003.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000053&pid=S0872-1904200400040000400022&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> 23. S. Bradford,  “Practical Handbook of Corrosion Control in Soils”, CASTI Publishing Inc.,  Canada, 2003.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000054&pid=S0872-1904200400040000400023&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><p>&nbsp;</p>       <p><a name="back1"></a><a href="#top1">*</a> Corresponding author. E-mail address:    <a href="mailto:Gtres@ice.go.cr">Gtres@ice.go.cr</a></p>        ]]></body><back>
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