<?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>0120-2804</journal-id>
<journal-title><![CDATA[Revista Colombiana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Colomb.Quim.]]></abbrev-journal-title>
<issn>0120-2804</issn>
<publisher>
<publisher-name><![CDATA[Departamento de Química,  Universidad Nacional de Colombia.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-28042017000100020</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Corrosion inhibition studies of the combined admixture of 1,3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media]]></article-title>
<article-title xml:lang="es"><![CDATA[Estudios de inhibición de la corrosión de la mezcla combinada de 1,3-difenil-2-tiourea y 4-hidroxi-3-metoxibenzaldehido en acero dulce en medio ácido diluido]]></article-title>
<article-title xml:lang="pt"><![CDATA[Estudos de inibição da corrosão da mistura combinada de 1,3-difenil-2-tioureia e 4-hidroxi-3-metoxibenzaldeido em aço macio em meio ácido diluído]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Loto]]></surname>
<given-names><![CDATA[Roland T.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Covenant University Department of Mechanical Engineering ]]></institution>
<addr-line><![CDATA[ Ogun State]]></addr-line>
<country>Nigeria</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Tshwane University of Technology Department of Chemical, Metallurgical b Materials Engineering ]]></institution>
<addr-line><![CDATA[Pretoria ]]></addr-line>
<country>South Africa</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<volume>46</volume>
<numero>1</numero>
<fpage>20</fpage>
<lpage>32</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-28042017000100020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-28042017000100020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-28042017000100020&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The electrochemical corrosion inhibition properties of the combined admixture of 1,3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in 1 M H;SO4 and HC1 acid media were studied through weight loss analysis, potentiodynamic polarization method, optical microscopy and IR spectroscopy. Results showed that the organic mixture effectively inhibited the corrosion of mild steel in both solutions with an optimal inhibition efficiency of 97.4% and 97.47% in H2SO4 from weight loss and potentiodynamic polarization test, while the corresponding values in HC1 were 94 71% and 89.73% respectively. Thermodynamic calculations showed that the compound chemisorbed onto the steel surface blocking the diffusion of corrosive anions Observations from micro-analytical images confirmed the effective inhibition property of the compound and its presence on the surface topography of the steel Infrared spectra revealed the presence of the functional groups of the organic compound responsible for corrosion inhibition The adsorption of the compound was deduced to obey the Langmuir, Frumkin and Freundlich adsorption isotherm.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se estudiaron las propiedades de inhibición de la corrosión electroquímica de la mezcla combinada de 1,3-difenil-2-tiourea y 4-hidroxi-3-metoxibenzaldehido sobre acero dulce en medios de H2SO4 y HC1 1 M mediante análisis de pérdida de peso, método de polarización potenciodinámica, microscopia óptica y espectroscopia IR. Los resultados mostraron que la mezcla inhibe eficazmente la corrosión del acero dulce en ambas soluciones con una eficacia de inhibición óptima de 97,4% y 97,47% en H2SO4, mientras que los valores correspondientes al HC1 son 94,71% y 89,73%. Los cálculos termodinámicos demostraron que el compuesto quimiosorbido sobre la superficie de acero bloquea la difusión de aniones corrosivos Las imágenes micro-anal ticas confirmaron la efectiva propiedad de inhibición del compuesto y su presencia en la topografía superficial del acero. Los espectros infrarrojos revelaron la presencia de los grupos funcionales del compuesto orgánico responsable de la inhibición de la corrosión La adsorción del compuesto se dedujo siguiendo las isotermas de adsorción de Langmuir, Frumkin y Freundlich.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Estudaram-se as propriedades de inibição da corrosão eletroquímica da mistura combinada de 1,3-difenil-2-tioureia e 4-hidroxi-3-metoxibenzaldeido em aço macio em meios de H2SO4 e HC1 1 M através de análise de perda de peso, método de polarização potenciodinâmica, microscopia óptica e espectroscopia de IV. Os resultados mostram que a mistura inibiu eficazmente a corrosão de aço macio em ambas as soluções com uma eficiência de inibição óptima de 97,4% e 97,47% em H2SO4, enquanto os valores correspondentes ao HC1 são respectivamente 94,71% e 89,73%. Os cálculos termodinâmicos mostram que o composto quimisorvido sobre a superfície de aço bloquea a difusão de aniões corrosivos As imagens micro-analíticas confirmam a propriedade de inibição do composto e sua presença na topografia superficial do aço. Os espectros de infravermelho revelaram a presença dos grupos funcionais do composto orgânico responsáveis pela inibição da corrosão. A adsorção do composto foi deduzida seguindo às isotermas de adsorção de Langmuir, Frumkin e Freundlich.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[adsorption]]></kwd>
<kwd lng="en"><![CDATA[corrosion]]></kwd>
<kwd lng="en"><![CDATA[mild steel]]></kwd>
<kwd lng="en"><![CDATA[inhibitor]]></kwd>
<kwd lng="en"><![CDATA[hydrochloric acid]]></kwd>
<kwd lng="en"><![CDATA[sulphuric acid]]></kwd>
<kwd lng="es"><![CDATA[adsorción]]></kwd>
<kwd lng="es"><![CDATA[corrosión]]></kwd>
<kwd lng="es"><![CDATA[acero dulce]]></kwd>
<kwd lng="es"><![CDATA[inhibidor]]></kwd>
<kwd lng="es"><![CDATA[ácido clorhídrico]]></kwd>
<kwd lng="es"><![CDATA[ácido sulfúrico]]></kwd>
<kwd lng="pt"><![CDATA[adsorção]]></kwd>
<kwd lng="pt"><![CDATA[corrosão]]></kwd>
<kwd lng="pt"><![CDATA[aço macio]]></kwd>
<kwd lng="pt"><![CDATA[inibidor]]></kwd>
<kwd lng="pt"><![CDATA[ácido clorídrico]]></kwd>
<kwd lng="pt"><![CDATA[ácido sulfúrico]]></kwd>
</kwd-group>
</article-meta>
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