<?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>S0872-19042023000200151</article-id>
<article-id pub-id-type="doi">10.4152/pea.2023410204</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Mild Steel Corrosion Inhibition in 1 M HCl by an Alcoholic Extract of Sargassum Muticum]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jeslina]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kirubavathy]]></surname>
<given-names><![CDATA[S. Jone]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Al-Hashem]]></surname>
<given-names><![CDATA[Abdulhameed]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rajendran]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Joany]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lacnjevac]]></surname>
<given-names><![CDATA[Caslav]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Krishnammal College for Women PG and Research Department of Chemistry ]]></institution>
<addr-line><![CDATA[Coimbatore ]]></addr-line>
<country>India</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Kuwait Institute for Scientific Research Petroleum Research Centre ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Kuwait</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,St. Antony&#8217;s College of Arts and Sciences for Women PG Department of Chemistry, Corrosion Research Centre ]]></institution>
<addr-line><![CDATA[Tamil Nadu ]]></addr-line>
<country>India</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Sathyabama University Department of ECE ]]></institution>
<addr-line><![CDATA[Tamil Nadu ]]></addr-line>
<country>India</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,University of Belgrade Faculty of Agriculture ]]></institution>
<addr-line><![CDATA[Belgrade ]]></addr-line>
<country>Serbia</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Pondicherry University  ]]></institution>
<addr-line><![CDATA[Puducherry ]]></addr-line>
<country>India</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<volume>41</volume>
<numero>2</numero>
<fpage>151</fpage>
<lpage>165</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0872-19042023000200151&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0872-19042023000200151&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0872-19042023000200151&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The inhibitive effect of a seaweed (SM) alcoholic extract on MS corrosion immersed in 1 M HCl, for 30 min, was evaluated by the WL method and PPD technique. The protective film was investigated by the Vickers hardness test. WL revealed that 500 ppm SM offered 84 % IE against MS corrosion in 1 M HCl. The inhibitor molecules adsorption onto the metal surface obeyed Langmuir&#8217;s adsorption isotherm. The R2 value was very high (0.998). The PPD study showed that Ecorr slightly shifted to the anodic side. It was inferred that SM functions as a mixed type of corrosion inhibitor, since the shifts were relatively small. In SM presence, LPR value increased and Icorr decreased. Due to the blanket effect (formation of a protective film on the metallic surface, which was found to be a monolayer, blocking anodic and cathodic sites), the electrons transfer from the metal into the solution was blocked. Vickers hardness of the inhibited MS surface was lower than that of the polished one, but higher than that of the corroded one. The outcome of the study may be used in the pickling industry, where HCl is used to remove the rust from the metal surface, simultaneously not attacking it.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[corrosion inhibition]]></kwd>
<kwd lng="en"><![CDATA[green inhibition]]></kwd>
<kwd lng="en"><![CDATA[acidic medium]]></kwd>
<kwd lng="en"><![CDATA[SM]]></kwd>
<kwd lng="en"><![CDATA[Vickers hardness]]></kwd>
<kwd lng="en"><![CDATA[isotherms and electrochemical studies]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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