<?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>S0872-19042021000600431</article-id>
<article-id pub-id-type="doi">10.4152/pea.2021390605</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Corrosion Inhibition of Mild Steel Using Parinari polyandra Leave Extracts in Diluted Hydrochloric Acids]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nwosu]]></surname>
<given-names><![CDATA[F. O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Amusat]]></surname>
<given-names><![CDATA[S. O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of Ilorin Faculty of Physical Sciences Department of Industrial Chemistry]]></institution>
<addr-line><![CDATA[Ilorin ]]></addr-line>
<country>Nigeria</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>39</volume>
<numero>6</numero>
<fpage>431</fpage>
<lpage>449</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0872-19042021000600431&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0872-19042021000600431&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0872-19042021000600431&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Metallic materials remain an indispensable element in industries. The present study is aimed at the assessment of Parinari polyandra leaves inhibition properties on mild steel in a 1 M HCl solution. This was investigated using gravimetric and electrochemical methods. Physicochemical and spectroscopic analyses of the leaves extract were done using standard methods. A yield of 19.82% was obtained, while the leaves extract FTIR spectra showed bands of 3404 cm-1 and 2926 cm-1, which indicated the presence of a strong band of phenolic O-H and C-H stretch functional groups, respectively. A maximum corrosion inhibition efficiency of 97.22% was obtained. Langmuir adsorption isotherm fitted the inhibitor data well. From electrochemical methods, the corrosion rate value of 17.626 mmpy obtained for the uninhibited mild steel was higher than 0.02044 - 2.2267 mmpy range values recorded for the mild steel surface covered with P. polyandra leaves extract in an acidic medium. SEM images showed the leaves extract inhibition effect against mild steel corrosion in a 1 M HCl solution. Electrochemical analysis using the Tafel plot also showed the leaves extract corrosion inhibition capacity, suggesting a mixed type inhibitor. Thus, P. polyandra leaves extract might act as a green corrosion inhibitor for mild steel utilized in industrial applications.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Corrosion]]></kwd>
<kwd lng="en"><![CDATA[Parinary polyandra]]></kwd>
<kwd lng="en"><![CDATA[weight loss studies]]></kwd>
<kwd lng="en"><![CDATA[adsorption isotherm]]></kwd>
<kwd lng="en"><![CDATA[FTIR]]></kwd>
<kwd lng="en"><![CDATA[SEM]]></kwd>
<kwd lng="en"><![CDATA[thermodynamics]]></kwd>
<kwd lng="en"><![CDATA[Tafel plot]]></kwd>
</kwd-group>
</article-meta>
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