<?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>S0872-19042023000600397</article-id>
<article-id pub-id-type="doi">10.4152/pea.2023410601</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Inhibition Action of Cationic Gemini Surfactants on Mild Steel Corrosion in 1 N HCl]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[Hariom K.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of Technology and Applied Sciences Engineering Department ]]></institution>
<addr-line><![CDATA[Salalah ]]></addr-line>
<country>Sultanate of Oman</country>
</aff>
<pub-date pub-type="pub">
<day>31</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>31</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>41</volume>
<numero>6</numero>
<fpage>397</fpage>
<lpage>408</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0872-19042023000600397&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0872-19042023000600397&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0872-19042023000600397&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Corrosion inhibition action of CGS, namely, PPAB, HPAB, DDPAB and HDPAB, on MS in 1 N HCl, has been investigated. The compounds were synthesized in laboratory, and their influence on MS corrosion inhibition was investigated by WL, PDP and EIS techniques. Ea and &#916;Gads values of all compounds were calculated, in order to investigate the corrosion inhibition mechanism. The studies revealed that all the compounds inhibited MS corrosion by blocking its active sites. The inhibitors adsorption onto the MS surface in HCl was found to obey the Langmuir&#8217;s isotherm. CGS IE(%) was found to vary with their nature and C, and the HCl T, IT and C. Maximum IE(%) was 99.7%, for HDPAB (250 ppm), which had the lowest CR, i.e. 0.15 mmy-1.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[adsorption]]></kwd>
<kwd lng="en"><![CDATA[CGS]]></kwd>
<kwd lng="en"><![CDATA[HCl]]></kwd>
<kwd lng="en"><![CDATA[MS]]></kwd>
<kwd lng="en"><![CDATA[WL]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Quraishi]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[HK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Thiazoles as corrosion inhibitors for mild steel in formic and acetic acid solutions]]></article-title>
<source><![CDATA[J Appl Electrochem]]></source>
<year>2005</year>
<volume>35</volume>
<page-range>33-9</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[El-Haddad Mahmoud]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Fouda]]></surname>
<given-names><![CDATA[AS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Corrosion inhibition and adsorption behavior of some azo dye derivatives on carbon steel in acid medium Synergistic effect of halide ions]]></article-title>
<source><![CDATA[Chem Eng Commun]]></source>
<year>2013</year>
<volume>200</volume>
<page-range>1366-93</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mistry Bhupendra]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Smita]]></surname>
<given-names><![CDATA[Jouhri]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Corrosion inhibition of mild steel in 1 N HCl solution by Mercapto-Quinoline Shiff Base]]></article-title>
<source><![CDATA[Chem Eng Commun]]></source>
<year>2014</year>
<volume>201</volume>
<page-range>961-81</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abdallah]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Al-Tass]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Jahdaly]]></surname>
<given-names><![CDATA[BA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Inhibition properties and adsorption behavior of 5-arylazothiazole derivatives on 1018 carbon steel in 0 5 M H2SO4 solution]]></article-title>
<source><![CDATA[J Mol Liq]]></source>
<year>2016</year>
<volume>216</volume>
<page-range>590-7</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Usman]]></surname>
<given-names><![CDATA[BJ]]></given-names>
</name>
<name>
<surname><![CDATA[Ali]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Carbon dioxide corrosion inhibitors a review]]></article-title>
<source><![CDATA[Arab J Sci Eng]]></source>
<year>2018</year>
<volume>43</volume>
<page-range>1-22</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[El Achauri]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Hajji]]></surname>
<given-names><![CDATA[MS]]></given-names>
</name>
<name>
<surname><![CDATA[Kertit]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Some surfactants in the series of 2- (alkyldimethylammonio) alkanol bromides as inhibitors of the corrosion of iron in acid chloride solutions]]></article-title>
<source><![CDATA[Corros Sci]]></source>
<year>1995</year>
<volume>37</volume>
<page-range>381-9</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[El Achauri]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Hajji]]></surname>
<given-names><![CDATA[MS]]></given-names>
</name>
<name>
<surname><![CDATA[Salem]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Some nonionic surfactants as inhibitors of the corrosion of iron in acid chloride solutions]]></article-title>
<source><![CDATA[Corrosion]]></source>
<year>1996</year>
<volume>52</volume>
<page-range>103-8</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Frignani]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Trabanelli]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Zucchi]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<source><![CDATA[On the inhibition action of some N-decyl-pyridinium bromide derivatives on the iron dissolution in 1 N hydrochloric acid solutions. SEIC 5, University, N.S. Sez V, Supl no.7,]]></source>
<year>1980</year>
<publisher-loc><![CDATA[Ferrara ]]></publisher-loc>
<publisher-name><![CDATA[Italy]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brown]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Alan Hatton]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Eastoe]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Magnetic surfactants]]></article-title>
<source><![CDATA[Curr Opin Colloid Interf Sci]]></source>
<year>2015</year>
<volume>20</volume>
<page-range>140-50</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[El Achauri]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Infante]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Synthesis of some cationic gemini surfactants and their inhibitive effect on iron corrosion in hydrochloric acid medium]]></article-title>
<source><![CDATA[Corros Sci]]></source>
<year>2001</year>
<volume>43</volume>
<page-range>19-35</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[El Achauri]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Kertit]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Gauttaya]]></surname>
<given-names><![CDATA[HM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Corrosion inhibition of iron in 1 M HCl by some gemini surfactants in the series of alkanediyl-a, -bis- (dimethyl tetradecyl ammonium bromide)]]></article-title>
<source><![CDATA[Prog Org Coat]]></source>
<year>2001</year>
<volume>43</volume>
<page-range>267-73</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mondal]]></surname>
<given-names><![CDATA[MH]]></given-names>
</name>
<name>
<surname><![CDATA[Roy]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Malik]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Review on chemically bonded geminis with cationic heads second-generation interfactants]]></article-title>
<source><![CDATA[Res Chem Intermed]]></source>
<year>2015</year>
<volume>42</volume>
<page-range>1913-28</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Parikh]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Mistry]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Jana]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Physico-biochemical studies on cationic Gemini surfactants role of spacer]]></article-title>
<source><![CDATA[J Mol Liq]]></source>
<year>2015</year>
<volume>206</volume>
<page-range>19-28</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zana]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Benrraou]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Rueff]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Alkanediyl-alpha,omega bis(dimethylalkylammonium bromide) surfactants. 1. Effect of the spacer chain length on the critical micelle concentration and micelle ionization degree. 15]]></article-title>
<source><![CDATA[Langmuir]]></source>
<year>1991</year>
<volume>7</volume>
<page-range>1072-5</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alami]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Beinert]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Marie]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Alkanediyl alpha,omega-bis(dimethylalkylammonium bromide) surfactants 3. Behavior at the air-water interface]]></article-title>
<source><![CDATA[Langmuir]]></source>
<year>1993</year>
<volume>9</volume>
<page-range>1465-7</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<collab>ASTM (American Society for Testing and Materials)</collab>
<article-title xml:lang=""><![CDATA[Metal corrosion, Erosion and Wear]]></article-title>
<source><![CDATA[Annual Book of ASTM standards]]></source>
<year>1987</year>
<volume>02</volume>
<page-range>G1-72</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schorr]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Yahalom]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The significance of the energy of activation for the dissolution reaction of the metal in acids]]></article-title>
<source><![CDATA[Corros Sci]]></source>
<year>1972</year>
<volume>12</volume>
<page-range>867-8</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vashi]]></surname>
<given-names><![CDATA[RT]]></given-names>
</name>
<name>
<surname><![CDATA[Champaneri]]></surname>
<given-names><![CDATA[VA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Toluidine as corrosion inhibitor for zinc in suphamic acid]]></article-title>
<source><![CDATA[Indian J Chem Technol]]></source>
<year>1997</year>
<volume>4</volume>
<page-range>180-4</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Putilova]]></surname>
<given-names><![CDATA[IN]]></given-names>
</name>
<name>
<surname><![CDATA[Balezin]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
<name>
<surname><![CDATA[Baranic]]></surname>
<given-names><![CDATA[UP]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Metal Corrosion Inhibitors]]></article-title>
<source><![CDATA[New York. Pergamon Press]]></source>
<year>1960</year>
<volume>31</volume>
</nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gomma]]></surname>
<given-names><![CDATA[GK]]></given-names>
</name>
<name>
<surname><![CDATA[Wahadaan]]></surname>
<given-names><![CDATA[MH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Inhibition action of n-decylamine on the dissolution of carbon steel in H2SO4]]></article-title>
<source><![CDATA[Indian J Chem Technol]]></source>
<year>1995</year>
<volume>2</volume>
<page-range>107-10</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ajmal]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Jamal]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Quraishi]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fatty acid oxadiazoles as acid corrosion inhibitors for mild steel]]></article-title>
<source><![CDATA[Anti-Corros Methods Mater]]></source>
<year>2000</year>
<volume>47</volume>
<page-range>77-82</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muralidhran]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Phani]]></surname>
<given-names><![CDATA[KLN]]></given-names>
</name>
<name>
<surname><![CDATA[Pitchumani]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Polyamino-benzoquinone polymers- a new class of corrosion inhibitors for mild steel J Electrochem Soc]]></article-title>
<source><![CDATA[USA]]></source>
<year>1995</year>
<volume>142</volume>
<page-range>1478-83</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hirozawa]]></surname>
<given-names><![CDATA[ST]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Proc 8th Eur Symp Corros Inhib ann]]></article-title>
<source><![CDATA[University, Ferrara, Italy]]></source>
<year>1995</year>
<volume>1</volume>
<page-range>25</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Quraishi]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Rawat]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Ajmal]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Macrocyclic compounds as corrosion inhibitors]]></article-title>
<source><![CDATA[Corrosion]]></source>
<year>1998</year>
<volume>54</volume>
<page-range>996-1002</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ansari]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Aslam]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Siddiqui]]></surname>
<given-names><![CDATA[U]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Micellar growth of m-2-m type gemini surfactants (m=10, 12, 14) with higher chain length alcohols/amines (C6-C8) in the absence and presence of organic salts (sodium salicylate, sodium tosylate)]]></article-title>
<source><![CDATA[J Mol Liq]]></source>
<year>2012</year>
<volume>174</volume>
<page-range>5-10</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
