Effect of (R+, X–) salts addition on nickel corrosion in 1M sulfuric acid medium
Identifieur interne : 000335 ( Istex/Corpus ); précédent : 000334; suivant : 000336Effect of (R+, X–) salts addition on nickel corrosion in 1M sulfuric acid medium
Auteurs : F. Said ; N. Souissi ; A. Dermaj ; N. Hajjaji ; E. Triki ; A. SrhiriSource :
- Materials and Corrosion [ 0947-5117 ] ; 2005-09.
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Abstract
We used the electrochemical techniques to study the effect of the addition of four salts, K+,Cl−, K+,Br−, K+,I− and C8H17Ph3P+,I−, on the corrosion behaviour of nickel when submitted to 1M sulphuric acid medium. After one hour of immersion time, we noted an acceleration of nickel corrosion process after the addition of K+,Cl− and K+,Br− in the 1M H2SO4 electrolyte. K+,I− exhibited an inhibition of the anodic Ni corrosion process whereas the phosphonium iodine (R+,I−) acts simultaneously on both processes: it is a mixed inhibitor. Such result is due to the adsorption of the alkyl group C8H17 which limited oxygen diffusion. EIS characterization of Ni exhibited surfaces after iodine salts addition allowed us simulating the resulting interfaces by electrical equivalent circuits. We concluded that (K+,I−) addition decreased the material corrosion rate without changing the alteration mechanism. That result is due to the formation of NiI at the electrode surface. On the other hand, phosphonium iodine addition modifies the interface behaviour. In fact, the alkyl part of the organic iodine adsorbs at the surface preserving it against the corrosive action of the sulfuric acid.
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DOI: 10.1002/maco.200503863
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Said</name><affiliation><mods:affiliation>E-mail: fatsaid@yahoo.fr</mods:affiliation></affiliation></author><author><name sortKey="Souissi, N" sort="Souissi, N" uniqKey="Souissi N" first="N." last="Souissi">N. Souissi</name><affiliation><mods:affiliation>Unité de Recherche “Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 37, Le Belvédère 1002 (Tunisie)</mods:affiliation></affiliation></author><author><name sortKey="Dermaj, A" sort="Dermaj, A" uniqKey="Dermaj A" first="A." last="Dermaj">A. Dermaj</name><affiliation><mods:affiliation>Laboratoire de Synthèse Organique et de Réactivité, Électrochimique, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</mods:affiliation></affiliation></author><author><name sortKey="Hajjaji, N" sort="Hajjaji, N" uniqKey="Hajjaji N" first="N." last="Hajjaji">N. Hajjaji</name><affiliation><mods:affiliation>Laboratoire de Synthèse Organique et de Réactivité, Électrochimique, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</mods:affiliation></affiliation></author><author><name sortKey="Triki, E" sort="Triki, E" uniqKey="Triki E" first="E." last="Triki">E. Triki</name><affiliation><mods:affiliation>Unité de Recherche “Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 37, Le Belvédère 1002 (Tunisie)</mods:affiliation></affiliation></author><author><name sortKey="Srhiri, A" sort="Srhiri, A" uniqKey="Srhiri A" first="A." last="Srhiri">A. Srhiri</name><affiliation><mods:affiliation>Laboratoire d'Électrochimie, des Études de Corrosion & d'Environnement, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Materials and Corrosion</title><title level="j" type="abbrev">Materials and Corrosion</title><idno type="ISSN">0947-5117</idno><idno type="eISSN">1521-4176</idno><imprint><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Weinheim</pubPlace><date type="published" when="2005-09">2005-09</date><biblScope unit="volume">56</biblScope><biblScope unit="issue">9</biblScope><biblScope unit="page" from="619">619</biblScope><biblScope unit="page" to="623">623</biblScope></imprint><idno type="ISSN">0947-5117</idno></series><idno type="istex">5537F961927325C9E47F40C76C04A946398A96BC</idno><idno type="DOI">10.1002/maco.200503863</idno><idno type="ArticleID">MACO200503863</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0947-5117</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>corrosion inhibition</term><term>electrochemical impedance spectroscopy</term><term>interface behaviour</term><term>nickel</term><term>polarization curve</term><term>sulphuric acid</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We used the electrochemical techniques to study the effect of the addition of four salts, K+,Cl−, K+,Br−, K+,I− and C8H17Ph3P+,I−, on the corrosion behaviour of nickel when submitted to 1M sulphuric acid medium. After one hour of immersion time, we noted an acceleration of nickel corrosion process after the addition of K+,Cl− and K+,Br− in the 1M H2SO4 electrolyte. K+,I− exhibited an inhibition of the anodic Ni corrosion process whereas the phosphonium iodine (R+,I−) acts simultaneously on both processes: it is a mixed inhibitor. Such result is due to the adsorption of the alkyl group C8H17 which limited oxygen diffusion. EIS characterization of Ni exhibited surfaces after iodine salts addition allowed us simulating the resulting interfaces by electrical equivalent circuits. We concluded that (K+,I−) addition decreased the material corrosion rate without changing the alteration mechanism. That result is due to the formation of NiI at the electrode surface. On the other hand, phosphonium iodine addition modifies the interface behaviour. In fact, the alkyl part of the organic iodine adsorbs at the surface preserving it against the corrosive action of the sulfuric acid.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>F. Said</name><affiliations><json:string>E-mail: fatsaid@yahoo.fr</json:string></affiliations></json:item><json:item><name>N. Souissi</name><affiliations><json:string>Unité de Recherche “Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 37, Le Belvédère 1002 (Tunisie)</json:string></affiliations></json:item><json:item><name>A. Dermaj</name><affiliations><json:string>Laboratoire de Synthèse Organique et de Réactivité, Électrochimique, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</json:string></affiliations></json:item><json:item><name>N. Hajjaji</name><affiliations><json:string>Laboratoire de Synthèse Organique et de Réactivité, Électrochimique, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</json:string></affiliations></json:item><json:item><name>E. Triki</name><affiliations><json:string>Unité de Recherche “Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 37, Le Belvédère 1002 (Tunisie)</json:string></affiliations></json:item><json:item><name>A. Srhiri</name><affiliations><json:string>Laboratoire d'Électrochimie, des Études de Corrosion & d'Environnement, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>corrosion inhibition</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>nickel</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>polarization curve</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>electrochemical impedance spectroscopy</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>sulphuric acid</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>interface behaviour</value></json:item></subject><articleId><json:string>MACO200503863</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>We used the electrochemical techniques to study the effect of the addition of four salts, K+,Cl−, K+,Br−, K+,I− and C8H17Ph3P+,I−, on the corrosion behaviour of nickel when submitted to 1M sulphuric acid medium. After one hour of immersion time, we noted an acceleration of nickel corrosion process after the addition of K+,Cl− and K+,Br− in the 1M H2SO4 electrolyte. K+,I− exhibited an inhibition of the anodic Ni corrosion process whereas the phosphonium iodine (R+,I−) acts simultaneously on both processes: it is a mixed inhibitor. Such result is due to the adsorption of the alkyl group C8H17 which limited oxygen diffusion. EIS characterization of Ni exhibited surfaces after iodine salts addition allowed us simulating the resulting interfaces by electrical equivalent circuits. We concluded that (K+,I−) addition decreased the material corrosion rate without changing the alteration mechanism. That result is due to the formation of NiI at the electrode surface. On the other hand, phosphonium iodine addition modifies the interface behaviour. In fact, the alkyl part of the organic iodine adsorbs at the surface preserving it against the corrosive action of the sulfuric acid.</abstract><qualityIndicators><score>4.93</score><pdfVersion>1.3</pdfVersion><pdfPageSize>595 x 842 pts (A4)</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1185</abstractCharCount><pdfWordCount>2746</pdfWordCount><pdfCharCount>15844</pdfCharCount><pdfPageCount>5</pdfPageCount><abstractWordCount>182</abstractWordCount></qualityIndicators><title>Effect of (R+, X–) salts addition on nickel corrosion in 1M sulfuric acid medium</title><genre><json:string>article</json:string></genre><host><volume>56</volume><publisherId><json:string>MACO</json:string></publisherId><pages><total>5</total><last>623</last><first>619</first></pages><issn><json:string>0947-5117</json:string></issn><issue>9</issue><subject><json:item><value>Article</value></json:item></subject><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>1521-4176</json:string></eissn><title>Materials and Corrosion</title><doi><json:string>10.1002/(ISSN)1521-4176</json:string></doi></host><categories><wos><json:string>science</json:string><json:string>metallurgy & metallurgical engineering</json:string><json:string>materials science, multidisciplinary</json:string></wos><scienceMetrix><json:string>applied sciences</json:string><json:string>enabling & strategic technologies</json:string><json:string>energy</json:string></scienceMetrix><inist><json:string>sciences appliquees, technologies et medecines</json:string><json:string>sciences biologiques et medicales</json:string><json:string>sciences biologiques fondamentales et appliquees. psychologie</json:string><json:string>biochimie analytique, structurale et metabolique</json:string></inist></categories><publicationDate>2005</publicationDate><copyrightDate>2005</copyrightDate><doi><json:string>10.1002/maco.200503863</json:string></doi><id>5537F961927325C9E47F40C76C04A946398A96BC</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/5537F961927325C9E47F40C76C04A946398A96BC/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/5537F961927325C9E47F40C76C04A946398A96BC/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/5537F961927325C9E47F40C76C04A946398A96BC/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Effect of (R+, X–) salts addition on nickel corrosion in 1M sulfuric acid medium</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Weinheim</pubPlace><availability><p>Copyright © 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</p></availability><date>2005</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Effect of (R+, X–) salts addition on nickel corrosion in 1M sulfuric acid medium</title><author xml:id="author-1"><persName><forename type="first">F.</forename><surname>Said</surname></persName><email>fatsaid@yahoo.fr</email></author><author xml:id="author-2"><persName><forename type="first">N.</forename><surname>Souissi</surname></persName><affiliation>Unité de Recherche “Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 37, Le Belvédère 1002 (Tunisie)</affiliation></author><author xml:id="author-3"><persName><forename type="first">A.</forename><surname>Dermaj</surname></persName><affiliation>Laboratoire de Synthèse Organique et de Réactivité, Électrochimique, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</affiliation></author><author xml:id="author-4"><persName><forename type="first">N.</forename><surname>Hajjaji</surname></persName><affiliation>Laboratoire de Synthèse Organique et de Réactivité, Électrochimique, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</affiliation></author><author xml:id="author-5"><persName><forename type="first">E.</forename><surname>Triki</surname></persName><affiliation>Unité de Recherche “Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 37, Le Belvédère 1002 (Tunisie)</affiliation></author><author xml:id="author-6"><persName><forename type="first">A.</forename><surname>Srhiri</surname></persName><affiliation>Laboratoire d'Électrochimie, des Études de Corrosion & d'Environnement, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</affiliation></author></analytic><monogr><title level="j">Materials and Corrosion</title><title level="j" type="abbrev">Materials and Corrosion</title><idno type="pISSN">0947-5117</idno><idno type="eISSN">1521-4176</idno><idno type="DOI">10.1002/(ISSN)1521-4176</idno><imprint><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Weinheim</pubPlace><date type="published" when="2005-09"></date><biblScope unit="volume">56</biblScope><biblScope unit="issue">9</biblScope><biblScope unit="page" from="619">619</biblScope><biblScope unit="page" to="623">623</biblScope></imprint></monogr><idno type="istex">5537F961927325C9E47F40C76C04A946398A96BC</idno><idno type="DOI">10.1002/maco.200503863</idno><idno type="ArticleID">MACO200503863</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2005</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>We used the electrochemical techniques to study the effect of the addition of four salts, K+,Cl−, K+,Br−, K+,I− and C8H17Ph3P+,I−, on the corrosion behaviour of nickel when submitted to 1M sulphuric acid medium. After one hour of immersion time, we noted an acceleration of nickel corrosion process after the addition of K+,Cl− and K+,Br− in the 1M H2SO4 electrolyte. K+,I− exhibited an inhibition of the anodic Ni corrosion process whereas the phosphonium iodine (R+,I−) acts simultaneously on both processes: it is a mixed inhibitor. Such result is due to the adsorption of the alkyl group C8H17 which limited oxygen diffusion. EIS characterization of Ni exhibited surfaces after iodine salts addition allowed us simulating the resulting interfaces by electrical equivalent circuits. We concluded that (K+,I−) addition decreased the material corrosion rate without changing the alteration mechanism. That result is due to the formation of NiI at the electrode surface. On the other hand, phosphonium iodine addition modifies the interface behaviour. In fact, the alkyl part of the organic iodine adsorbs at the surface preserving it against the corrosive action of the sulfuric acid.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>corrosion inhibition</term></item><item><term>nickel</term></item><item><term>polarization curve</term></item><item><term>electrochemical impedance spectroscopy</term></item><item><term>sulphuric acid</term></item><item><term>interface behaviour</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Article</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2005-02-13">Received</change><change when="2005-09">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/5537F961927325C9E47F40C76C04A946398A96BC/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>WILEY‐VCH Verlag</publisherName><publisherLoc>Weinheim</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1521-4176</doi><issn type="print">0947-5117</issn><issn type="electronic">1521-4176</issn><idGroup><id type="product" value="MACO"></id></idGroup><titleGroup><title type="main" xml:lang="en">Materials and Corrosion</title><title type="tocForm">Materials and Corrosion / Werkstoffe und Korrosion</title><title type="short">Materials and Corrosion</title></titleGroup></publicationMeta><publicationMeta level="part" position="90"><doi origin="wiley" registered="yes">10.1002/maco.v56:9</doi><numberingGroup><numbering type="journalVolume" number="56">56</numbering><numbering type="journalIssue">9</numbering></numberingGroup><coverDate startDate="2005-09">September 2005</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="6" status="forIssue"><doi origin="wiley" registered="yes">10.1002/maco.200503863</doi><idGroup><id type="unit" value="MACO200503863"></id></idGroup><countGroup><count type="pageTotal" number="5"></count></countGroup><titleGroup><title type="articleCategory">Article</title></titleGroup><copyright ownership="publisher">Copyright © 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</copyright><eventGroup><event type="manuscriptReceived" date="2005-02-13"></event><event type="firstOnline" date="2005-09-14"></event><event type="publishedOnlineFinalForm" date="2005-09-14"></event><event type="xmlConverted" agent="Converter:JWSART34_TO_WML3G version:2.3.2 mode:FullText source:HeaderRef result:HeaderRef" date="2010-03-10"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-02-02"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-31"></event></eventGroup><numberingGroup><numbering type="pageFirst">619</numbering><numbering type="pageLast">623</numbering></numberingGroup><linkGroup><link type="toTypesetVersion" href="file:MACO.MACO619.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="6"></count><count type="tableTotal" number="1"></count><count type="referenceTotal" number="47"></count></countGroup><titleGroup><title type="main" xml:lang="en">Effect of (R<sup>+</sup>, X<sup>–</sup>) salts addition on nickel corrosion in 1M sulfuric acid medium</title></titleGroup><creators><creator xml:id="au1" creatorRole="author"><personName><givenNames>F.</givenNames><familyName>Said</familyName></personName><contactDetails><email>fatsaid@yahoo.fr</email></contactDetails></creator><creator xml:id="au2" creatorRole="author" affiliationRef="#a2"><personName><givenNames>N.</givenNames><familyName>Souissi</familyName></personName></creator><creator xml:id="au3" creatorRole="author" affiliationRef="#a3"><personName><givenNames>A.</givenNames><familyName>Dermaj</familyName></personName></creator><creator xml:id="au4" creatorRole="author" affiliationRef="#a3"><personName><givenNames>N.</givenNames><familyName>Hajjaji</familyName></personName></creator><creator xml:id="au5" creatorRole="author" affiliationRef="#a2"><personName><givenNames>E.</givenNames><familyName>Triki</familyName></personName></creator><creator xml:id="au6" creatorRole="author" affiliationRef="#a1"><personName><givenNames>A.</givenNames><familyName>Srhiri</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="TN" type="organization"><unparsedAffiliation>Laboratoire d'Électrochimie, des Études de Corrosion & d'Environnement, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="TN" type="organization"><unparsedAffiliation>Unité de Recherche “Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 37, Le Belvédère 1002 (Tunisie)</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="MA" type="organization"><unparsedAffiliation>Laboratoire de Synthèse Organique et de Réactivité, Électrochimique, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en" type="author"><keyword xml:id="kwd1">corrosion inhibition</keyword><keyword xml:id="kwd2">nickel</keyword><keyword xml:id="kwd3">polarization curve</keyword><keyword xml:id="kwd4">electrochemical impedance spectroscopy</keyword><keyword xml:id="kwd5">sulphuric acid</keyword><keyword xml:id="kwd6">interface behaviour</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>We used the electrochemical techniques to study the effect of the addition of four salts, K<sup>+</sup>,Cl<sup>−</sup>, K<sup>+</sup>,Br<sup>−</sup>, K<sup>+</sup>,I<sup>−</sup> and C<sub>8</sub>H<sub>17</sub>Ph<sub>3</sub>P<sup>+</sup>,I<sup>−</sup>, on the corrosion behaviour of nickel when submitted to 1M sulphuric acid medium. After one hour of immersion time, we noted an acceleration of nickel corrosion process after the addition of K<sup>+</sup>,Cl<sup>−</sup> and K<sup>+</sup>,Br<sup>−</sup> in the 1M H<sub>2</sub>SO<sub>4</sub> electrolyte. K<sup>+</sup>,I<sup>−</sup> exhibited an inhibition of the anodic Ni corrosion process whereas the phosphonium iodine (R<sup>+</sup>,I<sup>−</sup>) acts simultaneously on both processes: it is a mixed inhibitor. Such result is due to the adsorption of the alkyl group C<sub>8</sub>H<sub>17</sub> which limited oxygen diffusion.</p><p>EIS characterization of Ni exhibited surfaces after iodine salts addition allowed us simulating the resulting interfaces by electrical equivalent circuits. We concluded that (K<sup>+</sup>,I<sup>−</sup>) addition decreased the material corrosion rate without changing the alteration mechanism. That result is due to the formation of NiI at the electrode surface. On the other hand, phosphonium iodine addition modifies the interface behaviour. In fact, the alkyl part of the organic iodine adsorbs at the surface preserving it against the corrosive action of the sulfuric acid.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Effect of (R+, X–) salts addition on nickel corrosion in 1M sulfuric acid medium</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Effect of (R+, X–) salts addition on nickel corrosion in 1M sulfuric acid medium</title></titleInfo><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Said</namePart><affiliation>E-mail: fatsaid@yahoo.fr</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N.</namePart><namePart type="family">Souissi</namePart><affiliation>Unité de Recherche “Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 37, Le Belvédère 1002 (Tunisie)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Dermaj</namePart><affiliation>Laboratoire de Synthèse Organique et de Réactivité, Électrochimique, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N.</namePart><namePart type="family">Hajjaji</namePart><affiliation>Laboratoire de Synthèse Organique et de Réactivité, Électrochimique, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Triki</namePart><affiliation>Unité de Recherche “Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 37, Le Belvédère 1002 (Tunisie)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Srhiri</namePart><affiliation>Laboratoire d'Électrochimie, des Études de Corrosion & d'Environnement, Faculté des Sciences de Kénitra, BP 133, Kénitra 14000 (Maroc)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>WILEY‐VCH Verlag</publisher><place><placeTerm type="text">Weinheim</placeTerm></place><dateIssued encoding="w3cdtf">2005-09</dateIssued><dateCaptured encoding="w3cdtf">2005-02-13</dateCaptured><copyrightDate encoding="w3cdtf">2005</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">6</extent><extent unit="tables">1</extent><extent unit="references">47</extent></physicalDescription><abstract lang="en">We used the electrochemical techniques to study the effect of the addition of four salts, K+,Cl−, K+,Br−, K+,I− and C8H17Ph3P+,I−, on the corrosion behaviour of nickel when submitted to 1M sulphuric acid medium. After one hour of immersion time, we noted an acceleration of nickel corrosion process after the addition of K+,Cl− and K+,Br− in the 1M H2SO4 electrolyte. K+,I− exhibited an inhibition of the anodic Ni corrosion process whereas the phosphonium iodine (R+,I−) acts simultaneously on both processes: it is a mixed inhibitor. Such result is due to the adsorption of the alkyl group C8H17 which limited oxygen diffusion. EIS characterization of Ni exhibited surfaces after iodine salts addition allowed us simulating the resulting interfaces by electrical equivalent circuits. We concluded that (K+,I−) addition decreased the material corrosion rate without changing the alteration mechanism. That result is due to the formation of NiI at the electrode surface. On the other hand, phosphonium iodine addition modifies the interface behaviour. In fact, the alkyl part of the organic iodine adsorbs at the surface preserving it against the corrosive action of the sulfuric acid.</abstract><subject lang="en"><genre>keywords</genre><topic>corrosion inhibition</topic><topic>nickel</topic><topic>polarization curve</topic><topic>electrochemical impedance spectroscopy</topic><topic>sulphuric acid</topic><topic>interface behaviour</topic></subject><relatedItem type="host"><titleInfo><title>Materials and Corrosion</title></titleInfo><titleInfo type="abbreviated"><title>Materials and Corrosion</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Article</topic></subject><identifier type="ISSN">0947-5117</identifier><identifier type="eISSN">1521-4176</identifier><identifier type="DOI">10.1002/(ISSN)1521-4176</identifier><identifier type="PublisherID">MACO</identifier><part><date>2005</date><detail type="volume"><caption>vol.</caption><number>56</number></detail><detail type="issue"><caption>no.</caption><number>9</number></detail><extent unit="pages"><start>619</start><end>623</end><total>5</total></extent></part></relatedItem><identifier type="istex">5537F961927325C9E47F40C76C04A946398A96BC</identifier><identifier type="DOI">10.1002/maco.200503863</identifier><identifier type="ArticleID">MACO200503863</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2005 WILEY‐VCH Verlag GmbH & Co. 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