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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<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>
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<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>
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<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>
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<extent unit="figures">6</extent>
<extent unit="tables">1</extent>
<extent unit="references">47</extent>
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<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. KGaA, Weinheim</accessCondition>
<recordInfo><recordContentSource>WILEY</recordContentSource>
<recordOrigin>WILEY‐VCH Verlag</recordOrigin>
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