Pub Date : 2006-11-08DOI: 10.4314/NJCR.V10I1.35625
.. D.Zerouali, .. Z.Derriche, .. M.Y.Azri
Corrosion induced by elemental mercury in aqueous media of industrial Aluminium alloys AA5083 used in heat exchanger industries of natural gas liquefaction has been studied by linear sweep voltammetry on rotating amalgamated disk electrode. Corrosion process depends on: • Chemical processes of amalgamation of aluminium with mercury. • Diffusion process of aluminium in amalgam. • Electrochemical oxidation of aluminium on amalgamated Interface/water. The diffusion step appears different from that usually found in studies of aqueous corrosion and was not dependent on rotation of electrode but on diffusion of dissolved aluminium in the amalgam before the electrochemical oxidation of amalgamated metal. This is the limiting step of the process at stationary phase of the chemical amalgamation. This occurs at contact time mercury-aluminium longer than 36 min .For shorter times less than 30 min, chemical amalgamation controlled the process. Characteristic parameters of electrochemical behaviour of amalgamated electrodes were investigated: time of cathodic deposit of mercury, time of immersion of electrode in electrolyte before polarisation as well as potential scanning rate. Nigerian Journal of Chemical Research Vol. 10, 2005: 39-48
{"title":"Contribution to comprehensive study of aluminium alloy Aa 5083 corrosion induced by elemental mercury in LNG industries","authors":".. D.Zerouali, .. Z.Derriche, .. M.Y.Azri","doi":"10.4314/NJCR.V10I1.35625","DOIUrl":"https://doi.org/10.4314/NJCR.V10I1.35625","url":null,"abstract":"Corrosion induced by elemental mercury in aqueous media of industrial Aluminium alloys AA5083 used in heat exchanger industries of natural gas liquefaction has been studied by linear sweep voltammetry on rotating amalgamated disk electrode. Corrosion process depends on: • Chemical processes of amalgamation of aluminium with mercury. • Diffusion process of aluminium in amalgam. • Electrochemical oxidation of aluminium on amalgamated Interface/water. The diffusion step appears different from that usually found in studies of aqueous corrosion and was not dependent on rotation of electrode but on diffusion of dissolved aluminium in the amalgam before the electrochemical oxidation of amalgamated metal. This is the limiting step of the process at stationary phase of the chemical amalgamation. This occurs at contact time mercury-aluminium longer than 36 min .For shorter times less than 30 min, chemical amalgamation controlled the process. Characteristic parameters of electrochemical behaviour of amalgamated electrodes were investigated: time of cathodic deposit of mercury, time of immersion of electrode in electrolyte before polarisation as well as potential scanning rate. Nigerian Journal of Chemical Research Vol. 10, 2005: 39-48","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127163847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Trends in photochemically induced stripping of palm oil","authors":"K. Ekpenyong, E. Essien, Z. Ibrahim, O. Obaje","doi":"10.4314/NJCR.V1I1.35615","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35615","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122007608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Assessment of active carbon derived from maize cobs for decolorising textile effluents","authors":"E. Ekanem","doi":"10.4314/NJCR.V1I1.35619","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35619","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128415166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Kinetics and mechanism of the oxidation of acetaldehyde by bromate ion in aqueous perchloric acid","authors":"Yn Lohdip, AK Davies, J. Iyun","doi":"10.4314/NJCR.V1I1.35617","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35617","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133389445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparison of the characteristic parameters and deterioration properties of oils from the tenera and dura varieties of the oil palm","authors":"O. Ekpa, U. Ekpe","doi":"10.4314/NJCR.V1I1.35613","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35613","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117117081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Analysis of environmental violations by some textile industries in Nigeria","authors":"E. Ekanem, B. Fodeke","doi":"10.4314/NJCR.V1I1.35609","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35609","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126700745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Copper (II), nickel (II) and cobalt (II) complexes of n-aminoalkylaminomethanephosphonic acids, (n-ampa)","authors":"L. Durosinmi, Iao Oje, J. Ige","doi":"10.4314/NJCR.V1I1.35618","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35618","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123011851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Application of animal dung for decolorising textile effulents","authors":"E. Ekanem","doi":"10.4314/NJCR.V1I1.35611","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35611","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126471763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of concentration, temperature, and pH on oleate adsorption at a Nigerian baryte-water interface","authors":"O. Ofor, C. Nwoko","doi":"10.4314/NJCR.V1I1.35612","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35612","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131602399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of coconut oil concentration on the melting point profile and free fatty acid formation of palm oil","authors":"O. Ekpa, U. Ekpe","doi":"10.4314/NJCR.V1I1.35610","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35610","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125073232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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