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Experimental and Theoretical Studies of Hydroxyethyl Cellulose as Inhibitor for Acid Corrosion Inhibition of Mild Steel and Aluminium 羟乙基纤维素作为缓蚀剂对低碳钢和铝酸蚀的实验与理论研究
The Open Corrosion Journal Pub Date : 2014-02-07 DOI: 10.2174/1876503301406010001
I. Arukalam, I. Madufor, O. Ogbobe, Emeka Emanuel Oguzie
{"title":"Experimental and Theoretical Studies of Hydroxyethyl Cellulose as Inhibitor for Acid Corrosion Inhibition of Mild Steel and Aluminium","authors":"I. Arukalam, I. Madufor, O. Ogbobe, Emeka Emanuel Oguzie","doi":"10.2174/1876503301406010001","DOIUrl":"https://doi.org/10.2174/1876503301406010001","url":null,"abstract":"Hydroxyethyl cellulose (HEC) was studied as corrosion inhibitor for mild steel and aluminium in 0.5 M H 2 SO 4 solution using weight loss and electrochemical techniques. The results revealed that HEC inhibited corrosion of mild steel and aluminium in sulphuric acid environment. Inhibition efficiency was found to depend on concentration of the inhibitor. Impedance results revealed that HEC was adsorbed on the corroding metal surface while polarization results show that HEC inhibited both anodic and cathodic reactions of mild steel but showed anodic dissolution reaction on aluminium due to destabilization of the passive oxide film on the Al surface and inhibited only cathodic reaction. Inhibition of corrosion reaction in the acidic medium by adsorption on the metal/solution interface follows Langmuir and Freundlich adsorption isotherms. Also, inhibition efficiency increased with rise in temperature. Local reactivity of the HEC molecule was analyzed theoretically using the density functional theory. The theoretical predictions showed good agreement with experimental results.","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126177718","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}
引用次数: 38
Corrosion Inhibition by an Ion Pair Reagent-Zn2+ System 离子对试剂- zn2 +体系的缓蚀作用
The Open Corrosion Journal Pub Date : 2012-02-02 DOI: 10.2174/1876503301205010001
C. Anbarasi
{"title":"Corrosion Inhibition by an Ion Pair Reagent-Zn2+ System","authors":"C. Anbarasi","doi":"10.2174/1876503301205010001","DOIUrl":"https://doi.org/10.2174/1876503301205010001","url":null,"abstract":"Inhibition of corrosion of carbon steel in dam water (Tamil Nadu, India) by Pentane sulphonicacid as its sodium salt (SPS)-Zinc ion system has been studied using weight-loss and potentiodynamic polarization methods. Results of weight loss method indicated that inhibition efficiency (IE) increased with increasing inhibitor concentration. Polarization study reveals that SPS-Zn 2+ system functions as a cathodic inhibitor. AC impedance spectra reveal that a protective film is formed on the metal surface. The nature of protective film formed on the metal surface has been analysed by FTIR spectra and AFM analysis. From the results of above studies a suitable mechanism for corrosion inhibition is proposed.","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122037293","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}
引用次数: 9
Analysis of stray current induced by cathodic protection on steel-framed masonry structures 钢框架砌体结构阴极保护产生的杂散电流分析
The Open Corrosion Journal Pub Date : 2011-11-04 DOI: 10.2174/1876503301104010034
Y. Wu, Paul Lambert, P. Mangat, F. O’Flaherty
{"title":"Analysis of stray current induced by cathodic protection on steel-framed masonry structures","authors":"Y. Wu, Paul Lambert, P. Mangat, F. O’Flaherty","doi":"10.2174/1876503301104010034","DOIUrl":"https://doi.org/10.2174/1876503301104010034","url":null,"abstract":"Cathodic protection (CP) has been successfully employed to protect steel-framed masonry buildings from corrosion related damage. When a CP system is installed to protect the structural members, other metallic items which are within the fabric of the structure but are not in direct electrical continuity may suffer from stray current interactions, resulting in accelerated corrosion of the discontinuous items. Therefore, these must be considered when CP systems are designed prior to installation. \u0000This paper presents both experimental and numerical studies into the risk and extent of stray current corrosion in steel-framed masonry structures when subject to impressed current cathodic protection. The objective is to allow CP \u0000systems to be optimised so that interference is minimised without compromising the technical or cost benefits of this method of corrosion control.","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115659446","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}
引用次数: 6
Chromium Deposition on Cobalt-Based Alloys by Pack-Cementation and Behaviour of the Coated Alloys in High Temperature Oxidation 铬在钴基合金上的包埋沉积及其高温氧化行为
The Open Corrosion Journal Pub Date : 2011-10-21 DOI: 10.2174/1876503301104010027
G. Michel, P. Berthod, S. Mathieu, M. Vilasi, P. Steinmetz
{"title":"Chromium Deposition on Cobalt-Based Alloys by Pack-Cementation and Behaviour of the Coated Alloys in High Temperature Oxidation","authors":"G. Michel, P. Berthod, S. Mathieu, M. Vilasi, P. Steinmetz","doi":"10.2174/1876503301104010027","DOIUrl":"https://doi.org/10.2174/1876503301104010027","url":null,"abstract":"Two TaC-strengthened cobalt-based alloys, with compositions Co-10Cr-0.25C-4.4Ta and Co-10Cr-0.5C-8.7Ta (wt.%) underwent Cr-deposition by pack-cementation, followed by heat-treatment to allow Cr diffusing deeper in their sub-surface. Thereafter they were tested for 50 hours at 1200°C in a thermobalance. These alloys were successfully enriched in chromium, with a maximal content on surface of about 30wt.% and a depth of enrichment of several hundreds of micrometers. This allowed a chromia-forming behavior of the cemented alloys despite the 10wt.%Cr of the bulk. This was especially true for the {C,Ta}-richest alloy the oxidation kinetic of which was wholly parabolic and analogous to a Ni-30Cr alloy known for its good behavior in oxidation at 1200°C. The parabolic constants and chromia-volatilization constants were at the same levels of the Ni-30Cr ones. However, the chromium enrichment step, especially the diffusion heat-treatment following the cementation, causes fragmentation and surface fraction reduction of the tantalum carbides which strengthen the alloy.","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"62 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114018981","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}
引用次数: 4
The Protection Performance of Polypyrrole Coating Doped with Different Counter Anions for the Corrosion of NiTi Alloy 掺不同负离子聚吡咯涂层对NiTi合金腐蚀的防护性能
The Open Corrosion Journal Pub Date : 2011-03-22 DOI: 10.2174/1876503301104010018
K. Qi, Zhenyu Chen, Guoan Zhang, Xingpeng Guo
{"title":"The Protection Performance of Polypyrrole Coating Doped with Different Counter Anions for the Corrosion of NiTi Alloy","authors":"K. Qi, Zhenyu Chen, Guoan Zhang, Xingpeng Guo","doi":"10.2174/1876503301104010018","DOIUrl":"https://doi.org/10.2174/1876503301104010018","url":null,"abstract":"The electrochemical corrosion behavior of NiTi alloy electrodeposited conductive polypyrrole (PPy) coatings doped with small size sulfate (SO42  ), medium size para-toluene sulfonate (pTS  ) and large size dodecylbenzene sulfonate (DBS  ) counter anions has been studied by electrochemical measurements and surface analysis. It is demonstrated that PPy coatings inhibit the corrosion of NiTi substrate in chloride solution by shifting the corrosion potential and pitting potential positively and increasing the impedance of corrosion process. The protective performance of PPy coatings for NiTi alloy is in the order: PPy/pTS < PPy/SO4 < PPy/DBS. The protective performance of the doped PPy coatings for NiTi alloy is related to their anions exchange abilities. The worse anion exchange ability PPy coating has, the better protective performance. The increase of solution pH increases the corrosion rate of the coated NiTi substrate.","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129954426","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}
引用次数: 11
A Review of the Fatigue Behaviour of Components Coated with Thin Hard Corrosion-Resistant Coatings 薄硬耐蚀涂层构件疲劳性能研究进展
The Open Corrosion Journal Pub Date : 2011-02-24 DOI: 10.2174/1876503301104010009
S. Baragetti, F. Tordini
{"title":"A Review of the Fatigue Behaviour of Components Coated with Thin Hard Corrosion-Resistant Coatings","authors":"S. Baragetti, F. Tordini","doi":"10.2174/1876503301104010009","DOIUrl":"https://doi.org/10.2174/1876503301104010009","url":null,"abstract":"This paper provides a review of the state of the art on the study of the fatigue behaviour of mechanical components coated with thin hard corrosion-resistant coatings such as the physically or chemically vapour deposited ones. Some references address the experimental characterization of the fatigue resistance of coated steel and light alloys. Some coatings have been observed to prove effective against fatigue both in air and in aggressive environment. Numerical models and theoretical-numerical procedures have also been developed to shed light on the fatigue behaviour of coated components and to foresee the number of cycles until failure. As a matter of fact, the combination of good fatigue and anti-corrosion properties can significantly increase the performances of mechanical components operating in aggressive","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122449212","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}
引用次数: 15
Oxidation Start Detection on Heating Parts of Thermogravimetry Curves for High Temperature Alloys Based on Nickel, Cobalt or Iron 镍、钴、铁高温合金热重曲线发热部位氧化启动检测
The Open Corrosion Journal Pub Date : 2011-02-03 DOI: 10.2174/1876503301104010001
P. Berthod
{"title":"Oxidation Start Detection on Heating Parts of Thermogravimetry Curves for High Temperature Alloys Based on Nickel, Cobalt or Iron","authors":"P. Berthod","doi":"10.2174/1876503301104010001","DOIUrl":"https://doi.org/10.2174/1876503301104010001","url":null,"abstract":"The heating parts of thermogravimetry curves performed for cast alloys in air at high temperatures were analysed, after correction from the effects of air buoyancy variation, to characterize the transient oxidation before reaching the targeted temperature for the isothermal stage usually applied thereafter. This was done here for three binary M-30Cr alloys, six ternary M-30Cr-0.4 and 0.8%C alloys, and three M-30Cr-0.4C-6Ta quaternary alloys, heated in synthetic air at 20 K min-1 until 1000, 1100 or 1200°C. The cobalt alloys begin to be oxidized with a sufficient mass gain to be detected by thermogravimetry, earlier than the nickel or iron alloys (i.e. at lower temperatures). The temperature of oxidation start is lowered by the presence of tantalum for the three families of alloys. When the carbon content (or the carbides density) increases in the alloy, the temperature of oxidation start decreases for the cobalt alloys and remains almost constant for the nickel or iron alloys, while the total mass gain due to oxidation during heating increases for the nickel and cobalt alloys and decreases for the iron alloys.","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116041035","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}
引用次数: 4
Effect of Alloying Element of S, Se or Te on Oxidation Resistance of Cu at 573-873 K 合金元素S、Se、Te对Cu合金573 ~ 873 K抗氧化性能的影响
The Open Corrosion Journal Pub Date : 2010-12-15 DOI: 10.2174/1876503301003010092
Liu Guojun, Y. Zhu, K. Mimura, M. Isshiki
{"title":"Effect of Alloying Element of S, Se or Te on Oxidation Resistance of Cu at 573-873 K","authors":"Liu Guojun, Y. Zhu, K. Mimura, M. Isshiki","doi":"10.2174/1876503301003010092","DOIUrl":"https://doi.org/10.2174/1876503301003010092","url":null,"abstract":"The influence of alloying element S, Se or Te on the oxidation resistance of pure Cu was studied by oxidizing in 0.1 MPa pure oxygen atmosphere at 573-873 K in comparison with a 6N Cu (99.9999 wt.%). The addition of S, Se or Te is found to improve the oxidation resistance of Cu remarkably. This improvement is contributed from the accumulation of alloying element at the Cu2O/Cu interface and segregation of alloying elements at grain boundaries in Cu2O.","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121167257","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}
引用次数: 3
Native Air-Formed Oxide Film and its Effect on Magnesium Alloys Corrosion 天然气相氧化膜及其对镁合金腐蚀的影响
The Open Corrosion Journal Pub Date : 2010-10-13 DOI: 10.2174/1876503301003010080
S. Feliu, Juan Carlos Galván, Á. Pardo, M. Merino, R. Arrabal
{"title":"Native Air-Formed Oxide Film and its Effect on Magnesium Alloys Corrosion","authors":"S. Feliu, Juan Carlos Galván, Á. Pardo, M. Merino, R. Arrabal","doi":"10.2174/1876503301003010080","DOIUrl":"https://doi.org/10.2174/1876503301003010080","url":null,"abstract":"The present work uses X-ray photoelectron spectroscopy (XPS) analysis to compare the chemical composition of native oxide films formed spontaneously on commercial pure magnesium and AZ31, AZ80 and AZ91D magnesium alloys. The study considers both the outer surface and inner regions of the films with the assistance of argon ion bombardment. Possible relationships are established between the alloy Al content and the native oxide film characteristics. The Al content is very similar in the oxide films on all three studied alloys. XPS identifies a much greater film thickness on AZ80 and AZ91D specimens than on AZ31 and pure Mg specimens, which seems to be related with the presence ofphase (Mg17Al12) on the AZ91D alloy surface and of the eutectic � -Mg/� on the AZ80 alloy surface. Considerable Ca segregation is observed (directly related with the calcium impurities content in the bulk material) towards the outer surface of the metal, where it appears in the form of calcium oxide. Direct correspondence is found between the thickness of the native oxide film formed spontaneously on the surface of magnesium and its alloys and their subsequent corrosion resistance in exposure to a 3.5 wt% NaCl solution.","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124194286","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}
引用次数: 29
The Role of Mg2Si in the Corrosion Behavior of Al-Si-Mg Alloys for Pressureless Infiltration Mg2Si在Al-Si-Mg合金无压渗腐蚀行为中的作用
The Open Corrosion Journal Pub Date : 2010-08-17 DOI: 10.2174/1876503301003010073
R. Escalera-Lozan, M. Pech-Canul, M. Pech-Canul, M. Montoya-Dávila, A. Uribe-Salas
{"title":"The Role of Mg2Si in the Corrosion Behavior of Al-Si-Mg Alloys for Pressureless Infiltration","authors":"R. Escalera-Lozan, M. Pech-Canul, M. Pech-Canul, M. Montoya-Dávila, A. Uribe-Salas","doi":"10.2174/1876503301003010073","DOIUrl":"https://doi.org/10.2174/1876503301003010073","url":null,"abstract":"The role of Mg2Si in the electrochemical behavior of Al-Si-Mg aluminum alloys has been studied using four experimental aluminum alloys with variations in the Si/Mg molar ratio (A1-0.12, A2-0.49, A3-0.89, A4-1.05), in neutral aerated 0.1M NaCl solutions. Accordingly, the corrosion potential in open circuit (Eoc) and polarization resistance (Rp) were measured. Results show that the augment in Si/Mg molar ratio increases the presence of Mg2Si intermetallic phase. During immersion tests in neutral aerated chloride solutions the anodic activity of the Mg2Si intermetallic decreased rapidly, as indicated by a fast ennoblement of open circuit potential. After the immersion period (7 days), higher Rp values for alloys A3 and A4 (21 and 26 Kcm 2 , respectively) as compared to those for alloys A1 and A2 (5 and 10 Kcm 2 , respectively), suggest a greater corrosion resistance in Cl - containing environments for alloys A3 and A4.","PeriodicalId":420093,"journal":{"name":"The Open Corrosion Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129947145","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}
引用次数: 19
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