International Journal of Corrosion最新文献_第8页

Inhibition Effect of Natural Pozzolan and Zinc Phosphate Baths on Reinforcing Steel Corrosion 天然火山灰浴和磷酸锌浴对钢筋腐蚀的缓蚀作用

IF 3.1

International Journal of Corrosion Pub Date : 2018-07-02 DOI: 10.1155/2018/9078253

A. Al-swaidani

{"title":"Inhibition Effect of Natural Pozzolan and Zinc Phosphate Baths on Reinforcing Steel Corrosion","authors":"A. Al-swaidani","doi":"10.1155/2018/9078253","DOIUrl":"https://doi.org/10.1155/2018/9078253","url":null,"abstract":"Zinc phosphate (ZnP) baths are widely used for increasing corrosion resistance and surface preparation for painting. Studies on exploiting these baths in the reinforced concrete (RC) are still in the early stages. This is probably due to the shortcomings, such as the alkaline instability and high porosity of the obtained coatings. Use of natural pozzolan (NP) as cement replacement is growing rapidly due to its economic, ecological, and technical benefits. The combined effect of using ZnP baths and NP-based cement on the resistance of concrete against damage caused by corrosion has been investigated. Four phosphating baths were prepared: ZnP, ZnP-Ni, ZnP-Cu, and ZnP-Mn. Steel specimens were phosphated at 55-60°C for 15 min. Concrete specimens were produced with four different levels of NP: 0% (control), 10 %, 20%, and 30%. The investigation was carried out using RC specimens where a constant anodic potential was impressed after 28 and 90 days of concrete curing. The electrochemical behavior of the coated steel has further been evaluated in chloride contaminated Ca(OH)2 saturated solution (CH-Cl) using the open circuit potential (OCP), the potentiodynamic polarization, and the polarization resistance with time. The bond strength between the coated steel and concrete has been evaluated by the pull-out test. Test results showed that concrete containing NP at higher replacement levels and steel specimens treated in bication baths exhibited corrosion initiation times several times longer than the control concrete with uncoated steel. In addition, the best corrosion performance was noted in the steel specimen treated in the ZnP-Cu bath. Its corrosion density was about twentyfold lower with respect to the bare steel, and its inhibition efficiency exceeded 95% in (CH-Cl) solution. In addition, its polarization resistance was about fifteenfold lower with respect to the bare steel. SEM, EDX, and XRD techniques have been employed, as well.","PeriodicalId":13893,"journal":{"name":"International Journal of Corrosion","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/9078253","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41379561","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: 2

Chemical Composition of Corrosion Products of Rebar Caused by Carbonation and Chloride 钢筋碳化和氯化物腐蚀产物的化学成分

IF 3.1

International Journal of Corrosion Pub Date : 2018-06-19 DOI: 10.1155/2018/7479383

Jundi Geng, Junzhe Liu, Jiali Yan, M. Ba, Z. He, Yushun Li

引用次数: 16

Effect of Rare-Earth Elements on the Corrosion Resistance of Flux-Cored Arc-Welded Metal with 10CrNi3MoV Steel 稀土元素对10CrNi3MoV钢药芯焊丝抗腐蚀性能的影响

IF 3.1

International Journal of Corrosion Pub Date : 2018-06-12 DOI: 10.1155/2018/4071352

Kai Wang, Qinghua Lu, Zexin Jiang, Y. Yi, Jianglong Yi, B. Niu, Jinjun Ma, Huiping Hu

引用次数: 3

Developing Field Test Procedures for Chloride Stress Corrosion Cracking in the Arabian Gulf 制定阿拉伯湾氯化物应力腐蚀开裂现场试验程序

IF 3.1

International Journal of Corrosion Pub Date : 2018-06-07 DOI: 10.1155/2018/6278542

H. Farhat

引用次数: 2

Tribocorrosion of Passive Materials: A Review on Test Procedures and Standards 被动材料的摩擦腐蚀：试验程序和标准综述

IF 3.1

International Journal of Corrosion Pub Date : 2018-06-07 DOI: 10.1155/2018/7345346

A. López-Ortega, J. Arana, R. Bayon

引用次数: 60

Natural Biocides for Mitigation of Sulphate Reducing Bacteria 减少硫酸盐还原菌的天然杀菌剂

IF 3.1

International Journal of Corrosion Pub Date : 2018-06-05 DOI: 10.1155/2018/3567569

W. S. Zain, N. Salleh, A. Abdullah

{"title":"Natural Biocides for Mitigation of Sulphate Reducing Bacteria","authors":"W. S. Zain, N. Salleh, A. Abdullah","doi":"10.1155/2018/3567569","DOIUrl":"https://doi.org/10.1155/2018/3567569","url":null,"abstract":"This study addresses the potential usage of various herbaceous plants extract including betel leave extract (BLE), green tea (GTE), turmeric (TE), belalai gajah (BGE), garlic extracts (GE), and manjakani extracts (ME) as future biocides of SRB that are natural and nontoxic. Study revealed that retardation of growth was obtained after addition of 5mL of natural biocides to 100 mL of the culture. Reduced biomass growth was observed with most of the tested biocides, dictated by lower biomass contents accepts for ginger and garlic. The planktonic growth was successively suppressed with addition of GTE, TE, and BGE, where the biomass production was decreased by more than 80.0% compared to the control experiments. GRE increased the growth of planktonic bacteria while the GE induced the formation of biofilms, showed by increase in biomass productions with over 23.4% and 77.46% enhancements, respectively. These results suggest that turmeric, green tea, and belalai gajah plants extracts are highly potential biocidal agents for mitigating SRB, thus controlling the effect of MIC on metal surfaces. However, the chemical stability, potential toxicity, and consistent performance of the extracts need further investigation for optimization of its use on a real field scale.","PeriodicalId":13893,"journal":{"name":"International Journal of Corrosion","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2018-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/3567569","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47473816","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: 16

Metal Matrix Composite Coatings of Cupronickel Embedded with Nanoplatelets for Improved Corrosion Resistant Properties 纳米板嵌入铜镍金属基复合涂层提高耐腐蚀性能

IF 3.1

International Journal of Corrosion Pub Date : 2018-06-03 DOI: 10.1155/2018/5250713

Casey R. Thurber, Y. H. Ahmad, M. Calhoun, Amaal Al-Shenawa, N. D'Souza, A. Mohamed, T. Golden

{"title":"Metal Matrix Composite Coatings of Cupronickel Embedded with Nanoplatelets for Improved Corrosion Resistant Properties","authors":"Casey R. Thurber, Y. H. Ahmad, M. Calhoun, Amaal Al-Shenawa, N. D'Souza, A. Mohamed, T. Golden","doi":"10.1155/2018/5250713","DOIUrl":"https://doi.org/10.1155/2018/5250713","url":null,"abstract":"The deterioration of metals under the influence of corrosion is a costly problem faced by many industries. Therefore, particle-reinforced composite coatings are being developed in different technological fields with high demands for corrosion resistance. This work studies the effects of nanoplatelet reinforcement on the durability, corrosion resistance, and mechanical properties of copper-nickel coatings. A 90 : 10 Cu-Ni alloy was coelectrodeposited with nanoplatelets of montmorillonite (Mt) embedded into the metallic matrix from electrolytic baths containing 0.05, 0.10, and 0.15% Mt. X-ray diffraction of the coatings indicated no disruption of the crystal structure with addition of the nanoplatelets into the alloy. The mechanical properties of the coatings improved with a 17% increase in hardness and an 85% increase in shear adhesion strength with nanoplatelet incorporation. The measured polarization resistance increased from 11.77 kΩ·cm2 for pure Cu-Ni to 33.28 kΩ·cm2 for the Cu-Ni-0.15% Mt coating after soaking in a simulated seawater environment for 30 days. The incorporation of montmorillonite also stabilized the corrosion potential during the immersion study and increased resistance to corrosion.","PeriodicalId":13893,"journal":{"name":"International Journal of Corrosion","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2018-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/5250713","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42138167","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: 10

The Compressive Strength and Resistivity toward Corrosion Attacks by Chloride Ion of Concrete Containing Type I Cement and Calcium Stearate 含I型水泥和硬脂酸钙混凝土的抗压强度和抗氯离子侵蚀性

IF 3.1

International Journal of Corrosion Pub Date : 2018-06-03 DOI: 10.1155/2018/2042510

A. Maryoto, B. Gan, N. I. S. Hermanto, R. Setijadi

{"title":"The Compressive Strength and Resistivity toward Corrosion Attacks by Chloride Ion of Concrete Containing Type I Cement and Calcium Stearate","authors":"A. Maryoto, B. Gan, N. I. S. Hermanto, R. Setijadi","doi":"10.1155/2018/2042510","DOIUrl":"https://doi.org/10.1155/2018/2042510","url":null,"abstract":"This study aims to determine the effect of calcium stearate on concrete. Three kinds of concrete quality are studied, namely, 20, 30, and 40 MPa. Tests performed in the laboratory comprise a compressive strength test and an infiltration test of chloride ion content. The specimens used were cylinders with a diameter of 150 mm and height of 300 mm. The chloride ion infiltration test was carried out on a cube with sides of 150 mm. The infiltration of ions into the concrete was examined at depths of 1, 2, 4, 6, and 8 cm. Four dosages of calcium stearate were added to the concrete, namely, 0, 0.25, 1.27, and 2.53% for 20 MPa concrete; 0, 0.21, 1.07, and 2.48% for 30 MPa concrete; and 0, 0.19, 0.90, and 1.87% for 40 MPa concrete. The results of compressive strength tests indicate that the amount of calcium stearate that could be safely applied to the concrete was 0.25% of the weight of cement. On the other hand, the infiltration of chloride ions at a depth of 6 cm from the unprotected concrete surface decreased by 87, 69, and 113% for the 20, 30, and 40 MPa concrete, respectively, compared to concrete without calcium stearate. The test shows that the use of calcium stearate in concrete significantly increases its resistivity against corrosion attacks because, in the absence of chloride ions, the process of corrosion does not take place in the concrete.","PeriodicalId":13893,"journal":{"name":"International Journal of Corrosion","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2018-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/2042510","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44895931","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

The Analysis of the Influence of Various Factors on the Development of Stress Corrosion Defects in the Main Gas Pipeline Walls in the Conditions of the European Part of the Russian Federation 俄联邦欧洲部分条件下各因素对天然气管道主管壁应力腐蚀缺陷发展的影响分析

IF 3.1

International Journal of Corrosion Pub Date : 2018-06-03 DOI: 10.1155/2018/1258379

A. V. Afanasyev, A. Mel’nikov, Sergey Konovalov, M. Vaskov

{"title":"The Analysis of the Influence of Various Factors on the Development of Stress Corrosion Defects in the Main Gas Pipeline Walls in the Conditions of the European Part of the Russian Federation","authors":"A. V. Afanasyev, A. Mel’nikov, Sergey Konovalov, M. Vaskov","doi":"10.1155/2018/1258379","DOIUrl":"https://doi.org/10.1155/2018/1258379","url":null,"abstract":"This paper considers the factors influencing the formation and development of stress corrosion defects detected during the inspection and overhaul of the main gas pipeline section. The surveyed gas pipeline is made of large diameter steel pipes made by controlled rolling, produced by various companies, with the predominance of pipes produced by the Khartsyzsk Pipe Plant (KhPP). The correlation between the geometric parameters of defects is described, which makes it possible to estimate the depth of cracks by external parameters. Mechanical tests by cyclic loading of samples containing cracks, based on the site operation data for the last 11 years, showed no crack growth in the absence of a corrosive medium. Micro-X-ray spectral analysis of metal and corrosion products showed no trace of the influence of hydrogen sulphide and nonmetallic inclusions (sulphides) on the development process of SCC. According to the results of the research, the process of development of stress corrosion on the main gas pipelines located in the European part of the Russian Federation is described. The organization operating the gas pipeline is recommended to take into consideration the results of this work during drawing up their repair plan.","PeriodicalId":13893,"journal":{"name":"International Journal of Corrosion","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2018-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/1258379","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43511154","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: 7

Test Conditions for Pipeline Materials Selection with High Pressure Sour Gas 高压酸性气管道选材试验条件

IF 3.1

International Journal of Corrosion Pub Date : 2018-05-29 DOI: 10.1155/2018/3402692

G. Gabetta, S. Correra, S. Sgorlon, andM. Bestetti

{"title":"Test Conditions for Pipeline Materials Selection with High Pressure Sour Gas","authors":"G. Gabetta, S. Correra, S. Sgorlon, andM. Bestetti","doi":"10.1155/2018/3402692","DOIUrl":"https://doi.org/10.1155/2018/3402692","url":null,"abstract":"Acid gases, such as CO2, H2S, and/or sulfur in oil industry’s production fluids, can be responsible for both general and localized corrosion, acting with different mechanisms, which depend on chemical and physical properties of the produced fluids. Materials selection for handling such fluids is performed by combining experience with suggestions from standards and regulations. A good deal of knowledge is available to predict corrosion rates for CO2-containing hydrocarbons, but the effect of high H2S pressure is less understood, mainly due to the difficulty of performing laboratory tests in such challenging conditions. For instance, the so-called NACE solution to assess SSC (Sulfide Stress Cracking) susceptibility of steels is a water-based solution simulating production fluids in equilibrium with one bar bubbling H2S gas. This solution does not represent environments where high gas pressure is present. Moreover, it does not take into account the corrosive properties of sulfur and its compounds that may deposit in such conditions. Besides, properties of high pressure gases are intermediate between those of a gas and those of a liquid: high pressure gases have superior wetting properties and better penetration in small pores, with respect to liquids. These features could enhance and accelerate damage, and nowadays such conditions are likely to be present in many production fields. This paper is aimed to point out a few challenges in dealing with high pressure gases and to suggest that, for materials selection in sour service, a better correspondence of test conditions with the actual field conditions shall be pursued.","PeriodicalId":13893,"journal":{"name":"International Journal of Corrosion","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2018-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/3402692","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44696376","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: 2