Dépouillements

Failure analysis of leakage on titanium tubes within heat exchangers in a nuclear power plant / Z.-G. Yang in Materials and corrosion, Vol. 63 N° 1 (Janvier 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 7–17 Titre : Failure analysis of leakage on titanium tubes within heat exchangers in a nuclear power plant : Part I: Electrochemical corrosion Type de document : texte imprimé Auteurs : Z.-G. Yang, Auteur ; Y. Gong, Auteur ; J.-Z. Yuan, Auteur Année de publication : 2012 Article en page(s) : pp. 7–17 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Electrochemical  corrosion  Erosion  Heat  exchanger  Hydrogen-assisted  corrosion  Seawater  Titanium  tube Résumé : Titanium tubes generally exhibit superior resistance against electrochemical corrosions amid seawater for their passive films TiO2. However, hydrogen-assisted corrosion (HAC) is actually the Achilles' heel to titanium materials when the temperature exceeds near 70 °C. In this event, severe degradations like quick thinning and leakage were frequently detected on a large number of titanium tubes exposed to natural seawater environment within heat exchangers in a nuclear power plant, which caused serious safety problems. This paper is the Part I of totally two parts conducted for the whole failure analysis study, mainly focusing on electrochemical aspect of failure causes and their behaviors. By means of over ten kinds of characterization methods, the analysis results identified that the HAC induced by the interaction effects between galvanic corrosion and crevice corrosion led to local bulges of the inner walls of some titanium tubes, and then the bulges were quickly thinned and eventually ruptured under the eddy erosion from the seawater containing sediment particles. Finally, relevant mechanisms were addressed in detail and prevention methods were proposed as well. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106189/abstract [article] Failure analysis of leakage on titanium tubes within heat exchangers in a nuclear power plant : Part I: Electrochemical corrosion [texte imprimé] / Z.-G. Yang, Auteur ; Y. Gong, Auteur ; J.-Z. Yuan, Auteur . - 2012 . - pp. 7–17. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 7–17 Mots-clés : Electrochemical  corrosion  Erosion  Heat  exchanger  Hydrogen-assisted  corrosion  Seawater  Titanium  tube Résumé : Titanium tubes generally exhibit superior resistance against electrochemical corrosions amid seawater for their passive films TiO2. However, hydrogen-assisted corrosion (HAC) is actually the Achilles' heel to titanium materials when the temperature exceeds near 70 °C. In this event, severe degradations like quick thinning and leakage were frequently detected on a large number of titanium tubes exposed to natural seawater environment within heat exchangers in a nuclear power plant, which caused serious safety problems. This paper is the Part I of totally two parts conducted for the whole failure analysis study, mainly focusing on electrochemical aspect of failure causes and their behaviors. By means of over ten kinds of characterization methods, the analysis results identified that the HAC induced by the interaction effects between galvanic corrosion and crevice corrosion led to local bulges of the inner walls of some titanium tubes, and then the bulges were quickly thinned and eventually ruptured under the eddy erosion from the seawater containing sediment particles. Finally, relevant mechanisms were addressed in detail and prevention methods were proposed as well. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106189/abstract

Failure analysis of leakage on titanium tubes within heat exchangers in a nuclear power plant / Y. Gong in Materials and corrosion, Vol. 63 N° 1 (Janvier 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 18–28 Titre : Failure analysis of leakage on titanium tubes within heat exchangers in a nuclear power plant : Part II: Mechanical degradation Type de document : texte imprimé Auteurs : Y. Gong, Auteur ; Z.-G. Yang, Auteur ; J.-Z. Yuan, Auteur Année de publication : 2012 Article en page(s) : pp. 18–28 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Clogging  Erosion  Heat  exchanger  Recirculating  cooling  water  Seawater  Titanium  tube Résumé : Serious failure incidents like clogging, quick thinning, and leakage frequently occurred on lots of titanium tubes of heat exchangers in a nuclear power plant in China. In the Part I of the whole failure analysis study with totally two parts, factors mainly involving three kinds of electrochemical corrosions were investigated, including galvanic corrosion, crevice corrosion, and hydrogen-assisted corrosion. In the current Part II, through microscopically analyzing the ruptures on the leaked tubes by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS), another four causes dominantly lying in the aspect of mechanical degradation were determined – clogging, erosion, mechanical damaging, and fretting. Among them, the erosion effect was the primary one, thus the stresses it exerted on the tube wall were also supplementarily evaluated by finite element method (FEM). Based on the analysis results, the different degradation extents and morphologies by erosion on the tubes when they were clogged by different substances such as seashell, rubber debris, and sediments were compared, and relevant mechanisms were discussed. Finally, countermeasures were put forward as well. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106190/abstract [article] Failure analysis of leakage on titanium tubes within heat exchangers in a nuclear power plant : Part II: Mechanical degradation [texte imprimé] / Y. Gong, Auteur ; Z.-G. Yang, Auteur ; J.-Z. Yuan, Auteur . - 2012 . - pp. 18–28. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 18–28 Mots-clés : Clogging  Erosion  Heat  exchanger  Recirculating  cooling  water  Seawater  Titanium  tube Résumé : Serious failure incidents like clogging, quick thinning, and leakage frequently occurred on lots of titanium tubes of heat exchangers in a nuclear power plant in China. In the Part I of the whole failure analysis study with totally two parts, factors mainly involving three kinds of electrochemical corrosions were investigated, including galvanic corrosion, crevice corrosion, and hydrogen-assisted corrosion. In the current Part II, through microscopically analyzing the ruptures on the leaked tubes by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS), another four causes dominantly lying in the aspect of mechanical degradation were determined – clogging, erosion, mechanical damaging, and fretting. Among them, the erosion effect was the primary one, thus the stresses it exerted on the tube wall were also supplementarily evaluated by finite element method (FEM). Based on the analysis results, the different degradation extents and morphologies by erosion on the tubes when they were clogged by different substances such as seashell, rubber debris, and sediments were compared, and relevant mechanisms were discussed. Finally, countermeasures were put forward as well. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106190/abstract

Corrosion of carbon steel feeders during dilute chemical decontamination of primary heat transport system of PHWRs / H. Subramanian in Materials and corrosion, Vol. 63 N° 1 (Janvier 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 29–35 Titre : Corrosion of carbon steel feeders during dilute chemical decontamination of primary heat transport system of PHWRs Type de document : texte imprimé Auteurs : H. Subramanian, Auteur ; P. Madasamy, Auteur ; V. S. Sathyaseelan, Auteur Année de publication : 2012 Article en page(s) : pp. 29–35 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Corrosion  Decontamination  Feeder Résumé : Carbon steel feeders in the primary heat transport system of pressurized heavy water reactors (PHWRs) show significant wall thinning due to flow accelerated corrosion (FAC). This is of great concern, as the wear rate in certain locations exceeds the corrosion allowance by design. This necessitates periodic measurement of wall thickness and in some cases even mid course enmasse replacement of feeders. While analyzing the data on wall thicknesses and in arriving at the wall thinning rate during operation of the reactor, sufficient care has to be taken to account for the wall thinning occurring during full system chemical decontamination campaign which is carried out occasionally to reduce dose rates during reactor shut down. Chemical decontamination of primary heat transport system is carried out using a mixture of organic acids at a total concentration of about 0.1 g/L and at 85 °C. The results of experiments carried out under simulated conditions for estimating the wall thinning occurring in carbon steel feeder elbow during dilute chemical decontamination are described in this work. The corrosion rates are quantified. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905623/abstract [article] Corrosion of carbon steel feeders during dilute chemical decontamination of primary heat transport system of PHWRs [texte imprimé] / H. Subramanian, Auteur ; P. Madasamy, Auteur ; V. S. Sathyaseelan, Auteur . - 2012 . - pp. 29–35. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 29–35 Mots-clés : Corrosion  Decontamination  Feeder Résumé : Carbon steel feeders in the primary heat transport system of pressurized heavy water reactors (PHWRs) show significant wall thinning due to flow accelerated corrosion (FAC). This is of great concern, as the wear rate in certain locations exceeds the corrosion allowance by design. This necessitates periodic measurement of wall thickness and in some cases even mid course enmasse replacement of feeders. While analyzing the data on wall thicknesses and in arriving at the wall thinning rate during operation of the reactor, sufficient care has to be taken to account for the wall thinning occurring during full system chemical decontamination campaign which is carried out occasionally to reduce dose rates during reactor shut down. Chemical decontamination of primary heat transport system is carried out using a mixture of organic acids at a total concentration of about 0.1 g/L and at 85 °C. The results of experiments carried out under simulated conditions for estimating the wall thinning occurring in carbon steel feeder elbow during dilute chemical decontamination are described in this work. The corrosion rates are quantified. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905623/abstract

Electrochemical behavior of Ni[BOND]P[BOND]SiC composite coatings / C. F. Malfatti in Materials and corrosion, Vol. 63 N° 1 (Janvier 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 36–43 Titre : Electrochemical behavior of Ni[BOND]P[BOND]SiC composite coatings : Effect of heat treatment and SiC particle incorporation Type de document : texte imprimé Auteurs : C. F. Malfatti, Auteur ; J. Z. Ferreira, Auteur ; C. T. Oliveira, Auteur Année de publication : 2012 Article en page(s) : pp. 36–43 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Composite  materials  Corrosion  Electrochemical  reactions  Ni[BOND]P[BOND]SiC Résumé : This paper describes the effects of heat treatment and of SiC particle incorporation on the electrochemical behavior and physical structure of Ni[BOND]P (17 at% P) composite coatings. The deposits were obtained by electrodeposition with various contents of SiC particles in the plating bath and heat treated at 420 °C. The physical structure was investigated by inductively coupled plasma atomic emission spectrometry (ICP-AES), X-ray diffraction (XRD), and scanning electron microscopy (SEM – image analysis). The electrochemical behavior of the resultant composite coatings was determined by chronopotentiometry, electrochemical impedance spectroscopy, and potentiodynamic measurements in 0.6 M NaCl solution at pH 6. Heat treatment showed a positive effect on the electrochemical behavior of Ni[BOND]P coatings, shifting the open circuit potential toward less active potentials. The incorporation of SiC particles inhibited pit nucleation on the Ni[BOND]P composite coating, with or without post-heat treatment. However, heat treatment in the Ni[BOND]P[BOND]SiC seemed to induce cracks in the metallic matrix, initiating at the SiC particles, possibly caused by the contraction in the metallic matrix. The cracked structure promoted localized corrosion, while coatings without heat treatment resulted in a general and uniform corrosion. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905611/abstract [article] Electrochemical behavior of Ni[BOND]P[BOND]SiC composite coatings : Effect of heat treatment and SiC particle incorporation [texte imprimé] / C. F. Malfatti, Auteur ; J. Z. Ferreira, Auteur ; C. T. Oliveira, Auteur . - 2012 . - pp. 36–43. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 36–43 Mots-clés : Composite  materials  Corrosion  Electrochemical  reactions  Ni[BOND]P[BOND]SiC Résumé : This paper describes the effects of heat treatment and of SiC particle incorporation on the electrochemical behavior and physical structure of Ni[BOND]P (17 at% P) composite coatings. The deposits were obtained by electrodeposition with various contents of SiC particles in the plating bath and heat treated at 420 °C. The physical structure was investigated by inductively coupled plasma atomic emission spectrometry (ICP-AES), X-ray diffraction (XRD), and scanning electron microscopy (SEM – image analysis). The electrochemical behavior of the resultant composite coatings was determined by chronopotentiometry, electrochemical impedance spectroscopy, and potentiodynamic measurements in 0.6 M NaCl solution at pH 6. Heat treatment showed a positive effect on the electrochemical behavior of Ni[BOND]P coatings, shifting the open circuit potential toward less active potentials. The incorporation of SiC particles inhibited pit nucleation on the Ni[BOND]P composite coating, with or without post-heat treatment. However, heat treatment in the Ni[BOND]P[BOND]SiC seemed to induce cracks in the metallic matrix, initiating at the SiC particles, possibly caused by the contraction in the metallic matrix. The cracked structure promoted localized corrosion, while coatings without heat treatment resulted in a general and uniform corrosion. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905611/abstract

Corrosion performance of epoxy coatings modified by nanoparticulate SiO2 / W. Li in Materials and corrosion, Vol. 63 N° 1 (Janvier 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 44–53 Titre : Corrosion performance of epoxy coatings modified by nanoparticulate SiO2 Type de document : texte imprimé Auteurs : W. Li, Auteur ; H. Tian, Auteur ; B. Hou, Auteur Année de publication : 2012 Article en page(s) : pp. 44–53 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Corrosion  performance  Epoxy  coating  Modification  Nanoparticulate  SiO2 Résumé : Electrochemical impedance spectroscopy (EIS) was employed to investigate the corrosion performance of nanoparticulate SiO2 modified epoxy coatings on carbon steel in 3.5 wt% NaCl solution, coupled with salt spray test. Capacitance-gravimetric methods and delamination tests were performed to analyze the water uptake behavior and interface stability against delamination of modified coatings, respectively. Four systems were studied, including a clear coating and three pigmented coatings (with 1, 2, and 3 wt% nanoparticulate SiO2). The experimental results showed that nanoparticulate SiO2 particles can improve the anti-corrosion performance of the coatings and the optimal addition content is 2 wt%. The results obtained with capacitance-gravimetric measurements showed that the diffusion process of water through epoxy coatings with different pigment volume concentration (PVC) obeyed the second Fick's diffusion law in the initial period. Adding nanoparticulate SiO2 into epoxy coatings can act effectively. The positive influence is attributed to the reaction between nanoparticles and epoxy resin which is confirmed by FTIR, improving the barrier and dispersion effectiveness of coatings. The negative one is increasing the number of pores in the coatings when the adding amount is beyond the critical PVC. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905620/abstract [article] Corrosion performance of epoxy coatings modified by nanoparticulate SiO2 [texte imprimé] / W. Li, Auteur ; H. Tian, Auteur ; B. Hou, Auteur . - 2012 . - pp. 44–53. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 44–53 Mots-clés : Corrosion  performance  Epoxy  coating  Modification  Nanoparticulate  SiO2 Résumé : Electrochemical impedance spectroscopy (EIS) was employed to investigate the corrosion performance of nanoparticulate SiO2 modified epoxy coatings on carbon steel in 3.5 wt% NaCl solution, coupled with salt spray test. Capacitance-gravimetric methods and delamination tests were performed to analyze the water uptake behavior and interface stability against delamination of modified coatings, respectively. Four systems were studied, including a clear coating and three pigmented coatings (with 1, 2, and 3 wt% nanoparticulate SiO2). The experimental results showed that nanoparticulate SiO2 particles can improve the anti-corrosion performance of the coatings and the optimal addition content is 2 wt%. The results obtained with capacitance-gravimetric measurements showed that the diffusion process of water through epoxy coatings with different pigment volume concentration (PVC) obeyed the second Fick's diffusion law in the initial period. Adding nanoparticulate SiO2 into epoxy coatings can act effectively. The positive influence is attributed to the reaction between nanoparticles and epoxy resin which is confirmed by FTIR, improving the barrier and dispersion effectiveness of coatings. The negative one is increasing the number of pores in the coatings when the adding amount is beyond the critical PVC. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905620/abstract

Relevance of the cathodic process on the passivation of stainless steels / H. Sarmiento Klapper in Materials and corrosion, Vol. 63 N° 1 (Janvier 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 54–58 Titre : Relevance of the cathodic process on the passivation of stainless steels : An approximation to the origin of the rouging phenomenon Type de document : texte imprimé Auteurs : H. Sarmiento Klapper, Auteur ; J. Göllner, Auteur ; A. Heyn, Auteur Année de publication : 2012 Article en page(s) : pp. 54–58 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Cathodic  process  Electrochemical  noise  Rouging  Stainless  steel Résumé : Unwanted corrosive phenomena on stainless steel surfaces like rouging had been observed for years occurring at certain service conditions. Rouging consists in the formation of a colored surface film containing mainly iron on metallic surfaces in contact with high-purity waters. In spite of numerous hypotheses and experimental examinations a clear explanation about the origin of rouging on stainless steels is currently still lacking. Because rouging occurs even at well passivated stainless steel surfaces the origin of this corrosive phenomenon should be related to the weakness of the stability of the passive film. In the present paper electrochemical noise measurements regarding the stability of the passive layer of alloy 904L (1.4539, X1NiCrMoCu25-20-5) in high-purity water at 70 °C depending on the cathodic process are presented. In addition, the importance of the cathodic reaction on the passivation and stability of the passive layer is discussed. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005668/abstract [article] Relevance of the cathodic process on the passivation of stainless steels : An approximation to the origin of the rouging phenomenon [texte imprimé] / H. Sarmiento Klapper, Auteur ; J. Göllner, Auteur ; A. Heyn, Auteur . - 2012 . - pp. 54–58. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 54–58 Mots-clés : Cathodic  process  Electrochemical  noise  Rouging  Stainless  steel Résumé : Unwanted corrosive phenomena on stainless steel surfaces like rouging had been observed for years occurring at certain service conditions. Rouging consists in the formation of a colored surface film containing mainly iron on metallic surfaces in contact with high-purity waters. In spite of numerous hypotheses and experimental examinations a clear explanation about the origin of rouging on stainless steels is currently still lacking. Because rouging occurs even at well passivated stainless steel surfaces the origin of this corrosive phenomenon should be related to the weakness of the stability of the passive film. In the present paper electrochemical noise measurements regarding the stability of the passive layer of alloy 904L (1.4539, X1NiCrMoCu25-20-5) in high-purity water at 70 °C depending on the cathodic process are presented. In addition, the importance of the cathodic reaction on the passivation and stability of the passive layer is discussed. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005668/abstract

Effects of alloying elements, microstructure, and inclusions on hydrogen induced cracking of X120 pipeline steel in wet H2S sour environment / F. Huang in Materials and corrosion, Vol. 63 N° 1 (Janvier 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 59–66 Titre : Effects of alloying elements, microstructure, and inclusions on hydrogen induced cracking of X120 pipeline steel in wet H2S sour environment Type de document : texte imprimé Auteurs : F. Huang, Auteur ; X. G. Li, Auteur ; J. Liu, Auteur Année de publication : 2012 Article en page(s) : pp. 59–66 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Hydrogen  induced  cracking  Inclusions  Pipeline  steel  Scanning  electron  microscopy Résumé : Hydrogen induced cracking (HIC) behavior of X120 pipeline steel with different amounts of Mn and Al was investigated using NACE standard TM0284-2005 and back-scattered electron imaging (BSE). The results demonstrated that inclusions and microstructure play significant roles in HIC susceptibility in X120 steels. The more the area and volume fraction of inclusions in the steel, the more the steel is susceptible to HIC. Three types of inclusions exist in the tested X120 steel and they play different roles in cracking. The critical size resulting in HIC cracks for pure MnS inclusions or mixed inclusions (inclusion clusters mainly composed of two or three different phases and compounds) of Mn/Al ratio >1 is smaller than that of pure Al2O3 inclusions or mixed inclusions of Mn/Al ratio <1. No HIC crack was observed at inclusions enriched in Si. The microstructure containing lath bainite and martensite/austenite (M/A) microconstituents is more susceptible to HIC than that with granular bainite and ferrite. DEWEY : 620.1 ISSN : 0947-5114 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005649/abstract [article] Effects of alloying elements, microstructure, and inclusions on hydrogen induced cracking of X120 pipeline steel in wet H2S sour environment [texte imprimé] / F. Huang, Auteur ; X. G. Li, Auteur ; J. Liu, Auteur . - 2012 . - pp. 59–66. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 59–66 Mots-clés : Hydrogen  induced  cracking  Inclusions  Pipeline  steel  Scanning  electron  microscopy Résumé : Hydrogen induced cracking (HIC) behavior of X120 pipeline steel with different amounts of Mn and Al was investigated using NACE standard TM0284-2005 and back-scattered electron imaging (BSE). The results demonstrated that inclusions and microstructure play significant roles in HIC susceptibility in X120 steels. The more the area and volume fraction of inclusions in the steel, the more the steel is susceptible to HIC. Three types of inclusions exist in the tested X120 steel and they play different roles in cracking. The critical size resulting in HIC cracks for pure MnS inclusions or mixed inclusions (inclusion clusters mainly composed of two or three different phases and compounds) of Mn/Al ratio >1 is smaller than that of pure Al2O3 inclusions or mixed inclusions of Mn/Al ratio <1. No HIC crack was observed at inclusions enriched in Si. The microstructure containing lath bainite and martensite/austenite (M/A) microconstituents is more susceptible to HIC than that with granular bainite and ferrite. DEWEY : 620.1 ISSN : 0947-5114 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005649/abstract

Influence of corrosion on the interface between zinc phosphate steel fiber and cement / M. Sun in Materials and corrosion, Vol. 63 N° 1 (Janvier 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 67–72 Titre : Influence of corrosion on the interface between zinc phosphate steel fiber and cement Type de document : texte imprimé Auteurs : M. Sun, Auteur ; D.-J. Wen, Auteur ; H.-W. Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 67–72 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Corrosion  Interface  bond  Steel  fiber  Zinc  phosphate Résumé : The interface bond between steel fibers and concrete matrix is a key factor influencing bearing capacity of steel fiber reinforced concrete (SFRC). In order to improve the interface bond strength and corrosion resistance, a kind of method was put forward by depositing zinc phosphate (ZnPh) coating on steel fiber surface in this paper. The corrosion behavior was investigated in 5% NaCl solution by using linear polarization measurement. Microstructure analysis (SEM and EDX) and fiber pull-out test in combination with linear polarization measurement were carried out. The results prove that ZnPh coatings fabricated on the carbon steel surface can not only protect steel fiber against corrosion, but also enhance the mechanical interlocking bonds between fibers and matrix. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905580/abstract [article] Influence of corrosion on the interface between zinc phosphate steel fiber and cement [texte imprimé] / M. Sun, Auteur ; D.-J. Wen, Auteur ; H.-W. Wang, Auteur . - 2012 . - pp. 67–72. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 1 (Janvier 2012) . - pp. 67–72 Mots-clés : Corrosion  Interface  bond  Steel  fiber  Zinc  phosphate Résumé : The interface bond between steel fibers and concrete matrix is a key factor influencing bearing capacity of steel fiber reinforced concrete (SFRC). In order to improve the interface bond strength and corrosion resistance, a kind of method was put forward by depositing zinc phosphate (ZnPh) coating on steel fiber surface in this paper. The corrosion behavior was investigated in 5% NaCl solution by using linear polarization measurement. Microstructure analysis (SEM and EDX) and fiber pull-out test in combination with linear polarization measurement were carried out. The results prove that ZnPh coatings fabricated on the carbon steel surface can not only protect steel fiber against corrosion, but also enhance the mechanical interlocking bonds between fibers and matrix. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905580/abstract

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