Zinc coatings for oxidation protection of ferrous substrates

Vourlias, G.; Pistofidis, N.; Chrissafis, K.; Stergioudis, G.

doi:10.1007/s10973-006-8280-0

Cited by 11 publications

(7 citation statements)

References 20 publications

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“…However, these techniques do not allow the comprehensive evaluation of the coating, as information is provided only from a small area. Furthermore, microscopy characterization is a time-consuming method and is hardly applicable in limited size specimens, as cross-sectional cutting, polishing and in certain cases even chemical etching preparation is required [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…This work presents the results of a detailed theoretical analysis of zinc coatings based on grazing incidence X-ray diffraction technique. The samples grown using the hot-dip galvanizing process [1][2][3][4]8,13,14,16,[18][19][20], chemical vapor deposition by pack cementation [5][6][7][8]13,14,16,[21][22][23][24][25] and wire flame thermal spray [9][10][11][12][13][14]16,[26][27][28] were examined using scanning electron microscopy (SEM), Bragg-Brentano and grazing incidence XRD, with specific interest in the composition of the thin zinc oxide layer formed on the surface. The X-rays theoretical penetration depth for all three types of sample was also calculated and compared to the experimental results.…”

Section: Introductionmentioning

confidence: 99%

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Application of X-rays Diffraction for Identifying Thin Oxide Surface Layers on Zinc Coatings

Vourlias

2020

Coatings

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Structural characterization of compound material coatings is usually achieved using time-consuming and destructive techniques such as optical and electrical microscopy, which require the use of grinding processes not always compatible with the material. This paper reports on the effective use of a theoretical model based on X-ray diffraction to calculate the thickness and composition of thin oxide films formed on the surface of zinc coatings. Zinc coatings are widely used in industrial application as protective layers against the atmospheric corrosion of steel substrates. The thickness of single- and multi-layer coatings is estimated using grazing incidence X-ray diffraction and various incidence angles. The coatings were grown using hot-dip, pack cementation and thermal spray techniques, and their experimental characteristics were compared to the theoretically predicted values of thickness and composition. The results indicate the formation of a thin zinc oxide film on top of each coating, which acts as an isolation layer and protects the surface of the sample against the environmental corrosion. Finally, the penetration depth of the X-rays into the zinc-based coatings for grazing incidence and Bragg–Brentano X-ray diffraction geometries were calculated using theoretical equations and experimentally confirmed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of X-rays Diffraction for Identifying Thin Oxide Surface Layers on Zinc Coatings

Vourlias

2020

Coatings

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“…The available information concerns only their composition and their thickness [8], while there is no data regarding the phases present in their mass, due to possible interactions between the coating and the substrate. By contrast, the corrosion of these coatings is compared with the behavior of zinc coatings deposited with other methods [9][10][11][12] and it is deduced that the corrosion mechanism depends on the coating method. Hence, the aim of the present work is to investigate the reasons for such differences and explain the corrosion behavior observed in a simulated marine environment by studying the micromorphological and microstructural characteristics of the flame-sprayed coatings.…”

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confidence: 99%

A morphological and microstructural study of flame‐sprayed zinc coatings on low‐alloyed steels as a contribution to explaining their corrosion resistance

Chaliampalias

Vourlias

Pistofidis

et al. 2008

Physica Status Solidi (a)

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Zinc is an ideal coating material for steels because it offers simultaneously cathodic and barrier protection. Several processes have been developed to provide zinc coatings. Thermal spraying is widely used due to the fact that it is simple, quick and effective. The present work deals with the morphology, the structure and the corrosion performance of zinc coatings deposited with thermal spraying. The study was performed with scanning electron microscopy and X‐ray diffraction, while microstructural characterization was accomplished with transmission electron microscopy. Finally, corrosion tests were performed with exposure of the coated samples in a salt‐spray chamber. From the microstructural investigation it was deduced that before corrosion the as‐produced coatings are mainly composed of zinc, while zinc oxide nanoparticles are dispersed in their mass. After corrosion tests it was found that zinc flame‐sprayed coatings provide adequate corrosion protection because the corrosive elements did not penetrate the coating or reach the substrate. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…One of the methods was the application of inorganic coatings [5][6][7][8] such as Alxwt.%Si (x = 0~31.9) coatings [9][10][11][12], Zinc silicate coatings [13] and zinc coatings [14,15].…”

Section: A N U S C R I P Tmentioning

confidence: 99%

“…The zinc coatings showed good resistance to the wet corrosion, but they could not be used when temperatures is higher than 400 °C. Even at low temperature, the cracks and iron oxides formed on the surface of the zinc coatings [14,18]. It is known that the 55wt.%Al-ZnSi coatings have combined the advantages of the good oxidation resistance of Al coatings and the excellent electrochemical protection of Zn coatings.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Microstructural evolution and oxidation behavior of hot-dip 55 wt.% Al–Zn–Si coated steels

Luo

Zhang

et al. 2015

Journal of Alloys and Compounds

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Zinc coatings for oxidation protection of ferrous substrates

Cited by 11 publications

References 20 publications

Application of X-rays Diffraction for Identifying Thin Oxide Surface Layers on Zinc Coatings

Application of X-rays Diffraction for Identifying Thin Oxide Surface Layers on Zinc Coatings

A morphological and microstructural study of flame‐sprayed zinc coatings on low‐alloyed steels as a contribution to explaining their corrosion resistance

Microstructural evolution and oxidation behavior of hot-dip 55 wt.% Al–Zn–Si coated steels

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