Relationship between texture and corrosion resistance in hot-dip galvanized steel sheets

Seré, Pablo Ricardo; Culcasi, José Daniel; Elsner, Cecília Inês; Sarli, Alejandro Ramón Di

doi:10.1016/s0257-8972(99)00325-4

Cited by 125 publications

(83 citation statements)

References 13 publications

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“…More recently, the assessment of corrosion behaviour by EIS on industrial Zn-based coatings has been addressed on a 0.5 M sulphate medium [7] . Furthermore, the typical preferred crystal orientation of the coatings did not have any significant influence on the corrosion behaviour contrary to what is normally observed in pure zinc [8,9] . A more detailed study has been conducted by Pérez et al [10] by combining accelerated tests in a weathering cyclic chamber with EIS measurements to track the degradation steps of an uncoated galvanised steel.…”

Section: Introductioncontrasting

confidence: 57%

Comparative Study by Electrochemical Impedance Spectroscopy (EIS) On The Corrosion Resistance of Industrial and Laboratory Zinc Coatings

Hamlaoui¹,

Pedraza²,

Tifouti³

2007

American J. of Applied Sciences

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Abstract:In this work, corrosion monitoring of Zn-based coatings is investigated through potentiodynamic and electrochemical impedance spectroscopy (EIS) methods. The first part of the study is devoted to galvanised coatings conventionally manufactured in the industry. The second part focuses on the corrosion resistance of a laboratory-made electrolytic coating. For such purpose, the corrosion behaviour is studied in NaCl media under various conditions. The results show that EIS allows to establish the interfacial reactions and the dissolution mechanisms occurring in this media, hence to foresee the protection conferred by these coatings. Moreover, the salted media at different concentrations allow to unambiguously assess the coating quality in terms of porosity. However, others corrosive media can reveal the slowest reaction without having appeal to a very low frenquency scanning. Finally, Zn/NaCl interface is characterised by a specific equivalent circuit giving a similar impedance response.

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Section: Introductioncontrasting

confidence: 57%

Comparative Study by Electrochemical Impedance Spectroscopy (EIS) On The Corrosion Resistance of Industrial and Laboratory Zinc Coatings

Hamlaoui¹,

Pedraza²,

Tifouti³

2007

American J. of Applied Sciences

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“…These planes have the highest binding energy of the surface atoms; therefore, the total energy involved in both the bonds breaking and the subsequent atoms dissolution is also the highest. Consequently, such a surface becomes electrochemically less active due to the surface energy, whose value is inversely proportional to the atomic spacing, is lowest for basal planes than for others planes in hcp structure 27 . It makes that coatings having higher RIBPT components is corroded slower than those with lower RIBPT, Figure 8.…”

Section: Resultsmentioning

confidence: 99%

Effect of zinc crystals size on galvanized steel deformation and electrochemical behavior

Culcasi¹,

Elsner

Sarli

2009

Mat. Res.

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Hot-dip galvanized steel sheets with different spangle sizes were deformed by means of rolling and tension. The change of preferential crystallographic orientation and of superficial characteristics due to the deformation was analyzed by means of both X-rays diffraction and optical and scanning electronic microscopy. A correlation between such changes and the involving deformation modes was intended to be done and the spangle size influence on these modes was studied. Coating reactivity change due to the deformation was investigated by means of quasi-steady DC electrochemical tests. The results allow to infer that, in great spangle samples, the main deformation mechanism is twinning whereas in small spangle ones, pyramidal slip systems happen as well. The increase of the reactivity with the deformation is greater in tension than in rolling and it is more important in small than in great spangle samples.

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“…Changing the share of the particular additives in the zinc bath influences the crystal orientation of zinc in the coatings, and, in turn, results in differences in the properties of the coatings [20][21][22][23][24][25][26][27]. Anticorrosive properties of zinc coatings are influenced by the alloying additives, as there is a correlation between the alloying additives content and the texture of the zinc coating surface as well as the shape of its dendrites.…”

Section: Introductionmentioning

confidence: 99%

Influence of Hot-Dip Galvanised Coating Morphology on the Adhesion of Organic Coatings Depending on the Zinc Bath Pb Content and the Postgalvanising Cooling Method

Nowicka-Nowak

Zubielewicz

Kania

et al. 2018

International Journal of Corrosion

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Hot-dip galvanised coatings used either alone or with an organic coating (duplex system) constitute an effective anticorrosion protection. Adhesion between the coating and the zinc substrate plays a vital role in the durability of the duplex system. Conditions of the galvanising process and alloying additives incorporated into the zinc bath influence mechanical and protective properties as well as thickness, structure, and surface morphology of the zinc coatings. The influence of the surface morphology of zinc coatings on the adhesion of organic coatings was studied. The tests were carried out on zinc coatings produced in baths with varying Pb content and by employing various cooling methods after the galvanising process. It was noted that a rapid cooling in water produces zinc coatings with a fine-grain structure, more suitable for paint application compared to the air-cooled ones, with a spangle.

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Relationship between texture and corrosion resistance in hot-dip galvanized steel sheets

Cited by 125 publications

References 13 publications

Comparative Study by Electrochemical Impedance Spectroscopy (EIS) On The Corrosion Resistance of Industrial and Laboratory Zinc Coatings

Comparative Study by Electrochemical Impedance Spectroscopy (EIS) On The Corrosion Resistance of Industrial and Laboratory Zinc Coatings

Effect of zinc crystals size on galvanized steel deformation and electrochemical behavior

Influence of Hot-Dip Galvanised Coating Morphology on the Adhesion of Organic Coatings Depending on the Zinc Bath Pb Content and the Postgalvanising Cooling Method

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