Mechanistic interpretation of electrochemical behaviour of galvannealing coating in saline environment

Rout, Tapan Kumar; Bandyopadhyay, N.; Venugopalan, T.; Bhattacharjee, D.

doi:10.1016/j.corsci.2004.11.005

Cited by 25 publications

(11 citation statements)

References 12 publications

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“…During the preceding study, a current density of 0.5 mA/cm 2 was maintained. [25,26] The percentage thicknesses of the different Fe-Zn intermetallic phases were determined by superimposing the compositional ranges for the different phases obtained from the standard Fe-Zn phase diagram on the preceding QDP-GDOES profiles.…”

Section: Methodsmentioning

confidence: 99%

Structural and Textural Characterization of the Substrate and Coated Layer in an Industrial Galvannealed Interstitial-Free Steel

Chakraborty

Ray

Sangal

2008

Metall Mater Trans A

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An attempt has been made to characterize the microstructural and textural aspects of the substrate and the coated layer on industrially produced galvannealed interstitial-free (IF) steel. A number of experimental techniques were used for this purpose. The major part of the coating was found to be made up of the d layer, favorable for good formability. The texture of the substrate steel contained a sharp c component, which imparts high deep drawability. The offbasal texture {01.3} uv:w h i of the coating was also beneficial for this purpose. The favorable microstructural and textural characteristics led to satisfactory powdering resistance to the coated material.

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Section: Methodsmentioning

confidence: 99%

Structural and Textural Characterization of the Substrate and Coated Layer in an Industrial Galvannealed Interstitial-Free Steel

Chakraborty

Ray

Sangal

2008

Metall Mater Trans A

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“…Since, the lifetime of duplex coatings is highly dependent on the adhesion of the organic layer to the sacrificial layer, sand blasting on batch HDG steel, or conversion treatments on GI sheets, are usually performed before painting to remove zinc oxide and improve the adhesion of the paint. GA layers offer the utmost performance for the fabrication of duplex coatings [16,18,19]. In contrast to metallic zinc, Zn-Fe alloys can be painted with a larger range of resins and without a conversion pre-treatment, because the chemical composition and the natural small scale roughness provide excellent adhesion.…”

Section: Introductionmentioning

confidence: 99%

General vapour-phase galvanizing and duplex coatings

Petit

2019

Surface and Coatings Technology

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General vapour-phase galvanizing produces fully alloyed Fe-Zn coatings on steel by exposing complex-shaped articles to hot zinc vapours in vacuum. This way, the processing temperature can be reduced to 350°C. The growth from the gas phase generates microstructures different than other galvanizing technologies. Changing the temperature of growth produces different microstructures in coatings of similar thickness. Mechanical properties are correlated to these microstructures. The chemical properties and the natural roughness of the alloyed surface provide excellent adhesion of the organic topcoat in duplex coatings on vapour-phase galvanized steel. We have performed salt spray and Kesternich tests. The corrosion resistance of bare coatings and duplex coatings are superior to the one of commercial galvanized and galvannealed steels. The specific protocol making general vapour-phase galvanizing possible is presently named as "Epanizing".

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“…7,8) The electrolyte contained 250 mg/L NaCl and 50 mg/L ZnSO 4 . The pH of the electrolyte was kept at 4.…”

Section: Methodsmentioning

confidence: 99%

Effects of Microstructure and Texture on the Formability Character of the Coatings in Three Industrial Galvannealed Steels

Chakraborty

Ray

2008

ISIJ Int.

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The microstructural and textural aspects of the substrates and the coatings on three industrially galvannealed interstitial free, interstitial free high strength and low carbon high strength quality grade steels have been carefully evaluated to determine their effects on the powdering resistance behavior of the coatings. A high amount of delta phase and a non-basal {01.3}͗uv.w͘ texture in the coating along with low Fe content have been found beneficial in this respect.KEY WORDS: galvannealed coating; delta and interfacial layer; substrate and coating texture; powdering behavior.

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Mechanistic interpretation of electrochemical behaviour of galvannealing coating in saline environment

Cited by 25 publications

References 12 publications

Structural and Textural Characterization of the Substrate and Coated Layer in an Industrial Galvannealed Interstitial-Free Steel

Structural and Textural Characterization of the Substrate and Coated Layer in an Industrial Galvannealed Interstitial-Free Steel

General vapour-phase galvanizing and duplex coatings

Effects of Microstructure and Texture on the Formability Character of the Coatings in Three Industrial Galvannealed Steels

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