Skip to Main content Skip to Navigation
Journal articles

Optimization of Anticorrosive Zinc Coatings: Tuning the Adhesion of Zinc/Silica Contact by Interfacial Ternary Oxide Formation

Abstract : Formation of mixed compounds at interfaces between materials often has significant impact on the properties of the junction. With the goal of assessing if interfacial oxide mixing improves the adhesion of anti-corrosive zinc coatings on silica, we report an ab initio study of the structural, electronic, and adhesion characteristics of interfaces between zinc and zinc silicate. We show that, regardless the precise thermodynamic conditions, ZnO-rich zinc sili-cate interfaces are more stable than SiO 2-rich ones because their formation does not require breaking strong Si-O bonds. Moreover, we find that zinc adhesion at such ZnO-rich interfaces is by at least a factor two larger than that of the zinc/silica contact. Due to a dense network of interfacial Zn-O bonds, this improvement does not produce any unfavorable decohesion effects in the zinc deposit. The formation of an interfacial silicate layer enables the suppression of the weak zinc/silica interface, which is responsible for the poor zinc adhesion. The cohesive cleavage within zinc predicted for the complex zinc/silicate/silica junction offers a promising improvement of performances of anti-corrosive zinc coatings of Si-rich steel grades, of crucial importance in steel-making and automotive industries.
Complete list of metadatas

Cited literature [33 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-02875316
Contributor : Jacek Goniakowski <>
Submitted on : Friday, June 19, 2020 - 4:04:37 PM
Last modification on : Friday, June 26, 2020 - 3:20:40 AM

File

manuscript-silicate.pdf
Files produced by the author(s)

Identifiers

Citation

Jacopo Baima, Jacek Goniakowski, Claudine Noguera, Alexey Koltsov, Jean-Michel Mataigne. Optimization of Anticorrosive Zinc Coatings: Tuning the Adhesion of Zinc/Silica Contact by Interfacial Ternary Oxide Formation. Journal of Physical Chemistry C, American Chemical Society, 2020, 124 (17), pp.9337-9344. ⟨10.1021/acs.jpcc.0c00617⟩. ⟨hal-02875316⟩

Share

Metrics

Record views

31

Files downloads

50