The role of acetylacetone in alkaline surface modification bath of electro-galvanized steel to enhance protective functioning of a hybrid silane coating

Nejad, Sepideh Akbaripoor Tafreshi; Alibakhshi, Eiman; Ramezanzadeh, Bahram; Marhamati, Fatemeh; Olivier, Marie‐Georges; Mahdavian, M.

doi:10.1016/j.porgcoat.2022.107048

Cited by 6 publications

(1 citation statement)

References 60 publications

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“…In addition, silane films are thin-layer, easily damaged, and have no self-healing properties, making it difficult to provide long time protection. To overcome the disadvantages, various methods such as adding various nanomaterials [7], corrosion inhibitors [8] , pretreatment of metal surfaces [9] were proposed. Among them, activating the metal surface by pretreatment method to give more hydroxyl groups on the surface will facilitate the adsorption of silane on the surface, thus improve the film adhesion and compactness.…”

Section: Introductionmentioning

confidence: 99%

Phytic acid pretreatment activate hot-dip galvanized steel to enhance the corrosion resistance of silane film

Le,

Zhang,

Kong

et al. 2023

Surf. Topogr.: Metrol. Prop.

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In this work, hot-dip galvanized steel were pretreated with different concentrations of phytic acid(C6H8O24P6，PA) solution to obtain more hydroxyl groups, which act as an activated site on the surface of zinc layer. Then, 3-Glycidoxypropyl methyldiethoxysilane (GPTMS) / tetraethylorthosilicate (TEOS) hybrid silane film was prepared. The structure and morphology of film were tested by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM-EDS). The results indicated that phytic acid treatment at a concentration of 5 ml/L improved the denseness and uniformity of the silane film while increasing its thickness. The results of electrochemical impedance spectroscopy (EIS) showed that the corrosion impedance of silane films under PA pretreatment was greatly improved. Furthermore, there were less rusts after 120h salt spray test.

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Section: Introductionmentioning

confidence: 99%