Hot dip galvanization of DP 980 steel sheet using iron based sol pre-layer and its corrosion performance

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-03-14 DOI:10.1016/j.surfcoat.2025.132042

Mahesh G. Walunj , Lokesh Ch. Pathak , Smrutiranjan Parida , V.S. Raja

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引用次数: 0

Abstract

Selective oxidation of Mn and Si alloying elements prevented hot dip galvanization of advanced high strength dual phase (DP) 980 steel. An iron pre-layer on the DP 980 steel was employed by sol-dip route from the iron based sol solution prepared using 15 wt% of Fe(NO₃)₃.9H₂O as precursor dissolved in de-ionized water and ethylene glycol solvents. The iron pre-layer in N₂–5 vol% H₂ annealing atmosphere at −30 °C dew point prevented the oxide formation under normal galvanized conditions and enabled galvanization of the steel during the hot dipping into the Zn-0.2 wt% Al molten metal bath at 460 °C. The hot dip galvanized coating with the Fe pre-layer exhibited an improved coating adhesiveness with the formation of a uniform inhibition layer at the coating-substrate interface. The coating showed fine grain size, lower surface roughness and a preferential high texture coefficient for hcp (0002) plane compared to that formed on the steel without the pre-layer. This coating showed significantly high corrosion resistance determined through salt fog, electrochemical polarization and impedance spectroscopy studies. The better corrosion resistance of the coating formed on the Fe pre-layered steel is attributed to a defect free coating, the texture and the formation of protective corrosion film formed on the zinc coating.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.