Corrosion failure analysis of Lightweight Tinplate in Protein Beverage

4th International Conference on Manufacturing, Material and Metallurgical Engineering

Xu, Fei-Fan^1^2 ; Shi, Yun-Guang^1 ; Yang, Jan-Wei^1 ; Yan, Song-Tao^3

Shougang Research Institute of Technology, 69 Yangzhuang Street, Shijingshan District, Beijing

100043, China^1

Beijing Key Laboratory of Green Recyclable Process for Iron AndSteel Production Technology, 69 Yangzhuang Street, Shijingshan District, Beijing

100043, China^2

National Center for Materials Service Safety, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing

100083, China^3

关键词: Beverage cans;    Corrosion failure analysis;    Corrosion mechanisms;    Corrosion product layers;    Energy dispersive x-ray;    Hydrogen evolution reactions;    Large amounts;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/538/1/012018/pdf
DOI  :  10.1088/1757-899X/538/1/012018

来源: IOP

【 摘 要 】

Electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) have been used to investigate the corrosion mechanism of lightweight tinplate in protein beverage. It is found that proteins in beverages can decomposed into hydrogen sulfide (H2S) and then hydrolyzed to H+ and S2-. Hydrogen evolution reaction between H+ and carbon steel could produce a large amount of H2, the gas assembled at the interface result in the exfoliation of corrosion product layer and accelerate the tinplate's corrosion ultimately. S2-is oxidized in the medium and generated a small fraction of S which lead to the sulfur blackening phenomenon in beverage cans.