Evaluation of Glass Coatings with Various Silica Content Corrosion in a 0.5 M HCl Water Solution

Two enamel coatings with a high and a low silica content were prepared on 35CrMo steels via vacuum firing. Their corrosion behavior in a 0.5 M HCl solution including corrosion kinetics, microstructures and electrochemistry performance were studied in comparison with uncoated steels. The results show...

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Bibliographic Details
Published in:Crystals (Basel) 2021-04, Vol.11 (4), p.346
Main Authors: Wang, Hang, Zhang, Chuan, Jiang, Chengyang, Zhu, Lijuan, Cui, Jiakai, Han, Lihong, Chen, Minghui, Geng, Shujiang, Wang, Fuhui
Format: Article
Language:English
Subjects:
acid corrosion
Acid resistance
Alkali metals
Carbon steel
Coatings
Corrosion inhibitors
Corrosion rate
Corrosion resistance
Corrosion resistant steels
Corrosion tests
Electrochemistry
Electrodes
Enamel
Ethanol
Glass coatings
Hydrochloric acid
Hydrogen chloride
Leaching
Morphology
nano crystal
Reaction kinetics
Silicon dioxide
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Summary:Two enamel coatings with a high and a low silica content were prepared on 35CrMo steels via vacuum firing. Their corrosion behavior in a 0.5 M HCl solution including corrosion kinetics, microstructures and electrochemistry performance were studied in comparison with uncoated steels. The results show that catastrophic corrosion occurred for uncoated steels while enamel coatings significantly decreased the corrosion rate. Enamel coatings with a high silica content exhibited the best corrosion resistance against hydrochloric acid due to their highly connected silicate network, which inhibited the leaching process of alkali metals in the acid solution. The corrosion inhibition efficiency for enamel containing a high silica content reached a maximum of 94.3%.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst11040346