Analysis of Acid Salt Spray Corrosion Process and Mechanism of Antique Cast Iron
Corrosion causes severe damage to iron-based cultural relics.Studying the corrosion process of simulated antique cast iron (as a representative of such relics) holds significant importance for revealing the corrosion mechanisms of iron artifacts.In this work, the surface morphology and corrosion pro...
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Editorial Department of Materials Protection
2025-06-01
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| Series: | Cailiao Baohu |
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| Online Access: | http://www.mat-pro.com/fileup/1001-1560/PDF/20250608.pdf |
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| author | WANG Qiang, WEI Cheng, NIU Wenjuan, QIAN Runling |
| author_facet | WANG Qiang, WEI Cheng, NIU Wenjuan, QIAN Runling |
| author_sort | WANG Qiang, WEI Cheng, NIU Wenjuan, QIAN Runling |
| collection | DOAJ |
| description | Corrosion causes severe damage to iron-based cultural relics.Studying the corrosion process of simulated antique cast iron (as a representative of such relics) holds significant importance for revealing the corrosion mechanisms of iron artifacts.In this work, the surface morphology and corrosion products of cast iron specimens after different durations of salt spray corrosion were characterized and analyzed by laser scanning confocal microscopy (LSCM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and laser Raman spectroscopy (LRS).Results showed that after 24 h of acid salt spray corrosion, corrosion pits began to form on the cast iron specimen surface.Following 72 h of exposure,microcracks developed on the surface,creating accelerated corrosion channels that led to generalized corrosion.After 192 h corrosion, the corrosion rate stabilized at a final constant rate of 1.2 g/(cm2∙h).After 240 h of corrosion, the cast iron specimen surface exhibited severe unevenness with a roughness of 8.25 μm, and the corrosion products darkened in color, with partial exfoliation of rust layers observed.With prolonged corrosion time, the O content exhibited an increasing trend, while the Fe content showed a decreasing trend.The final corrosion products were identified as α-Fe2O3, γ-FeOOH, Fe3O4 and α-FeOOH.In the acid salt spray environment, the cast iron specimen underwent surface oxidation during the initial corrosion stage.Moreover, the corrosive solution penetrated through pores to attack the substrate, generating internal stress, and cracks appeared in the surface rust layer accompanied by spallation, leading to micro-galvanic corrosion on the substrate surface. |
| format | Article |
| id | doaj-art-23a36efb3e624497a6f8a6d884a3bf25 |
| institution | DOAJ |
| issn | 1001-1560 |
| language | zho |
| publishDate | 2025-06-01 |
| publisher | Editorial Department of Materials Protection |
| record_format | Article |
| series | Cailiao Baohu |
| spelling | doaj-art-23a36efb3e624497a6f8a6d884a3bf252025-08-20T02:40:15ZzhoEditorial Department of Materials ProtectionCailiao Baohu1001-15602025-06-01586839210.16577/j.issn.1001-1560.2025.0099Analysis of Acid Salt Spray Corrosion Process and Mechanism of Antique Cast IronWANG Qiang, WEI Cheng, NIU Wenjuan, QIAN Runling0(1a.School of Metallurgical Engineering,1b.Institute for Interdisciplinary Innovation Research, Xi’an University of Architecture and Technology, Xi’an 710055, China；2.Shaanxi Research Center of Metallurgical Engineering, Xi’an 710055, China)Corrosion causes severe damage to iron-based cultural relics.Studying the corrosion process of simulated antique cast iron (as a representative of such relics) holds significant importance for revealing the corrosion mechanisms of iron artifacts.In this work, the surface morphology and corrosion products of cast iron specimens after different durations of salt spray corrosion were characterized and analyzed by laser scanning confocal microscopy (LSCM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and laser Raman spectroscopy (LRS).Results showed that after 24 h of acid salt spray corrosion, corrosion pits began to form on the cast iron specimen surface.Following 72 h of exposure,microcracks developed on the surface,creating accelerated corrosion channels that led to generalized corrosion.After 192 h corrosion, the corrosion rate stabilized at a final constant rate of 1.2 g/(cm2∙h).After 240 h of corrosion, the cast iron specimen surface exhibited severe unevenness with a roughness of 8.25 μm, and the corrosion products darkened in color, with partial exfoliation of rust layers observed.With prolonged corrosion time, the O content exhibited an increasing trend, while the Fe content showed a decreasing trend.The final corrosion products were identified as α-Fe2O3, γ-FeOOH, Fe3O4 and α-FeOOH.In the acid salt spray environment, the cast iron specimen underwent surface oxidation during the initial corrosion stage.Moreover, the corrosive solution penetrated through pores to attack the substrate, generating internal stress, and cracks appeared in the surface rust layer accompanied by spallation, leading to micro-galvanic corrosion on the substrate surface.http://www.mat-pro.com/fileup/1001-1560/PDF/20250608.pdfantique cast iron； acid salt spray； surface morphology； corrosion products； corrosion time |
| spellingShingle | WANG Qiang, WEI Cheng, NIU Wenjuan, QIAN Runling Analysis of Acid Salt Spray Corrosion Process and Mechanism of Antique Cast Iron Cailiao Baohu antique cast iron； acid salt spray； surface morphology； corrosion products； corrosion time |
| title | Analysis of Acid Salt Spray Corrosion Process and Mechanism of Antique Cast Iron |
| title_full | Analysis of Acid Salt Spray Corrosion Process and Mechanism of Antique Cast Iron |
| title_fullStr | Analysis of Acid Salt Spray Corrosion Process and Mechanism of Antique Cast Iron |
| title_full_unstemmed | Analysis of Acid Salt Spray Corrosion Process and Mechanism of Antique Cast Iron |
| title_short | Analysis of Acid Salt Spray Corrosion Process and Mechanism of Antique Cast Iron |
| title_sort | analysis of acid salt spray corrosion process and mechanism of antique cast iron |
| topic | antique cast iron； acid salt spray； surface morphology； corrosion products； corrosion time |
| url | http://www.mat-pro.com/fileup/1001-1560/PDF/20250608.pdf |
| work_keys_str_mv | AT wangqiangweichengniuwenjuanqianrunling analysisofacidsaltspraycorrosionprocessandmechanismofantiquecastiron |