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Corrosion of Several Typical Alloys in Concentrated Sodium Hydroxide Solution with Chloride Between 180 degrees C and 240 degrees C
Alternative TitleCorrosion
Ju, S.1,2; Zhang, Y.1,2; Shang, D.1,2; Chen, F.1,2; Wang, Y.; Zhang, Y.1,2
2011-03-01
Source PublicationCORROSION
ISSN0010-9312
Volume67Issue:3Pages:036001
AbstractThe corrosion rates of two nickel-based alloys, Alloy 400 (UNS N04400) and Alloy C-276 (UNS N10276), and two stainless steels, Type 316L (UNS 31603) and Type 304 (UNS S30400), in a concentrated sodium hydroxide (NaOH) solution (45 mass%) containing sodium chloride (NaCl, 15 g/L) between 180 degrees C to 240 degrees C were studied. Methods, such as weight variation, color changes, scanning electron microscopy (SEM), and energy spectrum analysis of the samples during tests were conducted to evaluate the corrosion of those alloy samples. Results showed that the corrosion rate of Alloy C-276 in high-alkali solution with chloride at high temperature is the lowest, about 0.022 mm/y to 0.073 mm/y, then Alloy 400, about 0.09 mm/y to 0.60 mm/y, and finally Types 304 and 316L, about 1.0 mm/y to 16.4 mm/y. Thus, the corrosion rate of Alloy C-276 is 14 to 180 times lower than that of mild steel used in the "Bayer" process. The energy spectrum analysis showed that after testing, Alloy C-276 had a very thin oxide layer. Alloy 400 can exhibit pitting corrosion when some S(2-) anions exist in the solution and forms an oxide film when concentrated Cl(-) exists in the solution. For Types 304 and 316L, cracks formed on their surface, showing that they have a high tendency to stress corrosion.; The corrosion rates of two nickel-based alloys, Alloy 400 (UNS N04400) and Alloy C-276 (UNS N10276), and two stainless steels, Type 316L (UNS 31603) and Type 304 (UNS S30400), in a concentrated sodium hydroxide (NaOH) solution (45 mass%) containing sodium chloride (NaCl, 15 g/L) between 180 degrees C to 240 degrees C were studied. Methods, such as weight variation, color changes, scanning electron microscopy (SEM), and energy spectrum analysis of the samples during tests were conducted to evaluate the corrosion of those alloy samples. Results showed that the corrosion rate of Alloy C-276 in high-alkali solution with chloride at high temperature is the lowest, about 0.022 mm/y to 0.073 mm/y, then Alloy 400, about 0.09 mm/y to 0.60 mm/y, and finally Types 304 and 316L, about 1.0 mm/y to 16.4 mm/y. Thus, the corrosion rate of Alloy C-276 is 14 to 180 times lower than that of mild steel used in the "Bayer" process. The energy spectrum analysis showed that after testing, Alloy C-276 had a very thin oxide layer. Alloy 400 can exhibit pitting corrosion when some S(2-) anions exist in the solution and forms an oxide film when concentrated Cl(-) exists in the solution. For Types 304 and 316L, cracks formed on their surface, showing that they have a high tendency to stress corrosion.
KeywordAlkalies And Salts Autoclave Testing Chloride Corrosion Rate Nickel Stainless Steel
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.5006/1.3565441
URL查看原文
Indexed BySCI
Language英语
WOS KeywordNAOH
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000294545300007
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6290
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Natl Engn Lab, Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ju, S.,Zhang, Y.,Shang, D.,et al. Corrosion of Several Typical Alloys in Concentrated Sodium Hydroxide Solution with Chloride Between 180 degrees C and 240 degrees C[J]. CORROSION,2011,67(3):036001.
APA Ju, S.,Zhang, Y.,Shang, D.,Chen, F.,Wang, Y.,&Zhang, Y..(2011).Corrosion of Several Typical Alloys in Concentrated Sodium Hydroxide Solution with Chloride Between 180 degrees C and 240 degrees C.CORROSION,67(3),036001.
MLA Ju, S.,et al."Corrosion of Several Typical Alloys in Concentrated Sodium Hydroxide Solution with Chloride Between 180 degrees C and 240 degrees C".CORROSION 67.3(2011):036001.
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