Minghui Ouyang , Jie Pan , Faming Cai , Chundong Wang , Huan-an Liu , Xueshan Xiao
{"title":"Investigating the corrosion behaviour of Alloy 34 in a simulated waste sulfuric acid recovery environment","authors":"Minghui Ouyang , Jie Pan , Faming Cai , Chundong Wang , Huan-an Liu , Xueshan Xiao","doi":"10.1016/j.conbuildmat.2025.140813","DOIUrl":null,"url":null,"abstract":"<div><div>The corrosion behaviour of super austenitic stainless steel Alloy 34 in a simulated aggressive environment of a waste sulfuric acid recovery system has been investigated. Spontaneous passivation and depassivation of Alloy 34 are observed in 20 % H<sub>2</sub>SO<sub>4</sub> and 50 % H<sub>2</sub>SO<sub>4</sub> at 80 °C respectively. The depassivation of Alloy 34 can be attributed to the significant dissolution of the protective Cr<sub>2</sub>O<sub>3</sub> formed on the surface. The S 2p X-ray photoelectron spectra of the SO<sub>4</sub><sup>2-</sup> state indicate that these ions are present on the surface. This suggests that the chemisorption of the counter ions from sulfuric acid may contribute to the observed decrease in corrosion resistance.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"472 ","pages":"Article 140813"},"PeriodicalIF":8.0000,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061825009614","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/3/17 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The corrosion behaviour of super austenitic stainless steel Alloy 34 in a simulated aggressive environment of a waste sulfuric acid recovery system has been investigated. Spontaneous passivation and depassivation of Alloy 34 are observed in 20 % H2SO4 and 50 % H2SO4 at 80 °C respectively. The depassivation of Alloy 34 can be attributed to the significant dissolution of the protective Cr2O3 formed on the surface. The S 2p X-ray photoelectron spectra of the SO42- state indicate that these ions are present on the surface. This suggests that the chemisorption of the counter ions from sulfuric acid may contribute to the observed decrease in corrosion resistance.
期刊介绍：
Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged.
Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.
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