Corrosion resistance of stainless steels in hot acetic acid: Influence of chloride, phosphate, sulfate, and formic acid

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-07-05 DOI:10.1016/j.corsci.2025.113162

M.M. Liu , W. Emori , X.Q. Chen , X.H. Wang , Z.B. Wang , G.H. Wang , J. Yao , Z.J. Xuan , Y.G. Zheng , C.L. He

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引用次数: 0

Abstract

Driven by the concerns around corrosion failures and their associated environmental risks in acetic acid recovery distillation columns, the corrosion performances of 316 L, 2205, and AL-6XN stainless steels in 60 wt% hot acetic acid solution containing different impurities in varying concentrations (1 −10 ppm Cl⁻, 1 −100 ppm PO₄³⁻, 1 −100 ppm SO₄²⁻, and 100 −1000 ppm HCOOH) were evaluated by cyclic potentiodynamic polarization tests, galvanic corrosion measurements, long-term immersion tests and surface analysis. The results show that the critical Cl⁻ concentrations for the pitting corrosion of 316 L, 2205, and AL-6XN in hot acetic acid were 3, 5, and 9 ppm, respectively. In contrast, all three stainless steels demonstrated commendable in the presence of PO₄³⁻, SO₄²⁻, or HCOOH. The tendency for galvanic corrosion was observed in the order of 316 L > AL-6XN > 2205. Long-term immersion tests corroborated this corrosion trend, with 2205 showing the lowest overall corrosion rate (0.0013 mm/a), followed by AL-6XN (0.0099 mm/a) and 316 L (0.1541 mm/a). Furthermore, the high resistance of AL-6XN to Cl⁻-induced pitting corrosion, along with the superior overall corrosion resistance of 2205 in 60 wt% hot acetic acid, was discussed in detail.

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不锈钢在热乙酸中的耐蚀性：氯化物、磷酸盐、硫酸盐和甲酸的影响

由于对醋酸回收精馏塔腐蚀失效及其相关环境风险的关注，316 L、2205和AL-6XN不锈钢在60 wt%含不同浓度杂质（1 −10 ppm Cl−、1 −100 ppm PO43−、1 −100 ppm SO42−和100 −1000 ppm HCOOH）的热乙酸溶液中的腐蚀性能通过循环动电位极化试验、电蚀测量、长期浸泡试验和表面分析。结果表明：316 L、2205和AL-6XN在热乙酸中发生点蚀的临界Cl−浓度分别为3、5和9 ppm；相比之下，所有三种不锈钢在PO43−，SO42−或HCOOH的存在下都表现出值得称赞的性能。电偶腐蚀倾向依次为316 L >； AL-6XN >； 2205。长期浸渍试验证实了这一腐蚀趋势，2205的总腐蚀速率最低（0.0013 mm/a），其次是AL-6XN （0.0099 mm/a）和316 L （0.1541 mm/a）。此外，还详细讨论了AL-6XN对Cl−点蚀的高耐蚀性以及2205在60 wt%热乙酸中优异的整体耐蚀性。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.