Abstract
Corrosion resistance of sensitized austenitic stainless steel (SS) in chloride environments is currently the subject of numerous studies. Most of them are focused on neutral chloride solutions at room temperature and the experiments are carried out on ground stainless steels surfaces. This paper deals with the corrosion behavior of sensitized AISI 304 stainless steel in acid 1 M chloride solution (pH = 1.1) at the temperatures of 20 ± 3 °C and 50 °C. The specimens after sensitization are tested as covered by high-temperature surface oxides (“heat tinted”), and also after their chemical removal to assess the impact of the surface state on corrosion resistance. Potentiodynamic polarization (PP) and exposure immersion test are used as the independent corrosion tests. Microstructure before/after exposure immersion test is evaluated by optical microscopy (OM) and SEM. The results obtained showed that sensitization significantly conditions corrosion regardless of the removal of high-temperature oxides, and the elevated temperature mainly acts as its accelerating factor.
Funder
Scientific Grant Agency of Ministry of Education, Science and Sport of Slovak Republic and Slovak Academy of Sciences
Project to support young researchers at UNIZA
Subject
General Materials Science
Reference41 articles.
1. Khoshnaw, F., and Gubner, R. (2020). Corrosion Atlas Case Studies. Part I: General Aspects of Corrosion, Corrosion Control, and Corrosion Prevention, Elsevier.
2. Investigation of corrosion rate of X55CrMo14 stainless steel at 65% nitrate acid at 348 K;Prod. Eng. Arch. PEA,2021
3. A review of passivity breakdown on metal surfaces: Influence of chloride- and sulfide-ion concentrations, temperature, and pH;Parangusan;Emergent Mater.,2021
4. Yoon, H., Ha, H., Lee, T., Kim, S., Jang, J., Moon, J., and Kang, N. (2019). Pitting Corrosion Resistance and Repassivation Behavior of C-Bearing Duplex Stainless Steel. Metals, 9.
5. Chloride corrosion behavior on heating pipeline made by AISI 304 and AISI 316 in reclaimed water;Chen;RSC Adv.,2021
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献