Corrosion behavior and passive film properties of nickel-based alloy in phosphoric acid
Corrosion behavior and passive film properties of nickel-based alloy (Inconel 625) in phosphoric acid were investigated, by means of a variety of electrochemical methods combined with surface analysis techniques. Results showed that Inconel 625 exhibited strong passive behavior in phosphoric acid bu...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-03-01
|
| Series: | Corrosion Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667266923000051 |
| _version_ | 1797844267537793024 |
|---|---|
| author | Yuan Zhang Xian Zhang Siyu Chen Jing Liu Teng Li Lingyu Wang Kaiming Wu |
| author_facet | Yuan Zhang Xian Zhang Siyu Chen Jing Liu Teng Li Lingyu Wang Kaiming Wu |
| author_sort | Yuan Zhang |
| collection | DOAJ |
| description | Corrosion behavior and passive film properties of nickel-based alloy (Inconel 625) in phosphoric acid were investigated, by means of a variety of electrochemical methods combined with surface analysis techniques. Results showed that Inconel 625 exhibited strong passive behavior in phosphoric acid but their corrosion resistance was deteriorated with increasing concentration of phosphoric acid. The increasing concentration of phosphoric acid also accelerated the corrosion rate. The passive film of Inconel 625 was composed of an inner layer rich in Cr2O3 and an outer layer rich in FeOOH. The initial corrosion of Inconel 625 in phosphoric acid originated from the complex inclusions composed of N, Nb and Ti with a corn rich in Mg and O. At concentrations lower than 1 mol/L, inner layer of the passive film remained intact and only the outer layer was damaged. At concentrations of phosphoric acid higher than 1 mol/L, both the inner and outer layers were destroyed. The insoluble corrosion products Fe phosphate compounds precipitated on the surface of Inconel 625, which accumulated with increasing concentrations of phosphoric acid and became a loose layer covering the surface of Inconel 625 at concentrations of phosphoric acid higher than 1 mol/L. |
| first_indexed | 2024-04-09T17:19:31Z |
| format | Article |
| id | doaj.art-8580db1dd5684c62b93d12b7055813a9 |
| institution | Directory Open Access Journal |
| issn | 2667-2669 |
| language | English |
| last_indexed | 2024-04-09T17:19:31Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Corrosion Communications |
| spelling | doaj.art-8580db1dd5684c62b93d12b7055813a92023-04-19T04:23:34ZengElsevierCorrosion Communications2667-26692023-03-0197788Corrosion behavior and passive film properties of nickel-based alloy in phosphoric acidYuan Zhang0Xian Zhang1Siyu Chen2Jing Liu3Teng Li4Lingyu Wang5Kaiming Wu6Hubei Province Key Laboratory of Systems Science in Metallurgical Process, The State Key Laboratory of Refractories and Metallurgy, Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaHubei Province Key Laboratory of Systems Science in Metallurgical Process, The State Key Laboratory of Refractories and Metallurgy, Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, China; Corresponding authors.Hubei Province Key Laboratory of Systems Science in Metallurgical Process, The State Key Laboratory of Refractories and Metallurgy, Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaHubei Province Key Laboratory of Systems Science in Metallurgical Process, The State Key Laboratory of Refractories and Metallurgy, Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaDepartment of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China; Corresponding authors.Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, ChinaHubei Province Key Laboratory of Systems Science in Metallurgical Process, The State Key Laboratory of Refractories and Metallurgy, Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaCorrosion behavior and passive film properties of nickel-based alloy (Inconel 625) in phosphoric acid were investigated, by means of a variety of electrochemical methods combined with surface analysis techniques. Results showed that Inconel 625 exhibited strong passive behavior in phosphoric acid but their corrosion resistance was deteriorated with increasing concentration of phosphoric acid. The increasing concentration of phosphoric acid also accelerated the corrosion rate. The passive film of Inconel 625 was composed of an inner layer rich in Cr2O3 and an outer layer rich in FeOOH. The initial corrosion of Inconel 625 in phosphoric acid originated from the complex inclusions composed of N, Nb and Ti with a corn rich in Mg and O. At concentrations lower than 1 mol/L, inner layer of the passive film remained intact and only the outer layer was damaged. At concentrations of phosphoric acid higher than 1 mol/L, both the inner and outer layers were destroyed. The insoluble corrosion products Fe phosphate compounds precipitated on the surface of Inconel 625, which accumulated with increasing concentrations of phosphoric acid and became a loose layer covering the surface of Inconel 625 at concentrations of phosphoric acid higher than 1 mol/L.http://www.sciencedirect.com/science/article/pii/S2667266923000051Nickel-based alloysPhosphoric acidElectrochemical corrosionPassive film |
| spellingShingle | Yuan Zhang Xian Zhang Siyu Chen Jing Liu Teng Li Lingyu Wang Kaiming Wu Corrosion behavior and passive film properties of nickel-based alloy in phosphoric acid Corrosion Communications Nickel-based alloys Phosphoric acid Electrochemical corrosion Passive film |
| title | Corrosion behavior and passive film properties of nickel-based alloy in phosphoric acid |
| title_full | Corrosion behavior and passive film properties of nickel-based alloy in phosphoric acid |
| title_fullStr | Corrosion behavior and passive film properties of nickel-based alloy in phosphoric acid |
| title_full_unstemmed | Corrosion behavior and passive film properties of nickel-based alloy in phosphoric acid |
| title_short | Corrosion behavior and passive film properties of nickel-based alloy in phosphoric acid |
| title_sort | corrosion behavior and passive film properties of nickel based alloy in phosphoric acid |
| topic | Nickel-based alloys Phosphoric acid Electrochemical corrosion Passive film |
| url | http://www.sciencedirect.com/science/article/pii/S2667266923000051 |
| work_keys_str_mv | AT yuanzhang corrosionbehaviorandpassivefilmpropertiesofnickelbasedalloyinphosphoricacid AT xianzhang corrosionbehaviorandpassivefilmpropertiesofnickelbasedalloyinphosphoricacid AT siyuchen corrosionbehaviorandpassivefilmpropertiesofnickelbasedalloyinphosphoricacid AT jingliu corrosionbehaviorandpassivefilmpropertiesofnickelbasedalloyinphosphoricacid AT tengli corrosionbehaviorandpassivefilmpropertiesofnickelbasedalloyinphosphoricacid AT lingyuwang corrosionbehaviorandpassivefilmpropertiesofnickelbasedalloyinphosphoricacid AT kaimingwu corrosionbehaviorandpassivefilmpropertiesofnickelbasedalloyinphosphoricacid |