J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (3): 561-569.DOI: 10.1016/j.jmst.2016.11.001
Special Issue: Corrosion in 2018
• Orginal Article • Previous Articles Next Articles
Xiangyu Zhong(), Xinqiang Wu(), En-Hou Han
Received:
2016-06-17
Revised:
2016-09-22
Accepted:
2016-10-14
Online:
2018-03-20
Published:
2018-03-20
Xiangyu Zhong, Xinqiang Wu, En-Hou Han. Characteristics of Oxidation and Oxygen Penetration of Alloy 690 in 600 °C Aerated Supercritical Water[J]. J. Mater. Sci. Technol., 2018, 34(3): 561-569.
C | N | Cr | Fe | Mn | P | Si | Al | Ti | Cu | Nb | Co | Ni |
---|---|---|---|---|---|---|---|---|---|---|---|---|
0.013 | 0.01 | 29.15 | 9.19 | 0.21 | 0.01 | 0.02 | 0.26 | 0.305 | 0.01 | 0.01 | 0.01 | Bal. |
Table 1 Chemical compositions of Alloy 690 (wt%)
C | N | Cr | Fe | Mn | P | Si | Al | Ti | Cu | Nb | Co | Ni |
---|---|---|---|---|---|---|---|---|---|---|---|---|
0.013 | 0.01 | 29.15 | 9.19 | 0.21 | 0.01 | 0.02 | 0.26 | 0.305 | 0.01 | 0.01 | 0.01 | Bal. |
Element | 1 (wt%) | 2 (wt%) | 3 (wt%) |
---|---|---|---|
O | 32.10 | 33 | — |
N | 5.58 | 3.28 | — |
Mg | 1.34 | 1.33 | |
Al | 2.81 | 1.88 | — |
Ti | 53.48 | 56.94 | — |
Cr | 2.28 | 1.60 | 28.51 |
Ni | 2.41 | 1.97 | 61.99 |
Fe | — | — | 9.50 |
Table 2 Chemical compositions of oxide layer (Label 1 to 3 in Fig. 2)
Element | 1 (wt%) | 2 (wt%) | 3 (wt%) |
---|---|---|---|
O | 32.10 | 33 | — |
N | 5.58 | 3.28 | — |
Mg | 1.34 | 1.33 | |
Al | 2.81 | 1.88 | — |
Ti | 53.48 | 56.94 | — |
Cr | 2.28 | 1.60 | 28.51 |
Ni | 2.41 | 1.97 | 61.99 |
Fe | — | — | 9.50 |
Fig. 6. Fig. 7(a) and Fig. 7(c) shows the cross-section images of oxide formed on Alloy 690 coupons exposed to SCW at 600 oC for 90 and 494 h, respectively, which indicate that the oxide scale is mainly composed of two layers: an outer layer that is composed of large polyhedral crystallites and a dense layer beneath the outer layer. The thickness of the oxide layer increased with an increase in exposure time, and the pores in the oxide were also increased with exposure time. The EDX line-scans across the oxide scales are shown in Fig. 7(b) and Fig. 7(d), which indicates that Ni and Fe are enriched in the outer layer and depleted in the inner layer. In contrast, Cr is enriched in the inner layer and depleted in the outer layer. The different distribution of these elements is attributed to their different affinities for oxygen and outward diffusion rates in the oxide scale.
Fig. 7. Cross-section structure and compositions of oxide films formed on Alloy 690 after exposure in 600 °C SCW for different times: (a, b) 90 h, (c, d) 494 h.
Fig. 9. (a) Raman spectra of the oxide films formed on Alloy 690 after exposure in 600 °C SCW for different times, (b) Raman spectra of the oxide films before and after ground on Alloy 690 after exposure in 600 °C SCW.
Fig. 10. SEM and optical morphologies of the cross-sections of oxide films formed on Alloy 690 after exposure in 600 °C SCW for different times: (a, c) 90 h, (b, d) 494 h.
Fig. 11. (a) EDX mapping of the distribution of O, Fe, Ni, Cr in the oxide films formed on Alloy 690 after exposure in SCW at 600 °C for 494 h. (b) The cross-section morphologies and element distribution of oxidized TiN beneath the oxide film formed on Alloy 690 after exposure in SCW at 600 °C for 494 h.
Fig. 12. (a) TEM morphology of the oxide film formed on Alloy 690 exposed in 450 °C SCW for 100 h (HAADF model), and (b) the TEM dark-field image of the oxide film. (c)-(e) SAED patterns of different zones marked in Fig. 12(b): (c) zone m, (d) zone a, (e) zone b.
|
[1] | Jun Gao, Jibo Tan, Ming Jiao, Xinqiang Wu, Lichen Tang, Yifeng Huang. Role of welding residual strain and ductility dip cracking on corrosion fatigue behavior of Alloy 52/52M dissimilar metal weld in borated and lithiated high-temperature water [J]. J. Mater. Sci. Technol., 2020, 42(0): 163-174. |
[2] | Duoduo Gao, Ranran Yuan, Jiajie Fan, Xuekun Hong, Huogen Yu. Highly efficient S2--adsorbed MoSx-modified TiO2 photocatalysts: A general grafting strategy and boosted interfacial charge transfer [J]. J. Mater. Sci. Technol., 2020, 56(0): 122-132. |
[3] | Chengxu Wang, Wei Chen, Minghui Chen, Demin Chen, Ke Yang, Fuhui Wang. Effect of TiN diffusion barrier on elements interdiffusion behavior of Ni/GH3535 system in LiF-NaF-KF molten salt at 700 ℃ [J]. J. Mater. Sci. Technol., 2020, 45(0): 125-132. |
[4] | Inime Ime Udoh, Hongwei Shi, Mohammad Soleymanibrojeni, Fuchun Liu, En-Hou Han. Inhibition of galvanic corrosion in Al/Cu coupling model by synergistic combination of 3-Amino-1,2,4-triazole-5-thiol and cerium chloride [J]. J. Mater. Sci. Technol., 2020, 44(0): 102-115. |
[5] | Yanghuan Zhang, Pengpeng Wang, Zhonghui Hou, Zeming Yuan, Yan Qi, Shihai Guo. Structure and hydrogen storage characteristics of as-spun Mg-Y-Ni-Cu alloys [J]. J. Mater. Sci. Technol., 2019, 35(8): 1727-1734. |
[6] | Yushuang Liu, Peigen Zhang, Jin Yu, Jian Chen, Yamei Zhang, Zhengming Sun. Confining effect of oxide film on tin whisker growth [J]. J. Mater. Sci. Technol., 2019, 35(8): 1735-1739. |
[7] | Igor Iatsunskyi, Margarita Baitimirova, Emerson Coy, Luis Yate, Roman Viter, Arunas Ramanavicius, Stefan Jurga, Mikhael Bechelany, Donats Erts. Influence of ZnO/graphene nanolaminate periodicity on their structural and mechanical properties [J]. J. Mater. Sci. Technol., 2018, 34(9): 1487-1493. |
[8] | Jiazhen Wang, Jianqiu Wang, Hongliang Ming, Zhiming Zhang, En-Hou Han. Effect of temperature on corrosion behavior of alloy 690 in high temperature hydrogenated water [J]. J. Mater. Sci. Technol., 2018, 34(8): 1419-1427. |
[9] | Song Yingwei, Shan Dayong, Han En-Hou. Pitting corrosion of a Rare Earth Mg alloy GW93 [J]. J. Mater. Sci. Technol., 2017, 33(9): 954-960. |
[10] | Lai Zhiwei, Xie Ruishan, Pan Chuan, Chen Xiaoguang, Liu Lei, Wang Wenxian, Zou Guisheng. Ultrasound-Assisted Transient Liquid Phase Bonding of Magnesium Alloy Using Brass Interlayer in Air [J]. J. Mater. Sci. Technol., 2017, 33(6): 567-572. |
[11] | Huang Dong, Zhang Mingyu, Huang Qizhong, Wang Liping, Tong Kai. Mechanical Property, Oxidation and Ablation Resistance of C/C-ZrB2-ZrC-SiC Composite Fabricated by Polymer Infiltration and Pyrolysis with Preform of Cf/ZrB2 [J]. J. Mater. Sci. Technol., 2017, 33(5): 481-486. |
[12] | Jiazhen Wang, Jianqiu Wang, En-Hou Han. Influence of Conductivity on Corrosion Behavior of 304 Stainless Steel in High Temperature Aqueous Environment [J]. J. Mater. Sci. Technol., 2016, 32(4): 333-340. |
[13] | Yueling Guo, En-Hou Han, Jianqiu Wang. Effects of Forging and Heat Treatments on the Microstructure and Oxidation Behavior of 316LN Stainless Steel in High Temperature Water [J]. J. Mater. Sci. Technol., 2015, 31(4): 403-412. |
[14] | Bin Zhang, Li Liu, Tianshu Li, Ying Li, Mingkai Lei, Fuhui Wang. Adsorption and Diffusion Behavior of Cl- on Sputtering Fe-20Cr Nanocrystalline Thin Film in Acid Solution (pH = 2) [J]. J. Mater. Sci. Technol., 2015, 31(12): 1198-1206. |
[15] | Jiazhen Wang, Jianqiu Wang. Influence of Ethanolamine on Corrosion of Alloy 690 in Simulated Secondary Water [J]. J. Mater. Sci. Technol., 2015, 31(10): 1039-1046. |
Viewed | ||||||
Full text |
|
|||||
Abstract |
|
|||||