含Ce2O3氧化物对改善双相不锈钢亚稳态点蚀的机理研究*

doi:10.11896/j.issn.1005-023X.2017.016.017

Abstract
Figure/Table
References
Related Citation (0)

Download:

Full Text ( PDF ) (3039KB)
Export: BibTeX | EndNote (RIS)

Abstract By means of scanning electron microscope (SEM), atomic force microscopy (AFM), potentiostatic pulse technique (PPT), pitting initiation mechanism of 2205 stainless steel in neutral chloride ion environment caused by oxide was studied. It was found that contact potential difference (CPD) increased sharply at MgO segregation in the MgO-Al₂O₃ inclusions and CaO enrichment zone in the MgO-CaO-Al₂O₃ inclusions. The enrichment of CaO was easy to cause the appearance of micro cracks on the surface and the exposure of matrix, which leads to galvanic corrosion. After treated by Ce, the inclusions were transformed into complex inclusions containing Ce₂O₃·11Al₂O₃ or Ce₂O₃·Al₂O₃. CPD decreased and pitting initiation phenomenon did not emerge. Finally, the pitting initiation mechanism caused by oxides inclusions and mechanism of Ce reacted with inclusion were explained.

Key words： Ce₂O₃-contained oxide metastable pitting contact potential difference potentiostatic pulse test

Published: 25 August 2017 Online: 2018-05-07

CLC number:

TF764+.1

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	PANG Zongxu
	ZHU Rong
	TU Kailu
	TANG Tianping
	ZHANG Yibo

Cite this article:

PANG Zongxu,ZHU Rong,TU Kailu, et al. Study on Mechanism of Improving Metastable Pitting of Duplex Stainless Steel by Ce₂O₃-contained Oxide[J]. Materials Reports, 2017, 31(16): 81-88.

URL:

https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.016.017 OR https://www.mater-rep.com/EN/Y2017/V31/I16/81

1 Asami K, Hashimoto K.Importance of initial surface film in the degradation of stainless steels by atmospheric exposure[J]. Corros Sci,2003,45(10):2263.
2 Olsson C O A, Landolt D.Passive films on stainless steels-chemistry, structure and growth[J]. Electrochim Acta,2003,48(9):1093.
3 Fredriksson W, Malmgren S.Full depth profile of passive films on 316L stainless steel based on high resolution HAXPES in combination with ARXPS[J].Appl Surf Sci,2012,258(15):5790.
4 Ameer M A, Fekry A M, Heakal E T.Electrochemical behaviour of passive films on molybdenum-containing austenitic stainless steels in aqueous solutions[J]. Electrochim Acta,2004,50(1):43.
5 Tobler W J, Virtanen S.Effect of Mo species on metastable pitting of Fe18Cr alloys—A current transient analysis[J]. Corros Sci,2006,48(7):1585.
6 Bastidas J M, Torres C L, Cano E, et al.Influence of molybdenum on passivation of polarised stainless steels in a chloride environment[J]. Corros Sci,2002,44(3):625.
7 Hashimoto K, Naka M, Asami K, et al.An X-ray photo-electron spectroscopy study of the passivity of amorphous Fe-Mo alloys[J]. Corros Sci,1979,19(3):165.
8 Shi L, Zheng Z J, Gao Y. Mechanism and research methods of pi-tting corrosion of stainless steels[J].Mater Rev:Rev, 2015,29(12):79(in Chinese).
石林, 郑志军, 高岩.不锈钢的点蚀机理及研究方法[J]. 材料导报:综述篇,2015,29(12):79.
9 Bao M Y, Ren C Q, Zheng Y P, et al.Adaptability evaluation of 316L stainless steel based on pitting corrosion in acid gas filed[J].Mater Rev:Rev,2016,30(9):10(in Chinese).
鲍明昱, 任呈强, 郑云萍, 等.基于点蚀的316L不锈钢在酸性气田环境中的适应性评价[J]. 材料导报:综述篇,2016,30(9):10.
10 Scully J R, Budiansky N D, Tiwary Y, et al. An alternate explanation for the abrupt current increase at the pitting potential[J]. Corros Sci,2008,50(2):316.
11 Schmuki P, Hildebrand H, et al.The composition of the boundary region of MnS inclusions in stainless steel and its relevance in triggering pitting corrosion[J]. Corros Sci,2005,47(5):1239.
12 Wijesinghe T L S L, Blackwood D J.Real time pit initiation studies on stainless steels: The effect of sulphide inclusions[J]. Corros Sci,2007,49(4):1755.
13 Newman R C.Materials science beyond the kitchen sink[J].Nature,2002,415(6873):743.
14 Lillard R S, Kashfipour M A, Niu W.Pit propagation at the boun-dary between manganese sulfide inclusions and austenitic stainless steel 303 and the role of copper[J].J Electrochem Soc,2016,163 (8):C440.
15 Ha H Y, Chan J P, Kwon H S.Effects of non-metallic inclusions on the initiation of pitting corrosion in 11% Cr ferritic stainless steel examined by micro-droplet cell[J]. Corros Sci,2007,49(3):1266.
16 Baker M A, Castle J E.The initiation of pitting corrosion of stainless steels at oxide inclusions[J]. J Cheminformatics,1992,23(39):1295.
17 Galvele J.Transport processes in passivity breakdown—Ⅱ. Full hydrolysis of the metal ions[J].Corros Sci,1981,21(8):551.
18 Kim S T, Jeon S H, Lee I S, et al.Effects of rare earth metals addition on the resistance to pitting corrosion of super duplex stainless steel—Part 1[J]. Corros Sci,2010,52(6):1897.
19 Ha H Y, Park C J, Kwon H S.Effects of misch metal on the formation of non-metallic inclusions and the associated resistance to pitting corrosion in 25% Cr duplex stainless steels[J].Scripta Mater,2006,55(11):991.
20 Hong T, Nagumo M.Effect of surface roughness on early stages of pitting corrosion of type 301 stainless steel[J]. Corros Sci,1997,39(9):1665.
21 Lacroix L, Ressier L, Blanc C, et al.Combination of AFM, SKPFM, and SIMS to study the corrosion behavior of S-phase particles in AA2024-T351[J].J Electrochem Soc,2008,155(4):C131.
22 Michaelson H B.The work function of the elements and its periodicity[J].J Appl Phys,1977,48(11):4729.
23 Li W, Li D Y.Variations of work function and corrosion behaviors of deformed copper surfaces[J]. Appl Surf Sci,2005,240(1-4):388.
24 Vignal V, Richoux V, Suzon E, et al.The use of potentiostatic pulse testing to study the corrosion behavior of welded stainless steels in sodium chloride solution[J].Mater Des,2015,88:186.
25 Naghizadeh M, Moayed M H.Investigation of the effect of solution annealing temperature on critical pitting temperature of 2205 duplex stainless steel by measuring pit solution chemistry[J]. Corros Sci,2015,94:179.
26 Gao J, Jiang Y, Deng B, et al.Determination of pitting initiation of duplex stainless steel using potentiostatic pulse technique[J]. Electrochim Acta,2010,55(17):4837.
27 Tan M W, Akiyama E, Kawashima A, et al.The effect of air exposure on the corrosion behavior of amorphous Fe-8Cr-Mo-13P-7C alloys in 1 M HCl[J]. Corros Sci,1995,37(8):1289.
28 Szummer A, Janik-Czachor M, Hofmann S.Discontinuity of the passivating film at nonmetallic inclusions in stainless steels[J].Mater Chem Phys,1993,34(2):181.
29 Batista W, Louvisse A M T, Mattos O R, et al.The electrochemical behaviour of INCOLOY 800 and AISI 304 steel in solutions that are similar to those within occluded corrosion cells[J].Corros Sci,1988,28(8):759.
30 Liu H, Zhang C.Computation of multi-component E-pH predominance diagrams[J].Calphad,2001,25(3):363.
31 Wu C, Cheng G, Long H, et al.A thermodynamic model for evaluation of mass action concentrations of Ce₂O₃-contained slag systems based on the ion and molecule coexistence theory[J].High Temp Mater Process,2013,32 (3):207.