OXIDATION OF TWO Co-Nb ALLOYS UNDER 1 ATM O2 AT 600℃～800℃

J Chin Soc Corr Pro

1996, Vol. 16

Issue (4): 247-255 DOI:

Current Issue | Archive | Adv Search

OXIDATION OF TWO Co-Nb ALLOYS UNDER 1 ATM O2 AT 600℃～800℃

NIU Yan; GESMUNDO F; RIZZO F C; WU Weitao (State Key Laborutory for Corrosion and Protection; Institufe of Corrosion and Protection of Metals Chineae Acodemy of Sciences)(Istituto di Chimica; Facolta'di Ingepneria; Universita'di Genova; Fiera del Mare; Pa

Download:

PDF(2937KB)
Export: BibTeX | EndNote (RIS)

Abstract The oxidation behavior of two Co-Nb alloys containing 15 and30 Wt.%Nb respectively was studied at 600-800℃ under 1 atm of pure oxygen. The oxidation kinetics followed parabolic law only approximately, whilst, especially at 600℃, the transient rate constant decreased with time. The oxidation rates of the two alloys were faster than that of pure cobalt, but the increment was rather small. The two alloys underwent both external and internal oxidation under all the conditions tested. The external scales were composed of a continuous layer of pure cobalt oxide close to the scale/gas interface, followed by an inner layer containing a complex mixture of two double Co-Nb oxides (CoNb2O6 and Co4Nb2O9) with the basemetal oxide. The region of internal oxidation contained a mixture of cobalt metal, niobium oxides (Na2O5or/and NbO2) and in the outermost region there was a double oxide formed from the Nb-rich metal phase.No niobium depletion region was observed at the alloy/scale interface. The oxidation behavior of these alloys was discussed in terms of the low solubility of niobium in cobalt and the microstructure of the alloys and the oxide scales.

Key words: Co-Nb alloys High temperature Oxidation

Received: 25 August 1996

	Service

	E-mail this article
	Add to citation manager
	E-mail Alert
	RSS
	（）
	Articles by authors

Cite this article:

URL:

https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1996/V16/I4/247

1NiuY,GesmundoF,VianiF．Corros．Sci．1994;36:4232MonteiroMJ,NiuY;fuzzoF,GesmundoF．Oxid．Met．;tobepublished3NiuY,GesmondoF,VianiF．Corros．Sci;1994,36:19734SvedbergRC．In:PropertiesofHighTemperatureAlloys,ForoulisZA,PettitFS．Eds,TheElectrochem．Soc,Princeton,NJ．1977．p．3315PhaseDiagramsforCeramistsMassalskiTBMurryJL,BennettLH,BakerH．Eds,ASM．MaterialsPerk,1986．6GesmundoF,NiuY,RizzoF,VianiF．tobepublished7LupisCHP．ChemicalThermodynamicofMaterials．North-Holland,NewYork,1983．Ch．VII8KubaschewskiO．HighTemp-HighPress,1972,4:19KofstadP．HoghTemperatureCorrosion．ElsevierAppliedSci,London,198810RappRA．Corrosion,1965,21:38211GesmundoF,NiuY,VianiF．Oxid．Met,tobepublished12GesmundoF,VianiF．Oxid．Met,1986,25:26913MorinF,RigaudM．Can．Met．Quart,1970,9:52114牛炎,GesmundoF,RizzoFC,吴继．金属学报,1996,32(3):294

[1]	REN Yan, QIAN Yuhai, ZHANG Xintao, XU Jingjun, ZUO Jun, LI Meishuan. Effect of Thermal Shock on Mechanical Properties of Siliconized Graphite with ZrB₂-SiC-La₂O₃/SiC Coating[J]. 中国腐蚀与防护学报, 2021, 41(1): 29-35.
[2]	WEI Zheng, MA Baoji, LI Long, LIU Xiaofeng, LI Hui. Effect of Ultrasonic Rolling Pretreatment on Corrosion Resistance of Micro-arc Oxidation Coating of Mg-alloy[J]. 中国腐蚀与防护学报, 2021, 41(1): 117-124.
[3]	WANG Lei, DONG Junhua, HAN Da, LIANG Jiankun, LI Quan, KE Wei. Phenonmenon of Cu Segregation in Cu-containing steel During Soaking at 1150 ℃[J]. 中国腐蚀与防护学报, 2020, 40(6): 545-552.
[4]	LIU Xiao, WANG Hai, ZHU Zhongliang, LI Ruitao, CHEN Zhenyu, FANG Xudong, XU Fanghong, ZHANG Naiqiang. Oxidation Characteristics of Austenitic Heat-resistant Steel HR3C and Sanicro25 in Supercritical Water for Power Station[J]. 中国腐蚀与防护学报, 2020, 40(6): 529-538.
[5]	XIE Dongbai, HONG Hao, WANG Wen, PENG Xiao, DUO Shuwang. Oxidation Behavior of Stainless Steel 1Cr11Ni2W2MoV in a Simulated Kerosene Combustion Environment[J]. 中国腐蚀与防护学报, 2020, 40(4): 358-366.
[6]	WANG Haiwei, CHANG Sen, LUAN Xin'gang, SONG Xuemei, WANG Zhen, LI Yanzhang, CHEN Jianli, ZHANG Jirong, HAN Ming, QIU Dangui. Preparation and Properties of Ceramics Composed of Nano-Al₂O₃ and Polysiloxane-polyborosilicate-TiB₂ Modified Polysilborazane as High Temperature Adhesive for SiC Based Ceramics[J]. 中国腐蚀与防护学报, 2020, 40(4): 367-372.
[7]	CAO Jingyi, FANG Zhigang, CHEN Jinhui, CHEN Zhixiong, YIN Wenchang, YANG Yange, ZHANG Wei. Preparation and Properties of Micro-arc Oxide Film with Single Dense Layer on Surface of 5083 Aluminum Alloy[J]. 中国腐蚀与防护学报, 2020, 40(3): 251-258.
[8]	ZHANG Zhen, WU Xinqiang, TAN Jibo. *Review of Electrochemical Noise Technique for in situ* Monitoring of Stress Corrosion Cracking**[J]. 中国腐蚀与防护学报, 2020, 40(3): 223-229.
[9]	FANG Xudong, LIU Xiao, XU Fanghong, LI Ruitao, ZHU Zhongliang, ZHANG Naiqiang. Oxidation Behavior in Supercritical Water of Domestic Austenitic Steel C-HRA-5 for Uultra-supercritical Power Stations[J]. 中国腐蚀与防护学报, 2020, 40(3): 266-272.
[10]	ZHENG Yanxin, LIU Ying, SONG Qingsong, ZHENG Feng, JIA Yuchuan, HAN Peide. High-temperature Oxidation Behavior and Wear Resistance of Copper-based Composites with Reinforcers of C, ZrSiO₄ and Fe[J]. 中国腐蚀与防护学报, 2020, 40(2): 191-198.
[11]	XU Xunhu,HE Cuiqun,XIANG Junhuai,WANG Ling,ZHANG Honghua,ZHENG Xiaodong. High Temperature Oxidation Behavior of Co-20Re-25Cr-1Si Alloy in 0.1 MPa Pure Oxygen[J]. 中国腐蚀与防护学报, 2020, 40(1): 75-80.
[12]	JIANG Dongxue,FU Ying,ZHANG Junwei,ZHANG Wei,XIN Li,ZHU Shenglong,WANG Fuhui. Preparation and Properties of Alumina Ceramic Film on Ti-alloy Surface[J]. 中国腐蚀与防护学报, 2019, 39(6): 469-476.
[13]	XIAO Jintao,CHEN Yan,XING Mingxiu,JU Pengfei,MENG Yingen,WANG Fang. Effect of Process Parameters on Corrosion Resistance of Anodizing Film on 2195 Al-Li Alloy[J]. 中国腐蚀与防护学报, 2019, 39(5): 431-438.
[14]	AI Peng,LIU Lixiang,LI Xiaogang,JIANG Wentao. Influence of TiAlSiN Coatings on High Temperature Oxidation Resistance of γ-TiAl Based Alloys[J]. 中国腐蚀与防护学报, 2019, 39(4): 306-312.
[15]	Yunhai MA. Effect of Shot Peening on Oxidation Resistance of Super 304H Steel in Supercritical Steam[J]. 中国腐蚀与防护学报, 2019, 39(3): 245-252.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Shared

Discussed