Influence of Oxidation Pretreatment at Low Oxygen Partial Pressure on Corrosion Resistance of Nickel Base Alloy 028
摘 要
对镍基合金Alloy028 在900 ℃进行低氧分压预处理10 h, 金相观察和硬度测试结果表明, 预处理后析出物减少, 组织得到细化, 硬度明显提高。SEM、EDS及XRD分析比较试样表面微观形貌与结构特征表明, 预处理后钝化膜形成元素Cr在表面发生富集, 且部分形成由Cr2O3和NiCr2O4组成的氧化膜。极化曲线测试表明, 预处理后合金的自腐蚀电位从-0.37 V正移至-0.25 V(SCE), 腐蚀电流密度比空白试样显著降低。电化学阻抗测试表明, 预处理试样的电荷转移电阻比空白试样提高一个数量级, 膜电阻提高2倍多。
Abstract
The pretreatment of nickel base alloy 028 at low oxygen partial pressure was carried out at 900℃ for 10h. After the pretreatment, the microstructure of the nickel alloy 028 sample was refined, precipitation along with its boundaries decreased and its hardness increased. The Cr2O3 and NiCr2O4 oxide films with continuously compact structural feature were formed primarily on the sample surface. They were examined by SEM, EDS and XRD. The polarization curve of the sample after the pretreatment indicated that its corrosion potential moved from -0.25V to -0.37 V(SCE), and corrosion current density obviously reduced compared with those of the control sample. The measurements of EIS showed that the charge transfer resistance after pretreatment rose by an order of magnitude and the film resistance reached 2 times or more compared with those of the control sample.
中图分类号 TG174, TB383
所属栏目 试验研究
基金项目
收稿日期 2012/2/29
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备注陈立强, 讲师, 博士,
引用该论文: CHEN Li-qiang,Han Yu-qiong,ZHENG Shu-qi,CHEN Chang-feng. Influence of Oxidation Pretreatment at Low Oxygen Partial Pressure on Corrosion Resistance of Nickel Base Alloy 028[J]. Corrosion & Protection, 2013, 34(1): 22
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参考文献
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【4】沈琛, 张忠铧, 张春霞.高酸性腐蚀气田用BG2250-125镍基合金油管开发[J].中国工程科学, 2010, 12(10)35-38.
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【13】Pan Y M, Dunn D S, Cragnlolino G A.Grain-boundary chemistry and intergranular corrosion in alloy 825[J].Metallurgical and Materials Transactions A, 2000(4):1163-1173.
【14】陈长风, 姜瑞景, 张国安, 等.镍基合金管材高温高压H2S/CO2环境中局部腐蚀研究[J].稀有金属材料与工程, 2010, 39(3): 427-432.
【15】Young D J.High temperature oxidation and corrosion of metals[J].Science, 2008:438-439.
【16】朱日彰, 何业东, 齐慧滨.高温腐蚀及耐高温腐蚀材料[M].上海:上海科学技术出版社, 1995, 160-193.
【17】Mineaki Matsumoto.The effect of pre-oxidation atmosphere on oxidation behavior and thermal cycle life of thermal barrier coatings[J]. Materials Science and Engineering A, 2006(441): 119-125.
【18】Pan J, Leygraf C, Jargelius-Pettersso R F A.Characterization of high-temperature oxide films on stainless steels by electrochemical impedance spectroscopy[J].Oxid Met, 1998, 50(5/6):431-455.
【19】Mikkelsen L, Linderoth S.High temperature oxidation of Fe-Cr alloy in O2-H2-H2O atmospheres:Microstructure and kinetics[J].Materials Science and Engineering A, 2003, 361(1):198-212.
【20】Salgadom F, Sabionia, Huntzam Eta L.High temperature oxidation behavior of the aisi430a and aisi430e stainless steels in Ar/H2/H2O atmosphere[J].Materials research, 2008, 11(2):227-232.
【21】Horsley G, Cairns J.The inhibition of carbon deposition on stainless steel by prior selective oxidation[J].Applied Surface Sci, 1984, 18(3):273-286.
【22】邵明增, 崔立山, 郑雁军, 等.用低氧分压法在35Cr45Ni合金表面制备防结焦氧化膜[J].中国石油大学学报(自然科学版), 2010, 34(4):127-135.
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