表面涂覆CeO_2预氧化处理对铁基合金HK40热腐蚀抗力的影响

中国腐蚀与防护学报

1991, Vol. 11

Issue (3): 233-238

研究报告

本期目录 | 过刊浏览

表面涂覆CeO_2预氧化处理对铁基合金HK40热腐蚀抗力的影响

吴维(山文);牛焱;张鉴清;沈嘉年

中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室;中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室;中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室;中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室

EFFECTS OF SURFACE-APPLIED CeO_2 ON HOT CORROSION RESISTANCE OF HK40 ALLOY

Wu Weitao Niu Yan Zhang Jianqing and Shen Jianian (Institute of Corosion and Protection of Metals; Academia Sinica)

全文: PDF(912 KB)

摘要: 用熔盐电化学方法,结合各种物相分析手段,研究了预氧化处理和表面涂覆CeO_2后预氧化处理对HK40和Cr12熔盐腐蚀过程的影响,测量经各种处理的合金在75％(NaK)_2SO_4～25％NaCl熔盐中的自腐蚀电位E_(corr)、极化阻力R_p,并计算腐蚀电流密度I_(corr)。结果表明:稀土Ce以CeO_2的形式存在于合金表面,能通过促进稳定氧化铬膜的形成,降低氧化和在熔盐中的溶解度等方式增强合金氧化膜的保护性能,提高合金的热腐蚀抗力。

Abstract：An investigation of the effect of preoxidation treatment and preoxidation with surface-applied CeO_2 on the hot corrosion behavior of HK40 alloy was electrochemically carried out in 75％ Na_2SO_4+25％NaCl melt at 800℃. The free corrosion potential (F_(corr)) and polarization resistance (R_p) were measured, and the corrosion current density (I_(corr))was calculated by polarization curve fitting technique. The results show that the surface-applied CeO_2 promotes the formation of the more adherent and protective Cr_2O_3 scale, and therefore markedly decreases the corrosion rates of the alloys and improves their hot corrosion resistance. With the aid of SEM, EPMA and XRD analysis results of the corrosion products, the observed beneficial effect of surface-applied CeO_2 was discussed.

收稿日期: 1991-06-25

基金资助:国家自然科学基金

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引用本文:

吴维(山文);牛焱;张鉴清;沈嘉年. 表面涂覆CeO_2预氧化处理对铁基合金HK40热腐蚀抗力的影响[J]. 中国腐蚀与防护学报, 1991, 11(3): 233-238.
. EFFECTS OF SURFACE-APPLIED CeO_2 ON HOT CORROSION RESISTANCE OF HK40 ALLOY. J Chin Soc Corr Pro, 1991, 11(3): 233-238.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1991/V11/I3/233

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