钼酸盐对不锈钢孔蚀抑制作用机理的研究

中国腐蚀与防护学报

1992, Vol. 12

Issue (3): 213-220

研究报告

本期目录 | 过刊浏览

钼酸盐对不锈钢孔蚀抑制作用机理的研究

陈旭俊;王海林;陈振家

北京化工学院;北京化工学院;北京化工学院

MECHANISM OF MOLYBDATE FOR INHIBITION OF PITTING CORROSION OF STAINLESS STEEL

Chen Xujun; Wang Hailin and Chen Zhenjia (Beijing Institute of Chemical Teclunology)

全文: PDF(632 KB)

摘要: 本文采用孔蚀特征电位测试、微区电位扫描、XPS、电子探针与SEM等技术。评价了Na_2MoO_4、HEDP+ZnSO_4及其复合缓蚀剂,在中性NaCl溶液中对AISI 321不锈钢孔蚀的引发与发展过程的缓蚀作用。结果表明,Na_2MoO_4对孔蚀的引发与发展的两个阶段都有良好的抑制作用。与HEDP+ZnSO_4有明显的协同缓蚀效应。发现它的缓蚀作用与难溶的MoCl_3的生成有关,并使孔内外膜中的Cl~-含量显著增大。它提高了不稳定微蚀孔引发电位E_z。加大了孔蚀电位E_b与E_z的差值,减小了稳定蚀孔的电位峰值。

Abstract：The charcteristie pitting potential measurements, scanning micro-reference electrode technique, XPS, electron probe, SEM were used to evaluate the suppression of the initiation and propagation of pitting corrosion of AISI 321 stainless steel in neutral NaCl aqueous solution by addition of Na_2MoO_4, HEDP+ZnSO_4 and their mixture. The results showed that Na_2MoO_4 is an efficient inhibitor for both the initiation and the propagation of pitting corrosion and has marked synergic inhibition with HEDP+ZnSO_4. The inhibition of the mixture inhibitor is related to the formation of insoluble MoCl_3. It is found that Cl~- content markedly increase inside and outside pits of the film and that the initiation potential E_z of instable micro pits raises, the difference between breakthrough potential E_b and E_z increases.

收稿日期: 1992-06-25

基金资助:国家自然科学基金

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引用本文:

陈旭俊;王海林;陈振家. 钼酸盐对不锈钢孔蚀抑制作用机理的研究[J]. 中国腐蚀与防护学报, 1992, 12(3): 213-220.
. MECHANISM OF MOLYBDATE FOR INHIBITION OF PITTING CORROSION OF STAINLESS STEEL. J Chin Soc Corr Pro, 1992, 12(3): 213-220.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1992/V12/I3/213

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