物理化学学报 >> 1999, Vol. 15 >> Issue (08): 726 -734 .doi: 10.3866/PKU.WHXB19990812

研究论文 上一篇    下一篇

丙炴醇聚合膜对铁在酸性溶液中的缓蚀作用

闫丽静, 何毓璠, 林海潮, 吴维弢   

  1. 中国科学院金属腐蚀预防研究所，金属腐蚀与防护国家重点实验室，沈阳 110015
  • 收稿日期:1998-10-30 修回日期:1999-01-14 发布日期:1999-08-15
  • 通讯作者: 闫丽静

Study on the Inhibition Effect of Polymer Film of Propargyl Alcohol in Fe/H2SO4 and Fe/H2SO4+H2S Systems

Yan Li-Jing, He Yu-Fan, Lin Hai-Chao, Wu Wei-Tao   

  1. Institute of Corrosion and Protection of Metals,Sate Key Laboratory for Corrosion and Protection,Chinese Academy of Sciences,Shenyang 110015
  • Received:1998-10-30 Revised:1999-01-14 Published:1999-08-15
  • Contact: Yan Li-Jing

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摘要：

应用电化学交流阻抗谱技术研究了Ｆｅ／Ｈ_２ＳＯ_４与Ｆｅ／Ｈ_２ＳＯ_４＋Ｈ_２Ｓ体系中丙炔醇（ＰＡ）聚合膜的形成及其缓蚀作用，同时利用ＳＥＭ、ＡＦＭ及ＥＤＸ对ＰＡ聚合不同时期铁表面腐蚀形貌进行观测与成分分析．结果表明，Ｆｅ／Ｈ_２ＳＯ_４与 Ｆｅ／Ｈ_２ＳＯ_４＋ Ｈ_２Ｓ体系中 ＰＡ可逐渐聚合成膜，从而有效抑制基体的腐蚀，使电极表面较为平整，微米尺度下呈现规则的块状结构；但Ｆｅ／Ｈ_２ＳＯ_４体系中宏观上ＰＡ并未形成连续的保护膜，导致电极表面局部发生腐蚀；而Ｆｅ／Ｈ_２ＳＯ_４＋Ｈ_２Ｓ体系中，Ｈ_２Ｓ、ＨＳ－在电极表面的吸附减缓了ＰＡ聚合成膜，但长时间腐蚀后，由于硫化物的生成覆盖在ＰＡ聚合膜上，使其具有长期缓蚀效能．

关键词: PA聚合物, H2S;Fe/H2SO4, 缓蚀作用

Abstract:

The formation of polymer film of propargyl alcohol(PA) and its protective ability against corrosion in Fe/H_2SO_4 and Fe/H_2SO_4+H_2S systems have been investigated using impedance measurement. The composition and morphology of the corrosion surface of iron, on which PA polymerized at different bines, were obtained with the aid of SEM and AFM as well as EDX. The results showed that PA polymerized into compact polymer film in Fe/H_2SO_4 and Fe/ H_2SO_4 + H_2S systems, which made iron surface smooth and have a morphologies of regular square structure in microscopic level. In Fe/H_2SO_4 system, macroscopic continuous polymer film of PA was not formed leading to local corrosion on electrode surface. In Fe/H_2SO_4 +H_2S system, the adsorption of H_2S and HS - on electrode surface slowed down the formation of polymer film of PA. However, the iron sulfide, produced after a longer time, increased the continuity of the polymer film of PA and therefore, the polymer film could perform its long-te...更多rm inhibition action.

Key words: Polymer film of PA;H2S, Fe/H2SO4, Inhibition effect