| 水煤浆系统钨酸盐的缓蚀作用机理 |
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| 引用本文： | 贾能铀,陆柱.水煤浆系统钨酸盐的缓蚀作用机理[J].华东理工大学学报(自然科学版),1990(3). |
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| 作者姓名： | 贾能铀 陆柱 |
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| 作者单位： | 华东化工学院环境工程系
(贾能铀)，华东化工学院环境工程系(陆柱) |
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| 摘 要： | 用自行设计加速磨蚀装置,按失重法推出了金属在不同水煤浆流速下的破坏机理。在水煤浆流速低于3m/s时,腐蚀是主要的破坏形式;流速高于3m/s,磨蚀是主要的破坏形式,腐蚀与磨蚀存在交互作用。动电位扫描曲线法、Auger电子能潜、XPS扫描电子显微镜测试得知:钨酸盐缓蚀剂的作用机理可分力作用形式和作用区域两个方面。在缓蚀作用形式上钨酸盐与金属表面铁离子生成了难溶的FeWO_4(Fe_2(WO_4)_3)。在缓蚀作用区域上难溶化合物填充了金属表面原有氧化物的孔隙和缺陷,参与氧化膜一起形成了一层致密的3-D立体网状膜,从而抑制了水煤浆系统中金属的腐蚀。
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| 关 键 词： | 钨酸盐 界面 界面相 缓蚀剂 水煤浆 缓蚀机理 |
Corrosion Inhibition Mechanism of Tungstate in Coal-Water Slurry System |
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| Jia Nengyou Lu Zhu.Corrosion Inhibition Mechanism of Tungstate in Coal-Water Slurry System[J].Journal of East China University of Science and Technology,1990(3). |
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| Authors: | Jia Nengyou Lu Zhu |
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| Institution: | Department of Environmental Engineering |
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| Abstract: | The accelerating erosion cell designed is described. The mechanism of metal attack in different coal-water slurry (CWS) velocities is proposed. When CWS velocity is below 3m/s corrosion is the dominant attack mode, while over 3m/s, erosion plays a domi-nant role. The corrosion inhibition mechanism of tungstate is explained in two aspects of action pattern and action region. Tungstate ion reacts with Fe~(2+)(Fe~(3+) to form insoluble FeWO_4 on the metal surface (as Fe_2(WO_4)_3 on the outer interface). FeWO_4 fills the pores and defects of oxide on the metal surface. An uniform three-dimensional (3-D) layer is formed. |
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| Keywords: | tungstate: inhibitor interface interphase inhibition mechanism coal-water slurry |
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