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Synergistic effect of different Zn salts with sodium octanoate on the corrosion inhibition of carbon steel in cooling water
Journal of Radiation Research and Applied Sciences ( IF 1.7 ) Pub Date : 2020-02-26 , DOI: 10.1080/16878507.2020.1730603
K. E. M. Mohamed 1 , O. H. Ibrahim 1 , M. E. El-Bedawy 1 , A. H. Ali 1
Affiliation  

ABSTRACT

The corrosion inhibition of carbon steel was investigated in cooling water containing sodium octanoate (Oct), Zn-salts or blends of Oct-Zn salts. The weight loss and the potentiodynamic polarization methods were applied. ZnCl2, ZnSO4 and Zn (NO3)2 were studied. The results showed that Oct-Zn salt blends exhibited higher corrosion inhibition efficiency than either Oct or Zn Salts added separately to the cooling water suggesting a synergistic interaction between Oct and the Zn-salts. The polarization results revealed that these blends act as mixed-type inhibitors with three dominant anodic inhibition. The inhibition efficiency of Zn-salts in the absence and presence of Oct was found to decrease in the order Zn (NO3)2 > ZnSO4 > ZnCl2. Optical microscopy and infrared spectroscopy were used to study the protective action of the films formed on carbon steel in Oct-Zn salt blends. The role of Zn anions and the synergism behavior were discussed.



中文翻译:

不同锌盐与辛酸钠的协同作用对冷却水中碳钢的缓蚀作用

摘要

在含有辛酸钠(Oct),锌盐或Oct-Zn盐混合物的冷却水中研究了碳钢的腐蚀抑制作用。应用了重量损失和电位动力学极化方法。研究了ZnCl 2,ZnSO 4和Zn(NO 32。结果表明,与分别添加到冷却水中的Oct或Zn盐相比,Oct-Zn盐共混物表现出更高的腐蚀抑制效率,表明Oct和Zn盐之间具有协同作用。极化结果表明,这些共混物可作为具有三种主要阳极抑制作用的混合型抑制剂。发现在不存在和存在Oct的情况下,对锌盐的抑制效率按Zn(NO 32 > ZnSO 4 > ZnCl 2。使用光学显微镜和红外光谱研究了在Oct-Zn盐混合物中碳钢上形成的膜的保护作用。讨论了锌阴离子的作用和协同行为。

更新日期:2020-04-20
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