Acta Chimica Sinica ›› 2003, Vol. 61 ›› Issue (9): 1420-1424. Previous Articles     Next Articles

Original Articles

钙作为合金元素对铝在碱溶液中的缓蚀作用及其与酒石酸盐的协同效应

邵海波;王建明;张昭;张鉴清;曹楚南   

  1. 浙江大学化学系
  • 出版日期:2003-09-15 发布日期:2003-09-15

Inhibition Effect of Calcium as an Alloy Element of Aluminum and Its Cooperative Effect with Tartrate in an Alkaline Solution

Shao Haibo;Wang Jianming;Zhang Zhao;Zhang Jianqing;Cao Chunan   

  1. Department of Chemistry, Zhejiang University
  • Online:2003-09-15 Published:2003-09-15

The inhibition effect of calcium as an alloy element of aluminum and its cooperative effect with taitrate in an alkaline solution were systematically investigated by hydrogen collection, polarization curve and EIS. The experimental results show that the corrosion rate decreases with the increase of calcium content. When the electrolyte contains no tartrate, the inhibition effect of calcium on the cathodic process is much stronger than that on the anodic process. However, when the electrolyte contains tartrate (0.05 mol·L~(-1)), both the anodic and cathodic process is greatly inhibited. The analysis on the EIS reveals that the calcium ion or calcium tartrate complex ion takes its effect by reducing the reaction rates on the active sites, which indicates that they probably belong to interface inhibitor rather than interphase one.

Key words: ALUMINIUM, CALCIUM, TARTARIC ACID, CORROSION INHIBITORS, COOPERATIVITY, IMPEDANCE

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