Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (24): 2386-2390. Previous Articles     Next Articles


木冠南, 李向红, 屈庆, 周俊   

  1. 云南大学化学系, 昆明, 650091
  • 收稿日期:2004-04-15 修回日期:2004-08-02 出版日期:2004-12-28 发布日期:2014-02-17
  • 通讯作者: 木冠南,
  • 基金资助:

Synergistic Effect on Corrosion Inhibition by Cerium(IV) Ion and Sodium Molybdate for Cold Rolled Steel in Hydrochloric Acid Solution

MU Guan-Nan, LI Xiang-Hong, QU Qing, ZHOU Jun   

  1. Department of Chemistry, Yunnan University, Kunming 650091
  • Received:2004-04-15 Revised:2004-08-02 Online:2004-12-28 Published:2014-02-17

The synergistic effect on inhibition by cerium(IV) ion and sodium molybdate for cold rolled steel (CRS) in hydrochloric acid solution was investigated by weight-loss and electrochemistry methods. The results showed that both sodium molybdate and cerium(IV) had inhibitive effect on CRS corrosion, but the maximum inhibition efficiencies were not more than 42%. From the discussion of adsorption model, the experimental results were discussed more reasonably in the light of amended formula, which was amended based on Langmuir adsorption isothermal equation. Three adsorption parameters were also calculated. Through the experiments of comparison, it was found that cerium(IV) ion with sodium molybdate produced strong synergistic effect on corrosion inhibition for CRS, and the maximum inhibition efficiency was about 90%.

Key words: hydrochloric acid, cold rolled steel, sodium molybdate, Ce4+, sodium sulfate, synergism