Acta Phys. -Chim. Sin. ›› 1996, Vol. 12 ›› Issue (01): 34-38.doi: 10.3866/PKU.WHXB19960108

• ARTICLE • Previous Articles     Next Articles

The Adsoption of Thiourea and tis Derivatives on Iron Electrode in Acidic Solution

Dong Jun-Hua,Song Guang-Ling,Lin Hai-Chao,Cao Chu-Nan   

  1. State Key Laboratory for Corrosion and Protection,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang 110015
  • Received:1995-03-28 Revised:1995-06-12 Published:1996-01-15
  • Contact: Dong Jun-Hua

Abstract:

The cathodic adsorption beheaviors of thiourea and 4 of its derivatives on iron in hydrochloric acid and sulphuric acid were investigated by polarization curves. The accordance of the adsorption beheavior of thiourea on iron in sulphuric acid with Temkin isotherm was deduced from hynamics, and the thiourea took part in the reaction of HER, this phenomena is a negative catalytic effect. The adsorption beheavoris of thiourea and its 4 derivatives on iron in hydrochloric acid was found to be in accord with Langmuir isotherm and this conclusion was deduced from thermodynamics, this phenomena is a blocking effect.

Key words: Thiourea, Derivatives, Iron;Adsorption, Cathodic polarization