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Citation: Chen Xiao, Chen Shenhao,
Cai Shengmin. BREAKDOWN OF THE PASSIVE FILM ON IRON BY Cl~- IN ACIDIC SOLUTION[J]. Acta Physico-Chimica Sinica, ;1988, 4(04): 382-386. doi: 10.3866/PKU.WHXB19880411 shu

BREAKDOWN OF THE PASSIVE FILM ON IRON BY Cl~- IN ACIDIC SOLUTION

1.
Department of Chemistry; Shandong University
Department of Chemistry; Peking University

Received Date: 6 January 1987
Available Online: 15 August 1988

The coulombs of cathodic reduction can be measured when the high pure iron electrode passivated first in 0.5 mol L~(-1) H_2SO_4 for ten minutes was swept towards the cathodic direction. It is mainly due to the reduction of oxide film on the surface. A very small amount of Cl~- can obviously decrease the reduction current. The primary effect of Cl~- is its arreting the formation of passive film and reducing the stability of the passive film.
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