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J Chin Soc Corr Pro  1990, Vol. 10 Issue (2): 89-96    DOI:
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MECHANISM OF REANODIZING POROUS ANODIC FILMS ON ALUMINIUM IN (NH_4 )_2 M0S_4 AQUEOUS SOLUTION Ⅰ. THE EFFECT OF CHANGE OF SOLUTION ACIDITY IN PORES ON V-t TRANSIENTS DURING REANODIZING AT CONSTANT CURRENT DENSITY
Liu Haiping Xu Yuan and Zhang Wenqi (University of Science & Technology Beijing)
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Abstract  A mechanism of reanodizing porous anodic films on aluminium in(NH_4)_2MoS_4 aqueous solution at various constant current densities is proposed by analysing the voltage time transients. It is suggessted that the acidity change of the solution in pores causes the change of aggressiveness of solution to the film. The change of aggressiveness, in conjuction with the action of electric field assisted dissolution, results in the thickness variation of barrier layer in different stages of reanodizing. The V-t transients reflect the change of the barrier layer thickness. A model of ion migration in pore channels is postulated.
Received:  25 April 1990     
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Liu Haiping Xu Yuan and Zhang Wenqi (University of Science & Technology Beijing). MECHANISM OF REANODIZING POROUS ANODIC FILMS ON ALUMINIUM IN (NH_4 )_2 M0S_4 AQUEOUS SOLUTION Ⅰ. THE EFFECT OF CHANGE OF SOLUTION ACIDITY IN PORES ON V-t TRANSIENTS DURING REANODIZING AT CONSTANT CURRENT DENSITY. J Chin Soc Corr Pro, 1990, 10(2): 89-96.

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