A STUDY OF ELECTROCHEMICALLY MODIFIED INHIBITIVE LAYER ON MILD STEEL

J Chin Soc Corr Pro

1989, Vol. 9

Issue (3): 199-206 DOI:

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A STUDY OF ELECTROCHEMICALLY MODIFIED INHIBITIVE LAYER ON MILD STEEL

Wen Guomou Guo Jingdong and Liu Bihuan (Fujian Institute of Research on the Structure of Matter; Academia Sinica)

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Abstract A corrosion-resistant surface is obtained on steel by a two-step anodization Process in a borate solution to which 8-hydroxyquinoline(HQ) is added in the second step. Polarization and impedance measurements have been made in an aqueous chloride medium to characterize the samples and to assess the influence of the EDA additive and chromate post-treatment. It has been shown that the resulting layer acts mainly as an interphase inhibitor of oxygen cathodic reduction. Significant improvements in corrosion resistance of posttreated samples are found especially when EDA was added to HQ containing solution for anodic treatment. It is also verified from impedance data that Rp and R_f, which are relevant to the two eapaeitive loops in the diagram, are both significant for evaluating the protective effectiveness of the inhibitve layer.

Received: 25 June 1989

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Wen Guomou Guo Jingdong and Liu Bihuan (Fujian Institute of Research on the Structure of Matter; Academia Sinica). A STUDY OF ELECTROCHEMICALLY MODIFIED INHIBITIVE LAYER ON MILD STEEL. J Chin Soc Corr Pro, 1989, 9(3): 199-206.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1989/V9/I3/199

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