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| INFLUENCE OF ANION ON ELECTROCHEMICAL BEHAVIOR OF ALUMINUM |
| XU Gang CAO Chu-nan LIN Hai-chao(State Key Laboratory for Corrosion & Protection; Institute of Corrosion & Protection of Metals; Chinese Academy of Sciences; Shenyang 110015)ZHANG Jian-qing (Department of Chemistry; Zhejiang University; Hangzhou 310013 ) |
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Abstract The electrochemical behavior of aluminum in 0.5mol/L NaCl and 0.49mol/L NaCl+0.01mol/L NaX (X=Cl-, Br-, I-, F-, NO3-, SO42-) solutions was studied by potentiodynamic method and potentiostatic hydrogen gathering measurements. When the above-mentioned anions were added into the solution, the breakdown potential and negative difference effect (NDE) of aluminum were found to change. The breakdown potential shift resulted from the anion competitive adsorption on aluminum surface in the solution. The change of NDE could be explained by the theory of hard-soft-acid-base (HSAB). The inconsistency ofchanging trend of the breakdown potential with NDE implied that NDE of aluminum was probably caused by low valence Al+ chemical reaction in solution.
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Received: 25 June 1998
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Cite this article:
XU Gang CAO Chu-nan LIN Hai-chao(State Key Laboratory for Corrosion & Protection; Institute of Corrosion & Protection of Metals; Chinese Academy of Sciences; Shenyang 110015)ZHANG Jian-qing (Department of Chemistry; Zhejiang University; Hangzhou 310013 ). INFLUENCE OF ANION ON ELECTROCHEMICAL BEHAVIOR OF ALUMINUM. J Chin Soc Corr Pro, 1998, 18(3): 209-213.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1998/V18/I3/209
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