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Titre :
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Anti-tarnish treatment of brass for coinage (II) color analysis, adsorption model, and quantum chemical calculations (2011)
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Auteurs :
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C. Liang, Auteur ;
P. Wang, Auteur ;
B. Wu, Auteur
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Type de document :
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Article : texte imprimé
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Dans :
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Materials and corrosion (Vol. 62 N° 1, Janvier 2011)
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Article en page(s) :
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pp. 53–60
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Note générale :
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Génie Mécanique
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Langues :
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Anglais
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Index. décimale :
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620.1 (Essais des matériaux. Défauts des matériaux. Protection des matériaux)
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Tags :
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adsorption model Brass EIS Quantum chemical calculation
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Résumé :
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The color and gloss of brass before and after anti-tarnish treatment were analyzed with color difference meter, and the inhibition effect of 1-phenyl-5-mercapto-tetrazole (PMTA) film on brass was investigated by means of electrochemical impedance spectroscopy (EIS). It was found that the treatment with PMTA brought few changes to the original color and gloss of brass. The adsorption of PMTA on brass surface obeyed Langmuir adsorption isotherm, it was a spontaneous and exothermic process accompanied by an increase in entropy. Further, quantum chemical calculation was applied to elucidate the corrosion inhibition mechanism of PMTA on brass surface.
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DEWEY :
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620.1
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ISSN :
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0947-5117
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En ligne :
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http://onlinelibrary.wiley.com/doi/10.1002/maco.200905482/abstract
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