EVALUATION OF CHROMATE FILMS BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY

被引：10

作者：

MARIKKANNU, C

SRINIVASAN, PB

SATHIYANARAYANAN, S

BALAKRISHNAN, K

机构：

[1] Central Electrochemical Research, Inst, Karaikudi

来源：

TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING | 1995年 / 73卷

关键词：

D O I：

10.1080/00202967.1995.11871052

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Conventional chromate - fluoride baths have been employed for producing chromate films on aluminium and its alloys. In the present investigation, the effect of addition of ferricyanide to the conventional bath on the coating formation rate has been studied. The corrosion resistance of the resultant films have been evaluated by Electrochemical Impedance Spectroscopy. An attempt has also been mane to reduce the level of toxic chromates in the conventional bath. The corrosion performance of the chromate films produced from the newly formulated baths has been compared with the coatings resulting from conventional and accelerated baths.

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页码：34 / 36

页数：3

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