Porosity and corrosion rate measurements for electroless nickel deposits on steel using electrochemical techniques

被引：33

作者：

Kerr, C ^{[1
]}

Barker, D ^{[1
]}

Walsh, F ^{[1
]}

机构：

[1] UNIV PORTSMOUTH,APPL ELECTROCHEM GRP,SCH PHARM BIOMED & PHYS SCI,PORTSMOUTH PO1 2DT,HANTS,ENGLAND

来源：

TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING | 1997年 / 75卷

关键词：

electroless plating; nickel coatings on carbon steel; porosity; corrosion resistance; corrosion testing; electrochemical tests; polarisation curves; linear polarisation resistance measurements; Tafel extrapolation; corrosion potential measurements;

D O I：

10.1080/00202967.1997.11871148

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrochemical techniques are described for the assessment of porosity in electroless nickel deposits on steel substrates from hypophosphite baths. Methods evaluated include the monitoring of the corrosion potential, determination of corrosion rate of coated samples (by a linear polarisation resistance technique, by Tafel extrapolation of polarisation plots and by the use of anodic polarisation curves) in 0.125M H2SO4 at 22 degrees C. The shapes of the porosity vs. coating thickness curves were similar for all the methods investigated and the porosity increased markedly in the case of thinner deposits.

引用

页码：81 / 87

页数：7

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