|
|
|
| DE TERMINATIOE OF INSTANTANEOUS CORROSION RATE BY HARMONIC ANAYLSIS Ⅱ.FOURIER SERIES EXPANSION |
| Xu Naixin(Shanghai Instiute of Metallurgy; Academia Sinica)J. L. Dawson G. E. Thompson G. C. Wood(Corrosion and Protection Center; UMIST) |
|
|
|
|
Abstract As an expansion of our previous work, harmonic data manipulation with Fourier series expansion has been carried out for the simultaneous determination of instantaneous corrosion rate and Tafel slopes of corrosion system. The Fourier series coefficients are calculated by computer numerical computation. The proposed method does not imply any restriction for the amplitude of the stimulating a. c. signal. Close examination of relation between the amplitude of a. c. signal and corresponding harmonic components shows that with increasing a. e. signal, all harmonic components increase while the second and third harmonic components increase much more quickly than the first. The advantage of Fourier series expansion method over power series expansion method is that under larger a. c. signal accurate measurement of the corresponding second and third harmonic components become easy. Using an appropriate computer program which combines two subroutines for the Fourier series expansion and for the solution of simultaneous equations, three unknown parameters of corrosion system—corrosion current, anodic and cathodic Tafel slopes—are obtained from the first three harmonic current components. Experimentl verification of the theoretical considerations is shown with mild steel in 0.5N H_2SO~4.
|
|
Received: 25 June 1984
|
Cite this article:
Xu Naixin(Shanghai Instiute of Metallurgy; Academia Sinica)J. L. Dawson G. E. Thompson G. C. Wood(Corrosion and Protection Center; UMIST). DE TERMINATIOE OF INSTANTANEOUS CORROSION RATE BY HARMONIC ANAYLSIS Ⅱ.FOURIER SERIES EXPANSION. J Chin Soc Corr Pro, 1984, 4(3): 167-178.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1984/V4/I3/167
|
[1] 徐乃欣,J. L. Dawson, G. E. Thompson and G. C. Wood, 中国腐蚀与防护学报,4,159(1984)
[2] Devay. J. Meszaros, L. Acta Chimica Academiae Scientiarum Hungaricae, 100, 183(1979)
[3] Hamming, R. W. Numerical Methods for Scientists and Engineers, McGraw-Hill, 67～80(1962)
[4] Forman S. Acton. Numerical Methods that work. Harper and Row, 221～257(1970)
[5] HP-85 Math Pac, Hewlett-Packard Company, 32～35(1979) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
