Electrochemical noise generation during stress (corrosion cracking of high strength carbon steel in maximum entropy method.
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Description
The SCC processes of the high
strength carbon steel alloy was investigated
by the electrochemical noise
generation during corrosion processable.
The investigation was carried out under
free corrosion potential in an acidified
NoCl solution (3.5% NoCl + dil. H
2so•>.
poisoned with Na 2S (500ppm). The electrochemical noise was observed as spontaneous
fluctuations of potential. The readings
obtained were anal used using the maximum
entropy method. The spectrum standard
deviation and the roll-off slop~ ore the
Measured parameter s which appeared to
give the clearest indication of the
results. All the noise amplitudes
generally increase with decreasing
frequency a•d the power spectral density
are inversely proportional to some power
of the. frequency thus indicating '1/f'
or 'flicker• noise.
Keywords
TJ Mechanical engineering and machinery