Potential Noises of Carbon Steel in Deaerated Chloride Solutions Containing Sodium Nitrite

Yoneda, Yutaka; Inoue, Hiroyuki

doi:10.3323/jcorr1991.52.496

Cited by 5 publications

(3 citation statements)

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“…Recently, an electrochemical noise analysis technique has been applied in a number of corroding environments [18][19][20][21][22][23] . Bertocci et al 18,19) has reported a electrochemical noise technique employing a corrosion couple and FFT (First Fourier Transformation).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Noise Analysis of Galvanic Corrosion of Anodized Aluminum in Chloride Environments

2006

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A new type of electrochemical noise analysis technique with First Fourier Transformation, FFT, was applied to galvanic corrosion of barrier and porous type anodic oxide films formed on aluminum in 0.5 kmol/m 3 H 3 BO 4 / 0.05 kmol/m 3 Na 2 B 4 O 7 solutions with 0.01 kmol/m 3 NaCl. During localized corrosion, the current and potential were changed, with fluctuations and the potential and the current fluctuations show good correlation. The slope of the PSD spectra of both types of anodized specimens are about minus one (-1), just after localized corrosion started. This technique allows observation of electrochemical impedance changes during localized corrosion. The impedance spectra are independent of signal frequency and the impedance of porous types anodic oxide film specimens decrease with immersion time and increases with anodizing time.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Noise Analysis of Galvanic Corrosion of Anodized Aluminum in Chloride Environments

2006

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“…It is, however, not clear how the extent of the anodizing surface treatment influences on the galvanic corrosion of aluminum and its alloys. environments [13][14][15][16][17][18][19] . The purpose of this study is to examine effect of anodic oxide film structure on galvanic corrosion of anodized aluminum alloy in chloride containing solutions by using electrochemical noise analysis technique.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Noise Study on Galvanic Corrosion of Aluminum Alloy in Chloride Environments- Effect of Oxide Film Structure

2006

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Four different types of anodic films, barrier type, porous type anodized in (COOH) 2 solution, porous type anodized in H 2 SO 4 solution and composite type, were formed on pure aluminum and aluminum alloy specimens. The effect of anodic oxide film structure on galvanic corrosion of aluminum and its alloys was measured by electrochemical noise technique. During incubation period (before localized corrosion started), both current and potential slightly changed with time. After localized corrosion started, those changed suddenly with time with fluctuation. The composite type anodic oxide film formed on pure aluminum and 6061 alloys showed the longest incubation period than other types of anodic oxide films formed on these specimens. However, anodic oxide treatment did not increase corrosion resistance of 2017 alloy.

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“…The electrochemical noise analysis technique have been carried out several corroding environments [1][2][3][4][5][6][7] in recentlly.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Noise Study on Galvanic Corrosion of Aluminum Alloy in Chloride Environments- Effect of Oxide Film Structure

Sakairi,

Shimoyama,

Takahashi

2006

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Potential Noises of Carbon Steel in Deaerated Chloride Solutions Containing Sodium Nitrite

Cited by 5 publications

References 0 publications

Electrochemical Noise Analysis of Galvanic Corrosion of Anodized Aluminum in Chloride Environments

Electrochemical Noise Analysis of Galvanic Corrosion of Anodized Aluminum in Chloride Environments

Electrochemical Noise Study on Galvanic Corrosion of Aluminum Alloy in Chloride Environments- Effect of Oxide Film Structure

Electrochemical Noise Study on Galvanic Corrosion of Aluminum Alloy in Chloride Environments- Effect of Oxide Film Structure

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