Zur Inhibition der Eisenkorrosion in wäßrigen Lösungen

Erbil, M.; Lorenz, W.J.

doi:10.1002/maco.19780290802

Cited by 21 publications

(10 citation statements)

References 13 publications

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“…8 for 3.5h and for longer exposure times, and the model in Eq. [6]. These results cast some doubt on the experimental data and the model proposed by Bonnel et al (24) and Duprat et al (25), who reported the occurrence of a second time constant at low frequencies (<0.1 Hz) for a carbon steel rotating disk electrode in 3% NaC1.…”

Section: Resultsmentioning

confidence: 85%

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Corrosion Inhibition in Neutral, Aerated Media

Mansfeld

Kendig

Lorenz

1985

J. Electrochem. Soc.

153

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The concepts of interface and interphase inhibition as two different types of corrosion inhibition mechanisms are discussed briefly. Most of the studies reported in the literature have dealt with interface inhibition in acid media. Experimental results of interphase inhibition have been obtained for a 4340 steel rotating cylinder electrode (RCE) by impedance measurements during exposure over 48h in aerated, neutral 0.5M Na2SO4 , 0.5M normalNaCl , tapwater and deionized water containing 10 normalmM NaNO2 , and mixtures of phosphonic acid/fatty amine or polyacrylic acid/fatty amine. An optimized approach for collecting impedance data for high Rnormalp values and a low frequency limit between 0.4 mHz and 5 mHz has been applied in this study. A very good fit of the experimental data to a theoretical model is observed. For the phosphonic acid/fatty mixture, a second time constant occurs at high frequencies in Na2SO4 and normalNaCl , from which the porosity of the inhibitor layer can be calculated.

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Section: Resultsmentioning

confidence: 85%

“…The impedance spectra for the inhibitor-free solution and for the presence of NaNO:, or inhibitor B conform to the model in Eq. [6]. The effect of the inhibitors is seen in the increase of Rp (low frequency limit of the impedance ]2~) and a lowering of the capacitance.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Inhibition in Neutral, Aerated Media

Mansfeld

Kendig

Lorenz

1985

J. Electrochem. Soc.

153

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“…In this practically important case both metal dissolution and oxygen reduction processes are strongly influenced by a 3-D surface inhomogeneity consisting of a porous oxidic layer, the formation of which depends on the corrosion time and the hydrodynamic conditions. 2-and 3-D surface layers may act as interface and interphase corrosion inhibitors, respectively (7,(11)(12)(13)(14)(15)(16)(17)(18)(19).…”

mentioning

confidence: 99%

Electrochemical Impedance Spectroscopy on 3‐D Inhomogeneous Surfaces: Corrosion in Neutral Aerated Solutions

Jüttner

Lorenz

Kendig

et al. 1988

J. Electrochem. Soc.

135

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“…In neutral oxygen-containing solutions. the iron dissolution is strongly inhibited by the formation of a porous oxide layer, which behaves like a membrane [91 controlling the oxygen diffusion [10][11][12]. Iron dissolution firstly occurs in the so-called prepassive range, however is shifted, depending on time, into the active range [ 12).…”

Section: Introductionmentioning

confidence: 99%

Growth of anodic films on iron and stainless steel in the presence of some organic inhibitors

Spinelli

Fratesi

Roventi

1983

Materials & Corrosion

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Da von den Korrosionserscheinungen nur geringfugige Anteile des Rohnnaterials betroffen sind, ist auch eine deutliche Veranderung der mechanischen Eigenschaften iiber die thermische Alterung hinaus nicht wahrscheinlich. Diese Aussage wird in den langzeitigen Zeitstandversuchen im Kreislauf Crevona bestatigt, die in einem nachfolgenden Versuchsprogramrn durchgefiihrt werden.Die Nachuntersuchungen haben neben vielen detaillierten Erscheinungen vor allem gezeigt, daB die hier verwendeten stabilisierten austenitischen Stahle X 8 CrNiNb 1613 und X 10 CrNiTi 189 fur den Anlagenbau mit Natrium f i r lange Einsatzzeiten bis zu Temperaturen von 973 K anwendbar sind.Sie sind damit in gleicher Weise fiir die Anwendung mit Natrium qualifiziert wie die weltweit bevorzugten Stahle AISI 304 und 316.Wir bedanken uns auch an dieser Stelle fiir die Beitrage von Frau Z . Peric und den Herren E. Nold, D. Schlindwein und G. Wittig zu dieser Arbeit.Growth of anodic films on iron and stainless steel 161 ~~- SchrifttumEllipsometry has been used to study the influence of Benzylamine, Benzotriazole and Hexamethylenetetramine on the growth of anodic oxides on iron and on AISI 304 stainless steel in borate-buffer solutions.On iron, a limitation of the growth-rate has been observed for these substances all over the passive potential range. On AISI 304 steel, when the electrode potential exceeds 400 mV (SCE), an increase of the anodic oxide growth-rate was found in the presence of the organic substances. Adsorption on the oxide film, according to the interpretation given by Pearson, is discussed.Mit Hilfe der Ellipsometrie wurde der EinfluB von Benzylamin, Benzotriazol und Hexamethylentetrarnin auf die Bildung von anodischen Oxiden auf Eisen und dem nichtrostendcn Stahl AlSl 304 in Boratpufferlosung untersucht. Auf Eisen fiihren demnach alle drei Substanzen zu einer Begrenzung der Wachstumsgeschwindigkeit im gesamten Bereich der passiven Potentiale. Auf dem Stahl 304 hingegen bewirken die Zusatzstoffe bei Potentialen iiber 400 mV (S E) zu einer Beschleunigung der Wachstumsgeschwindigkeit der anodischen Oxide. Der Wachstumsmechanismus wird entsprechend der Deutung von Pearson unter Annahme von Adsorptionsvorgangen am Oxidfilm diskutiert.

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Zur Inhibition der Eisenkorrosion in wäßrigen Lösungen

Cited by 21 publications

References 13 publications

Corrosion Inhibition in Neutral, Aerated Media

Corrosion Inhibition in Neutral, Aerated Media

Electrochemical Impedance Spectroscopy on 3‐D Inhomogeneous Surfaces: Corrosion in Neutral Aerated Solutions

Growth of anodic films on iron and stainless steel in the presence of some organic inhibitors

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