Untersuchungen über die gleichmä§ige Auflösung und den Lochfra§ von Aluminiumelektroden*

Kaesche, Helmut

doi:10.1524/zpch.1962.34.1_4.087

Cited by 138 publications

(31 citation statements)

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“…Values of b < 1 clearly indicate a decreasing growth rate with time as shown, for example, on aluminum in various tap waters [79]. Numerous investigations have confirmed that the presence of chlorides is necessary for pit growth and that the growth rate increases with increasing chloride concentration [84][85][86][87][88][89][90]; other anions, however, behave differently. Numerous investigations have confirmed that the presence of chlorides is necessary for pit growth and that the growth rate increases with increasing chloride concentration [84][85][86][87][88][89][90]; other anions, however, behave differently.…”

Section: E1 Growth Kineticsmentioning

confidence: 96%

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Localized Corrosion of Passive Metals

Böhni

2011

Uhlig's Corrosion Handbook

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Section: E1 Growth Kineticsmentioning

confidence: 96%

“…The effect of salt films formed within the pit during the initiation or growth process has been discussed frequently [84,118,119]. Beck and Alkire [103] and Beck and Chan [127] demonstrated convincingly that the formation of salt films on stainless steels may be important for the stability of growing pits.…”

Section: F Stability Of Localized Corrosionmentioning

confidence: 99%

Localized Corrosion of Passive Metals

Böhni

2011

Uhlig's Corrosion Handbook

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“…[39] This oxygen reduction inhibition is crucial for retarding pit formation. [31,40] Oxygen reduction is necessary for the formation of enough OH-species to favor the aluminum dissolution, as initially showed by Edeleanu and Evans, [39] later elucidated by other authors, [41,42] and expressed in the following equation:…”

Section: Ocp and Potentiodynamic Polarization Measurementmentioning

confidence: 97%

“…With the increase of potential, the density of tunnels increased, and the gross pit formation (Figures 3b and 4b) took place by coalescence of many tunnels that augmented the pit volume filled with acidic electrolyte. [41,52] In addition, these particles ( Figures 3b,c and 4b,c) are not expected to be precipitates or second phases, given the absence of important amounts of alloy elements in the material composition. [29] However, when in presence of the highest PIL concentration, the surface presented even less pit density (Figure 5a and Table 3) and the formed pits were the smallest-sized obtained when compared to those found with none and less inhibitor concentrations (Figures 3 and 4).…”

Section: Morphological Characterizationmentioning

confidence: 99%

2‐hydroxyethilammonium oleate protic ionic liquid as corrosion inhibitor for aluminum in neutral medium

Ortega-Vega

Mattedi

Schroeder

et al. 2020

Materials & Corrosion

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Protic ionic liquid (PIL) 2‐hydroxyethylammonium oleate (2HEAOl) proved to be a good lubricant for aluminum‐forming processes. However, with the aim of keeping the formed component integrity, it is interesting that the same substance employed during forming does not need to be removed and works out as corrosion inhibitor. Then, the aim of this study was to test the performance of 2HEAOl as corrosion inhibitor for aluminum in neutral 0.5 mol/L NaCl medium by electrochemical characterization. Results showed that the concentration of 5 × 10−4 mol/L was a suitable concentration to promote corrosion inhibition until 72 h at the high chloride concentration studied. The PIL worked out as mixed‐type organic corrosion inhibitor, as it promoted the diminution of the oxygen reduction reaction rate and, in consequence, the pit initiation by its adsorption on the metal surface.

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“…is expected to be the main cathodic reaction. This includes the evolution of H2 from pits on corroding aluminium 24,25 or (stainless) steels 26,27 . HER resulting from the galvanic coupling 28 of defective Zn coatings on steel can lead to H2 embrittlement and stress corrosion cracking.…”

Section: + + − → −mentioning

confidence: 99%

Respirometric In-Situ Methods for Real-Time Monitoring of Corrosion Rates: Part I. Atmospheric Corrosion

Strebl¹,

Bruns²,

Virtanen³

2019

Preprint

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A novel respirometric approach to monitor atmospheric corrosion kinetics is presented. Simultaneous real-time monitoring of the H2 evolution reaction (HER) and the O2 reduction reaction (ORR) is possible with a combination of optical O2 sensor measurements with gravimetric volume sensitive techniques or pressure sensor based techniques in closed chambers. The respirometric method is a universal, non-destructive tool applicable to any metal or alloy. It shows a high sensitivity for low corrosion rates and has a high time-resolution. Different examples of relevant engineering metals and alloys will be provided. Mass loss validation measurements carried out at the end of exposure show a good correlation with the total recorded cathodic charge. For metals with different oxidation states the average valency in the corrosion products can be calculated from the cathodic charge together with mass loss. The versatility of the novel monitoring technique is further demonstrated by studying the influence of wet-dry cycling, temperature steps or changes in the gas composition in-situ. The rate of HER, ORR and total corrosion rate during these changing exposure conditions can be tracked directly on the same sample. Overall the new method contributes to bridging the gap between lab tests, accelerated testing and field exposure.

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Untersuchungen über die gleichmä§ige Auflösung und den Lochfra§ von Aluminiumelektroden*

Cited by 138 publications

References 0 publications

Localized Corrosion of Passive Metals

Localized Corrosion of Passive Metals

2‐hydroxyethilammonium oleate protic ionic liquid as corrosion inhibitor for aluminum in neutral medium

Respirometric In-Situ Methods for Real-Time Monitoring of Corrosion Rates: Part I. Atmospheric Corrosion

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