Sudden Onset of Pitting Corrosion on Stainless Steel as a Critical Phenomenon.

Punckt, Christian; Boelscher, M.; Rotermund, Harm Hinrich; Mikhailov, A. S.; Organ, Levent; Budiansky, Noah; Scully, John R.; Hudson, John L.

doi:10.1002/chin.200444018

Cited by 27 publications

(38 citation statements)

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“…The metal surface apparently has a fixed number of these inclusions, i.e. sites for pit nucleation, as observed in recent works by Punckt et al [21] and Zimer et al [22]. The absence of pit creation at close distance of already existing pits is another issue http://dx.doi.org/10.1016/j.corsci.2014.01.010 0010-938X/Ó 2014 Elsevier Ltd. All rights reserved.…”

Section: Introductionmentioning

confidence: 81%

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Modeling pitting corrosion by means of a 3D discrete stochastic model

et al. 2014

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Section: Introductionmentioning

confidence: 81%

“…Distributions and characteristics of pitting sites on metal surfaces have been determined through microscopic inspection [21,22]. The metal surface apparently has a fixed number of these inclusions, i.e.…”

Section: Introductionmentioning

confidence: 99%

Modeling pitting corrosion by means of a 3D discrete stochastic model

et al. 2014

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“…Finally and more oriented into a chemical engineering context, other instances of the interaction between patterning and noise are those related to turbulent mixing ͑Ottino, 1989; Reigada et al, 1997͒ andlocalized corrosion ͑Costa et al, 1991;Punckt et al, 2004͒. …”

Section: Chemical Reactionsmentioning

confidence: 99%

Spatiotemporal order out of noise

2007

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Natural systems are undeniably subject to random fluctuations, arising from either environmental variability or thermal effects. The consideration of those fluctuations supposes to deal with noisy quantities whose variance might at times be a sizable fraction of their mean levels. It is known that, under these conditions, noisy fluctuations can interact with the system's nonlinearities to render counterintuitive behavior, in which an increase in the noise level produces a more regular behavior. In systems with spatial degrees of freedom, this regularity takes the form of spatiotemporal order. An overview is presented of the mechanisms through which noise induces, enhances, and sustains ordered behavior in passive and active nonlinear media, and different spatiotemporal phenomena are described resulting from these effects. The general theoretical framework used in the analysis of these effects is reviewed, encompassing the theory of stochastic partial differential equations and coupled sets of ordinary stochastic differential equations. Experimental observations of self-organized behavior arising out of noise are also described, and details on the numerical algorithms needed in the computer simulation of these problems are given.

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“…The non-metallic inclusions are known to be preferred sites for the nucleation of pits on steels [11][12][13]. Steel corrosion studies have been conducted using aggressive media, such as NaCl, HCl and H2SO4 at relatively high concentration.…”

Section: Introductionmentioning

confidence: 99%

Corrosiveness of Brazilian Candiota Coal

2015

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Candiota city, in the south of Brazil, is located near the largest reserves of mineral coal of the country. This coal is used for thermoelectric power generation. The extraction of coal from open-cut mines involves operations may generate at least some particulate matter into the atmosphere. These particles retained on the surface of metallic structures exposed to the atmosphere, may adsorb gases such as CO, CO2, SO2 and NO, which, in combination with humid air form corrosive substances, such as HNO3 and H2SO4. This paper aims to evaluate the influence of Candiota coal on the corrosion of buried steel structures and exposed to atmosphere containing particulate matter from coal combustion. The coal sample was characterized by SEM (scanning electron microscopy), thermogravimetric analysis (TGA), surface area analysis (BET method), electrical conductivity (EC) analysis, FTIR and Raman spectroscopy. Corrosion was simulated by exposure of steel samples to coal particles and thermoelectric industrial atmosphere. Electrochemical tests of solutions leached from the coal were conducted by voltammetry to evaluate the soluble compounds corrosiveness. The corrosion rate was determining following the technical standard ASTM G1-90. Localized attacks and corrosion products formations were detected in API 5L Grade B steel exposure to coal. The average corrosion rate for the samples in direct contact to the pulverized coal was 0.15 mm/year, while in samples exposed to the atmosphere from industrial power plant was 0.30 mm/year. It is concluded that API 5L Grade B steel metal structures, exposed to atmospheres rich in Candiota coal and its derivatives, must be properly protected and monitored to avoid future damage caused by corrosion.

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Sudden Onset of Pitting Corrosion on Stainless Steel as a Critical Phenomenon.

Cited by 27 publications

References 1 publication

Modeling pitting corrosion by means of a 3D discrete stochastic model

Modeling pitting corrosion by means of a 3D discrete stochastic model

Spatiotemporal order out of noise

Corrosiveness of Brazilian Candiota Coal

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