Accelerated Atmospheric Corrosion Testing Using a Cyclic Wet/Dry Exposure Test:<i>Galvanic Couples of Aluminum with Graphite Neoprene Rubber, Galvanized Steel, and Steel</i>

Lyon, S.B.; Thompson, G.E.; Johnson, J. E.; Wood, G. C.; Ferguson, Jim

doi:10.5006/1.3585006

Cited by 10 publications

(5 citation statements)

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Section: Discussionsupporting

confidence: 91%

“…Inside ACSR, steel was shown to form oxides, 73 in agreement with our observations. In the literature, aluminum is said to be less noble than steel [73][74][75][76][77][78][79] which was also observed here, but the corrosion of steel during galvanic corrosion was not explained as extensively as in this work. This can be explained by the dissolution of the passive film on aluminum due to a low pH 19,80,81 or due to chlorides that help the complexation of Al(OH) 3 .…”

Section: Discussionsupporting

confidence: 91%

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Corrosion of Old Overhead Lines: Insights into Aluminum-Steel Galvanic Couple Using Electrochemical Techniques

Ramírez Rico,

Heurtault,

Said

et al. 2024

J. Electrochem. Soc.

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In order to explain the corrosion inside 20th century power lines, the galvanic corrosion of steel and aluminum from 1949 was examined. In this investigation, 0.1 M Na2SO4 + 1 mM NaCl was used as moderately corrosive medium. Various electrochemical methods were applied to determine the corrosion potential and the different reactions involved in the corrosion process. The thickness of the oxide layer that regulates the corrosion of aluminum was obtained from impedance measurement and it was shown that the diffusion of oxygen through a porous oxide layer is the governing stage for the reaction occurring at the steel electrode. Finally, the corrosion of steel regulates the corrosion of both metals when they are in electrical contact.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 91%

Corrosion of Old Overhead Lines: Insights into Aluminum-Steel Galvanic Couple Using Electrochemical Techniques

Ramírez Rico,

Heurtault,

Said

et al. 2024

J. Electrochem. Soc.

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“…Specifically, a cyclic wet/dry exposure method was employed, which alternately put metal samples in a liquid corrosive solution and the air. Pacheco and Ferreira [33], Mansfeld and Kenkel [34] and Lyon et al [35] pointed out that the experiment result of a cyclic exposure test agrees well with the real corrosion effect of a hanging film for a year and even longer.…”

Section: Methodsmentioning

confidence: 65%

“…[Å]; ε is the interaction energy of HCl and H 2 O, subjected to [erg]; Ω is the collision integral; and K B is the Boltzmann constant with the value of 1.38×10 -6 erg/K. According to Nernst formula [31], the liquid phase diffusion rate is (35) where and are the electrical conductivities of cation and anion, respectively; and are the absolutes of positive and negative ion valency, respectively. (3) Mass transfer coefficient The mass transfer flux is written as (36) where K x and K y are the overall mass transfer coefficients based on liquid or gas phase, respectively [kmol/(m 2 •s)]; K is the overall mass transfer coefficients of the whole system, [kmol/(m 2 •s)]; x and y are the HCl fractions in the liquid phase and gaseous phase before the mass transfer, respectively; x e is the molar fraction of liquid phase which is in phase equilibrium with y; and y e is the molar fraction of gaseous phase which is in phase equilibrium with x.…”

Section: Mass Transfer Modelmentioning

confidence: 99%

Chlorine corrosion of blast furnace gas pipelines: Analysis from thermal perspective

Zhang

2019

J min metall B Metall

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With the broad application of dry dedusting of blast furnace gas (BFG), the issue of BFG pipeline corrosion comes up because of chlorine in the BFG. Existing methods in preventing the corrosion, such as spraying alkali or installing corrosion-resistant materials, require a significant amount of investment. This paper conducted a novel thermal analysis of the corrosion mechanism to support the study on corrosion prevention without using additional materials. Firstly, thermal models were established to reflect the relationships among the amount of condensation water, the mass transfer rate, the concentration of chloride ion and the ambient temperature. Secondly, the relationship between BFG temperature and the corrosion rate was obtained via a cyclic exposure experiment. Key factors that affect the pipeline corrosion under various BFG temperatures were identified. Finally, a control scheme of the BFG temperature was proposed to avoid the chlorine corrosion.

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“…Lyon et al[104] conducted accelerated atmospheric corrosion testing on Al wires centrally reinforced with galvanized steel. Lyon et al following Timmins wet/dry cycle[103] and had two sets of experiments with varying salt concentration.…”

mentioning

confidence: 99%

Correlation Studies between Outdoor Exposure and Accelerated Laboratory Corrosion Tests for Galvanic and Non-Galvanic Ceramic-Aluminum Couples

Srinivasan,

Hihara

2008

Meet. Abstr.

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The objective of this research was to develop test protocols to analyze the corrosion between aluminum and ceramics in accelerated and natural-exposure corrosion tests. The focus was on correlating outdoor exposure corrosion behavior from a variety of microclimates with a series of accelerated laboratory corrosion tests for both galvanic and non-galvanic ceramic-aluminum (Al) couples. Electrolytes with varying amounts of chloride contents (0, 10, 100, 1000, 10000, and 20000 ppm chlorides) were used in the accelerated tests to improve correlation with field results. In addition, the outdoor exposure test data were used to adjust the duration of the accelerated corrosion tests so that the corrosion damage accumulated in the accelerated tests could better represent the corrosion damage accumulated in the field. The galvanic ceramic-Al couples were those consisting of Al coupled to titanium diboride (TiB 2 ) and boron carbide (B 4 C) ceramics which have resistivities of 10 -5 and 10 1 ohm-cm, respectively. The non-galvanic couples consisted of Al coupled to silicon carbide (SiC), silicon nitride (Si 3 N 4 ), and aluminum nitride (AlN) ceramics which have resistivities of 10 7 , 10 14 , and 10 15 ohm-cm, respectively. Ceramics and 6061-T6 Al coupons were coupled together using 6061-T6 Cclamps. Outdoor experiments for 3, 6, and 12-month exposure periods were conducted at eight different test sites, to determine corrosion behavior for various climate and environmental conditions (i.e., rain forest, alpine, marine, volcanic, industrial, agricultural, and arid). Accelerated laboratory experiments include controlled humiditychamber experiments and cyclic corrosion test chamber (CCTC) experiments following modified GM9540P using different chloride-containing solutions. Corrosion rates were v determined at the ceramic-Al interface for the outdoor and accelerated laboratory experiments using weight loss data. Polarization experiments were conducted on 6061-T6 Al to study the governing corrosion mechanisms in different chloride solutions. Zeroresistant ammeter (ZRA) studies were conducted between 6061-T6 Al and the conductive ceramics (TiB 2 ) inside a humidity chamber by spraying different chloride solutions in intervals of 24 hours for 5 days to simulate rain and the steady-state galvanic corrosion rates (i Galv ) were observed.

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Accelerated Atmospheric Corrosion Testing Using a Cyclic Wet/Dry Exposure Test:Galvanic Couples of Aluminum with Graphite Neoprene Rubber, Galvanized Steel, and Steel

Cited by 10 publications

References 0 publications

Corrosion of Old Overhead Lines: Insights into Aluminum-Steel Galvanic Couple Using Electrochemical Techniques

Corrosion of Old Overhead Lines: Insights into Aluminum-Steel Galvanic Couple Using Electrochemical Techniques

Chlorine corrosion of blast furnace gas pipelines: Analysis from thermal perspective

Correlation Studies between Outdoor Exposure and Accelerated Laboratory Corrosion Tests for Galvanic and Non-Galvanic Ceramic-Aluminum Couples

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