Comparing Modeled and Experimental Accelerated Corrosion Tests on Steel

Steen, Nils Van den; Simillion, Hans; Thierry, Dominique; Terryn, Herman; Deconinck, Johan

doi:10.1149/2.0951709jes

Cited by 24 publications

(12 citation statements)

References 32 publications

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“…2 Electrical resistance sensors based on the reduction of the cross section of a metal track by corrosion can be employed to monitor atmospheric corrosion in real time. 6 The method has been employed to study carbon steel and zinc exposed in accelerated tests, 6,7 but not yet for Mg alloys. Possible errors of the resistance method could be caused by a conductive electrolyte film that influences the measured resistance.…”

mentioning

confidence: 99%

“…Possible errors of the resistance method could be caused by a conductive electrolyte film that influences the measured resistance. 7 The primary cathodic reaction of Mg alloy corrosion in aqueous electrolytes is generally believed to be hydrogen evolution. 1,2 Therefore, H 2 evolution measurements are frequently used to determine corrosion rates of Mg samples under immersion conditions.…”

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confidence: 99%

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Real-Time Monitoring of Atmospheric Magnesium Alloy Corrosion

Strebl

Virtanen

2018

J. Electrochem. Soc.

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The atmospheric corrosion progress of Mg alloys is traditionally tracked by determining mass loss of the samples after exposure. This method provides only an average corrosion rate over the exposure time and is destructive. The work presented introduces a new non-destructive method for real-time monitoring of atmospheric Mg alloy corrosion rates based on the evolved hydrogen gas. This is realized with an adaption of the gravimetric hydrogen collection method. The effect of temperature and atmospheric pressure variations during the experiment can be compensated and reliable atmospheric hydrogen evolution rates can be measured. The new technique was applied to monitor real-time atmospheric corrosion rates of Mg alloys AZ31 and AZ91 with different amounts of NaCl contamination. Comparing the results of the gravimetric hydrogen method with mass loss experiments reveals a good correlation of the consumed charge over the total exposure time, thus validating the new technique. Evidence for the contribution of O 2 reduction reaction to cathodic processes on Mg alloy atmospheric corrosion is presented.

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confidence: 99%

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Real-Time Monitoring of Atmospheric Magnesium Alloy Corrosion

Strebl

Virtanen

2018

J. Electrochem. Soc.

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“…Atmospheric localized corrosion occurs when a thin film electrolyte or droplet is formed, often periodically (i.e., due to wet-dry cycling), on the material's surface. [112][113] The majority of the modeling work discussed above is relevant to full immersion such that the geometry of the electrolyte has little or no effect on the corrosion processes. All forms of localized corrosion can occur under atmospheric conditions, so only studies in which the characteristics of atmospheric exposure are important are reviewed here.…”

Section: Atmospheric Localized Corrosionmentioning

confidence: 99%

A Review of the Application of Finite Element Method (FEM) to Localized Corrosion Modeling

Kelly

2019

CORROSION

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The modeling of localized corrosion has usually focused on calculating the spatial and/or temporal distributions of chemical species, potential, and current. These are affected by the reactions considered, the geometry, and the modes of mass transport of importance. Finite element method (FEM) is a numerical technique to obtain approximate solutions to the differential equations based on different types of discretization in which the domain of interest is divided into different types of elements. The introduction of the FEM opened a variety of opportunities for increasing the complexity, and therefore the fidelity, of the localized corrosion conditions considered. This article first briefly introduces the FEM technique before describing the choices the modeler has with regards to the governing equations for the system. The history of the application of FEM to localized corrosion is given, highlighting the different aspects of localized corrosion that have been successfully modeled. Finally, some of the current challenges in FEM modeling of localized corrosion are outlined.

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“…This can be prevented by suitably coating AA7075 surface for improving the corrosion resistance [5]. Atmospheric galvanic corrosion occurs when thin electrolyte film ranging from 1 µm to 10 mm develops on the metal surface [6][7]. The electrolyte film thickness [8] is greatly affected by the relative humidity of the environment, salt load density and roughness of the material surface.…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers have adopted finite element based modeling to understand the interaction between various bimetallic galvanic couples and electrolyte to predict their corrosion behavior. These galavanic couples include Iron -Zinc [9]; AA7050 Aluminium -316 L Steel [10]; AA5083 aluminium -H116 steel [11]; AA2024 Aluminium-CFRP [12][13] and Zinc -Steel [7].…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of Graphene reinforced Al-12Si coated 7075 Aluminium alloy

Achutarao¹,

Roy²,

Murthy³

et al. 2022

Mater. sci. eng., appl.

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This paper aims at investigating the effect of graphene reinforced Al-Si coatings on the corrosion behavior of AA7075 aluminium alloy. Al - 12Si alloy powder reinforced with 0.5 and 1 wt.% graphene was plasma sprayed on AA7075 substrate. Potentiodynamic polarization measurements were performed using CHI660E-CH electrochemical workstation. It was observed that 0.5 wt.% graphene reinforced Al-Si coating enhanced the corrosion potential from –0.893 to –0.761 V and reduced the corrosion current density from 1.3×10-4 to 9.78×10-6 A/m2. The atmospheric galvanic corrosion was simulated using COMSOL Multiphysics finite element package. It was observed that AA7075 aluminium electrode potential with respect to AISI 4340 steel increased from –0.76 to –0.59 V. The least average current density of 0.95 A/m2 was observed at 95 % relative humidity and 0.0035 kg/m2 salt load density indicating the minimum corrosion rate for 0.5 wt.% graphene reinforced Al-Si coated AA7075 substrate. The simulation also confirmed that 0.5 wt.% graphene reinforcement in Al-Si coatings enhanced the corrosion behavior of AA7075 when compared with 1 wt.% graphene reinforcement.

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Comparing Modeled and Experimental Accelerated Corrosion Tests on Steel

Cited by 24 publications

References 32 publications

Real-Time Monitoring of Atmospheric Magnesium Alloy Corrosion

Real-Time Monitoring of Atmospheric Magnesium Alloy Corrosion

A Review of the Application of Finite Element Method (FEM) to Localized Corrosion Modeling

Corrosion behavior of Graphene reinforced Al-12Si coated 7075 Aluminium alloy

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