Determination of thickness and air-void distribution within the iron carbonate layers using X-ray computed tomography

Wang, Cailin; Hua, Yong; Nadimi, Sadegh; Taleb, Wassim; Li, Yuxing; Chen, Xiaohui; Neville, Anne

doi:10.1016/j.corsci.2020.109153

Cited by 13 publications

(9 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This fact can explain why the elastic modulus and nanohardness reported in the literature were higher for natural corrosion products than for artificial corrosion products. Another noteworthy phenomenon is that the porosity of the corrosion product layer likely decreases over time as its thickness increases [ 35 , 36 , 37 , 38 ]. The much thinner corrosion product layer obtained in the present study is more porous and looser than those reported by previous researchers, exhibiting a much lower elastic modulus and nanohardness.…”

Section: Resultsmentioning

confidence: 99%

The Constituent Phases and Micromechanical Properties of Steel Corrosion Layers Generated by Hyperbaric-Oxygen Accelerated Corrosion Test

2023

View full text Add to dashboard Cite

Hyperbaric oxygen-accelerated corrosion testing (HOACT) is a newly developed method to study in the labor the corrosion behavior of steel bars in concrete. This work aimed to intensively investigate the mechanical properties and microstructures of HOACT-generated corrosion products by means of nano-indentation tests, Raman micro-spectrometry, and scanning electron microscopy. The local elastic modulus and nanohardness varied over wide ranges of 6.8–75.2 GPa and 0.38–4.44 GPa, respectively. Goethite, lepidocrocite, maghemite, magnetite, and akageneite phases were identified in the corrosion products. Most regions of the rust layer were composed of a complex and heterogeneous mix of different phases, while some regions were composed of maghemite or akageneite only. The relationship between the micromechanical properties and typical microstructural features is finally discussed at the micro-scale level. It was found that the porosity of corrosion products can significantly influence their micromechanical properties.

show abstract

Section: Resultsmentioning

confidence: 99%

The Constituent Phases and Micromechanical Properties of Steel Corrosion Layers Generated by Hyperbaric-Oxygen Accelerated Corrosion Test

2023

View full text Add to dashboard Cite

show abstract

“…Besides, the outer corrosion products with sheet-shaped clusters characterized as a looser structure which may cause pore connectivity within the outer layer. Wang et al (Li et al, 2019a;Wang et al, 2021) illustrated that the localized corrosion at CO 2 -containing environments was corresponding to the connected pores in the corrosion product scale. The fast kinetics resulted in the small pore sizes as the quicker formation of crystalline FeCO 3 .…”

Section: The Formation Of the Corrosion Product Scales In Kineticsmentioning

confidence: 99%

Formation and Evolution of the Corrosion Scales on Super 13Cr Stainless Steel in a Formate Completion Fluid With Aggressive Substances

Yue

Huang

et al. 2022

Front. Mater.

Self Cite

View full text Add to dashboard Cite

The formation and evolution of the corrosion scales on the super 13Cr stainless steel (SS) surface after exposure in a formate completion fluid with the presence of various aggressive substances was investigated. The results indicate that the formation of Fe3O4 covered the surface of super 13Cr SS as the inner layer accompanied with outer scattered FeS. The corrosion rate was below 0.07 mm/year after 120 h of exposure in the formate fluid at 180°C under N2 environments; the presence of aggressive substances such as sulfide and CO2 in the formate fluid promoted the proceeding of anodic dissolution in the early period, and the ingress of CO2 progressively increased the general corrosion rate to 1.7 mm/year. For CO2-containing conditions, the formation of FeCr2O4 and Cr(OH)3 was detected in the inner corrosion product layers, and the precipitation of “sheet”-shaped iron carbonate (FeCO3) was detected as the outer layer. The accumulation rate of corrosion products increases by two orders of magnitude with the ingress of CO2, corresponding to thicker corrosion products, but the dissolution rate is still three orders of magnitude higher than when CO2 was absent.

show abstract

“…To characterise the compactness and analyse the anti-corrosion properties of the protective scales, it is necessary to develop a method to quantify the internal pore characteristics such as porosity, pore connectivity and pore size distribution. The porosity can be determined by several methods such as nitrogen adsorption [36,37], mercury intrusion porosimetry (MIP) [38][39][40], X-ray micro-computed tomography (µCT) [41][42][43] and electrochemical methods [44][45][46]. The porosity of FeCO 3 scales was calculated by Gao et al [19] via the nitrogen adsorption method and they found that there was a linear relationship between porosity and the protectiveness of FeCO 3 against general corrosion.…”

Section: Introductionmentioning

confidence: 99%

“…The porosity of FeCO 3 scales was calculated by Gao et al [19] via the nitrogen adsorption method and they found that there was a linear relationship between porosity and the protectiveness of FeCO 3 against general corrosion. Recently, MIP was used to determine the porosity and pore size distribution of FeCO 3 by Wang et al [41], and the results were compared with that of µCT technique combined with novel image processing algorithms. The µCT results…”

Section: Introductionmentioning

confidence: 99%

Anti-corrosion characteristics of FeCO3 and Fe Ca Mg CO3 scales on carbon steel in high-PT CO2 environments

Wang

Hua

Nadimi

et al. 2022

Chemical Engineering Journal

Self Cite

View full text Add to dashboard Cite

Determination of thickness and air-void distribution within the iron carbonate layers using X-ray computed tomography

Cited by 13 publications

References 50 publications

The Constituent Phases and Micromechanical Properties of Steel Corrosion Layers Generated by Hyperbaric-Oxygen Accelerated Corrosion Test

The Constituent Phases and Micromechanical Properties of Steel Corrosion Layers Generated by Hyperbaric-Oxygen Accelerated Corrosion Test

Formation and Evolution of the Corrosion Scales on Super 13Cr Stainless Steel in a Formate Completion Fluid With Aggressive Substances

Anti-corrosion characteristics of FeCO3 and Fe Ca Mg CO3 scales on carbon steel in high-PT CO2 environments

Contact Info

Product

Resources

About