Corrosion Behaviour Corrosion Behaviour of Cold-Deformed Austenitic Alloys

Ozgowicz, W.; Kurc-Lisiecka, A.; Grajcar, A.

doi:10.5772/53590

Cited by 11 publications

(10 citation statements)

References 39 publications

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“…Earlier explanations in this section already established the relation between the deformation process with texture and corrosion resistance. 32 Deformation conditions also affect stacking fault energy. This is responsible for the change in the phase stability and phase transformation.…”

Section: Role Of Texture In Corrosion Of Carbon Steelsmentioning

confidence: 99%

Carbon steel corrosion: a review of key surface properties and characterization methods

2017

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Section: Role Of Texture In Corrosion Of Carbon Steelsmentioning

confidence: 99%

Carbon steel corrosion: a review of key surface properties and characterization methods

2017

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“…Figure 1a presents an SEM image of 304 stainless steel, degreased with acetone and chemically activated in a KOH solution. The image shows grains and crackings on the steel surface, typical of austenitic steel [29], which confirms partial etching of the steel surface taking place upon such a chemical activation. The EDS spectrum of the purified steel (Figure 2a) shows signals assigned to iron, chromium and nickel, while the signal attributed to carbon atoms is very weak, confirming total removal of organic impurities from the steel surface.…”

Section: Physicochemical and Surface Morphology Analysismentioning

confidence: 57%

The Rapeseed Oil Based Organofunctional Silane for Stainless Steel Protective Coatings

et al. 2020

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The earlier obtained organosilicon derivatives of rapeseed oil were used for the production of coatings protecting steel surface against corrosion. Vegetable oils have been hitherto used for temporary protection of metals against corrosion, while thanks to the synthesis of appropriate organosilicon derivatives, it is now possible to create durable protective coatings. Due to the presence of alkoxysilyl groups and the use of the sol-gel process, the coatings obtained were bonded to the steel surface. The effectiveness of the coatings was checked by electrochemical methods and steel surface analysis.

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“…Of particular concern for SCC in stainless steels is the formation of martensite, a phase that is brittle and susceptible to fracture and corrosion [14]. The fracture surfaces of initially austenitic stainless steel that has failed by SCC show that brittle failure has occurred, which is most often accompanied by the presence of martensite on the fracture surface [15,16].…”

Section: Microstructural Considerations For Sccmentioning

confidence: 99%

Dislocation generation and cell formation as a mechanism for stress corrosion cracking mitigation

Brandal¹,

Yao²

2016

International Congress on Applications of Lasers &Amp; Electro-Optics

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The combination of a susceptible material, tensile stress, and corrosive environment results in stress corrosion cracking (SCC). Under these suitable conditions, brittle and catastrophic failure occurs at levels much lower than the material's ultimate tensile strength. While several different mechanisms of failure occur for SCC, hydrogen from the corrosive environment penetrating into the lattice is often a common theme. Laser shock peening (LSP) has previously been shown to prevent the occurrence of SCC on stainless steel. Compressive residual stresses from LSP are often attributed with the improvement, but this simple explanation does not explain the electrochemical nature of SCC by capturing the effects of microstructural changes from LSP processing and its interaction with the hydrogen atoms on the microscale. As the hydrogen concentration of the material increases, a phase transformation from austenite to martensite occurs. This transformation is a precursor to SCC failure, and its prevention would thus help explain the mitigation capabilities of LSP. In this paper, the role of LSP induced dislocations counteracting the driving force of the martensitic transformation is explored. Stainless steel samples are LSP processed with a range of incident laser intensities and overlapping. Cathodic charging is then applied to accelerate the rate of hydrogen absorption. Using XRD, martensitic peaks are found after 24 hours in samples that have not been LSP treated. But martensite formation does not occur after 24 hours in LSP treated samples. Transmission electron microscopy is used for determining the resulting structure and dislocation densities. The arrangement of the dislocations, for example forming cell like structures, is important to the hydrogen trapping capabilities. A finite element model predicting the dislocation density and cell formation is also developed to aid in the interpretation.

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Corrosion Behaviour Corrosion Behaviour of Cold-Deformed Austenitic Alloys

Cited by 11 publications

References 39 publications

Carbon steel corrosion: a review of key surface properties and characterization methods

Carbon steel corrosion: a review of key surface properties and characterization methods

The Rapeseed Oil Based Organofunctional Silane for Stainless Steel Protective Coatings

Dislocation generation and cell formation as a mechanism for stress corrosion cracking mitigation

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