Contribution of anodic dissolution and hydrogen embrittlement to corrosion-fatigue crack growth

Ratych, L. V.

doi:10.1007/bf02355475

Cited by 2 publications

(5 citation statements)

References 12 publications

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“…Relatively little research is dedicated to the nucleation mechanism of corrosion cracks in welded structures. Moreover, although theories such as hydrogen-induced cracking and anodic dissolution can reveal the corrosion crack nucleation mechanism of nonwelded structures to some extent [28][29][30][31], such traditional theories are not sufficient to reveal the nucleation mechanism of corrosion cracks in welded structures because of the particularities in terms of crystal structure and residual stress distribution of welded structures.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Crack Nucleation Mechanism in the Welded Structures of X65 Steel in Natural Seawater

Bai

Gao

Jiang

2018

Advances in Materials Science and Engineering

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The nucleation mechanism of corrosion cracks in welded structures in natural seawater has been revealed through investigation on the corrosion behavior of X65-welded structures in natural seawater. The evolution laws of surface corrosion morphology, residual stress, and areas of welded structures with the most serious corrosion damage were analyzed by microstructure observation, corrosion morphology observation, residual stress detection, and magnetic field detection. The results show that the main factors of determining surface corrosion morphology evolution law of welded structures are microstructures of the weld joint, heat-affected zone (HAZ), and the fusion line. Due to the difference of corrosion rates between the weld joint, HAZ, and the coarse Widmänstatten structure in fusion line, the fusion line of welded structures receives the most serious damage while being corroded. Meanwhile, mutual reinforcement of residual stress and corrosion damage on the surface of welded structures further accelerate the nucleation of corrosion cracks. Under the influences of microstructure, residual stress, and corrosion, corrosion cracks that are parallel to weld joints generate first in the fusion line of welded structures. Therefore, it makes welded structures the source of marine steel structures’ corrosion failure.

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Section: Introductionmentioning

confidence: 99%

Corrosion Crack Nucleation Mechanism in the Welded Structures of X65 Steel in Natural Seawater

Bai

Gao

Jiang

2018

Advances in Materials Science and Engineering

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“…The method of quantitative estimation of LAD and the mechanism of HC is based on the assumption [12,13]: The expression in the first approximation, based on the Faraday law, can be obtained as follows [12,15]:…”

Section: Mechanical Engineeringmentioning

confidence: 99%

“…The parameter ai=d * , where d * is the size of the pre-destruction zone [13,14]. pH tC , E tC parameters can be used for local anodic dissolution (LAD) and hydrogen cracking (HC) mechanism [12].…”

Section: Mechanical Engineeringmentioning

confidence: 99%

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Development of Information Support of Quality Management of Underground Pipelines

Yuzevych

Skrynkovskyy

Koman

2017

EUREKA: Physics and Engineering

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Recommendations are worked out in relation to the evaluation of longevity and quality of underground metallic pipelines in the conditions of corrosion fatigue. The features of early exposure of crisis (before accident) situations are set. A complex qualimetric criterion is offered for determination of level of quality of pipeline by the account of his technological specific. The elements of investment project and methodology of estimation of resource are worked out. and also influences of factors of different nature on risks and possibility of accident of gas pipelines. The model of corrosion fatigue of metal is based on power criterion of destruction mechanics according to which there is an act of destruction in an arbitrary elemental volume of a material if the total irreversibly scattered energy of plastic deformation for all load cycles will reach a critical value equal to the energy of destruction. In order to control the corrosion process taking the polarization potential into account, a criterion relation is used to determine the rate of residual corrosion of a metal in the defect of the insulation coating, in particular, at the top of the crack, which is an anode region. The adhesive strength criteria of biocorrosive aggressive soil, mechanical criteria for the stress intensity factor, the criterion of corrosion resistance defect, criterion correlation for estimating the speed of residual corrosion in defect of insulation coating with imposed diagnostic weight characteristics and diagnostic value of tests, that complement, clarify and improve the corrosion monitoring system of pipelines, helpful for controlling and optimizing of the corrosion process, and Development of recommendations for anti-corrosion protection of metal are used in areas with non-stationary plastic deformation.

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Contribution of anodic dissolution and hydrogen embrittlement to corrosion-fatigue crack growth

Cited by 2 publications

References 12 publications

Corrosion Crack Nucleation Mechanism in the Welded Structures of X65 Steel in Natural Seawater

Corrosion Crack Nucleation Mechanism in the Welded Structures of X65 Steel in Natural Seawater

Development of Information Support of Quality Management of Underground Pipelines

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