Fractal characteristics of stress corrosion cracking in SNCM 439 steel having different prior-austenite grain sizes

Kurose, Masashi; Hirose, Yukio; Sasaki, Toshihiko; Yoshioka, Yasuo

doi:10.1016/0013-7944(94)00303-3

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…However, it failed to clear up the relationship of eigenvalues and mechanism. Therefore, Kurose et al (Kurose et al, 1996) investigated the distribution and development of the corrosion crack using image analysis technology and found that the corrosion line of corrosion crack had fractal characterization compared with parameters such as grain size. A method was proposed to evaluate the corrosion stage of pure copper by fractal dimension.…”

Section: Introductionmentioning

confidence: 99%

Fractal characteristics of AC corrosion morphology of X80 pipeline steel in coastal soil solution

Kou

2019

ACMM

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Purpose Pipelines are seriously corroded due to the close distance between pipelines and high voltage transmission lines. The purpose of this paper is to study the influence of alternating current (AC) on corrosion behavior of X80 pipeline steel in coastal soil solution. Design/methodology/approach The corrosion behavior of X80 steel under different AC densities in coastal soil solution was investigated by electrochemical measurements and image processing technology. Furthermore, a quantitative description model of AC corrosion through fractal dimension of corrosion image was established. Findings The results show that under low AC density the X80 steel is mainly uniform corrosion, and once AC density reaches 150 A/m2, the corrosion morphology gradually turns to pitting corrosion with irregular circle. For another aspect, the fractal dimension of corrosion images shows that the two/three-dimensional fractal dimension increase with the increase of AC density, presenting a linear and an exponential relationship respectively. In addition, the variation of the three-dimensional fractal dimension is the same as that of average corrosion rate. The threshold of the increasing trend of fractal dimension as well as corrosion type is 150 A/m2. Originality/value The investigation provides a quantitative method to describe AC corrosion morphology through fractal dimension. Furthermore, the method is of benefit to process corrosion images automatically.

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Section: Introductionmentioning

confidence: 99%

Fractal characteristics of AC corrosion morphology of X80 pipeline steel in coastal soil solution

Kou

2019

ACMM

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A critical evaluation on efficacy of recrystallization vs. strain induced boundary migration in achieving grain boundary engineered microstructure in a Ni-base superalloy

et al. 2018

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Effect of cathodic protection potential change caused by alternating current interference on corrosion behavior of X90 steel in 3% NaCl solution

Wang¹

2022

International Journal of Electrochemical Science

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Cathodic protection (CP) is a key method widely used in corrosion protection of buried pipelines. However, under the condition of AC interference, the cathodic potential on the pipeline will change significantly, which will lead to serious corrosion of the pipeline. In this paper, the corrosion behavior of X90 steel under the changing CP potential caused by AC interference was studied by corrosion rate, corrosion morphology and polarization curve. The results showed that the larger the applied AC current density was, the more seriously the CP potential changed. The general corrosion rate and pitting rate of X90 steel increased linearly with the increase of change degree of CP potential, and the severity of surface corrosion was much greater than under the AC current density, showing the DC corrosion characteristic. The negative deviation of the corrosion potential of X90 steel was positively proportional to the change degree of the CP potential of X90 steel, and the corrosion current density was consistent with the general corrosion rate. Moreover, the anode control degree was much higher than that under the AC current density, which was mainly caused by the increase of galvanic cells on the surface corrosion.

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Fractal characteristics of stress corrosion cracking in SNCM 439 steel having different prior-austenite grain sizes

Cited by 3 publications

References 2 publications

Fractal characteristics of AC corrosion morphology of X80 pipeline steel in coastal soil solution

Fractal characteristics of AC corrosion morphology of X80 pipeline steel in coastal soil solution

A critical evaluation on efficacy of recrystallization vs. strain induced boundary migration in achieving grain boundary engineered microstructure in a Ni-base superalloy

Effect of cathodic protection potential change caused by alternating current interference on corrosion behavior of X90 steel in 3% NaCl solution

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