Numerical Analysis of Cathodic Protection Distance for Steel-Zinc Couple under Thin Layer Electrolytes

Okada, Nobuhiro; Takebayashi, Miki; Matsumoto, Masamitsu; Kimoto, Masanari; Kodou, Takeo

doi:10.2355/tetsutohagane1955.92.11_667

Cited by 8 publications

(6 citation statements)

References 15 publications

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“…13) Although a uniform electric conductivity in an electrolyte is assumed in the ordinary model, electric conductivity is not uniform where ions distribute with no uniformity in the electrolyte. The electric conductivity is calculated from Eq.…”

Section: Potential and Current Densitymentioning

confidence: 99%

“…In this study, the polarization behavior is given by the simple polarization curve model 13) that represents the anodic current density by Tafel equation and decides the cathodic current density as oxygen flux.…”

Section: Potential and Current Densitymentioning

confidence: 99%

“…For the neutral molecule, we can calculate by neglecting the first term on the right-hand side of Eq. (13). In order to compute Eq.…”

Section: Ions Movement and Electroneutralitymentioning

confidence: 99%

“…(14) as rϭ0 from iϭ1 to NϪ1 in Eq. (13). However, the errors of numerical analysis pile up in the component N which is given by Eq.…”

Section: Ions Movement and Electroneutralitymentioning

confidence: 99%

“…The cathodic protection distance in the 50 ppm NaCl solution with 1mm thickness is around 2 mm, while it is over 25 mm in the case of 50 000 ppm solution. 13) That is, Zn within 2 mm from the Zn/Fe interface dissolved in the 50 ppm solution due to the restricted distance of cathodic protection. On the other hand, all range of Zn dissolved in the case of 50 000 ppm solution.…”

Section: Dependence Of Nacl Concentrationmentioning

confidence: 99%

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Numerical Analysis Model of Galvanic Corrosion with Ion Movement and Reactions

Okada¹,

Matsumoto²,

Nishihara³

et al. 2010

ISIJ Int.

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Section: Potential and Current Densitymentioning

confidence: 99%

Section: Potential and Current Densitymentioning

confidence: 99%

“…For the neutral molecule, we can calculate by neglecting the first term on the right-hand side of Eq. (13). In order to compute Eq.…”

Section: Ions Movement and Electroneutralitymentioning

confidence: 99%

“…(14) as rϭ0 from iϭ1 to NϪ1 in Eq. (13). However, the errors of numerical analysis pile up in the component N which is given by Eq.…”

Section: Ions Movement and Electroneutralitymentioning

confidence: 99%

Section: Dependence Of Nacl Concentrationmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Analysis Model of Galvanic Corrosion with Ion Movement and Reactions

Okada¹,

Matsumoto²,

Nishihara³

et al. 2010

ISIJ Int.

Self Cite

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Influences of Concentration and Thickness of MgCl<sub>2</sub> Solution Layer on Pit Initiation of Type 304 Stainless Steel in Atmospheric Environment

Hirohata

Ota

Haruna

et al. 2017

J. Japan Inst. Metals and Materials

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This paper aimed to investigate conditions for pit initiation on type 304 stainless steel under MgCl 2 solution layer in atmospheric environment using a CCD camera system and a surface potential measurement equipment. A droplet of dilute MgCl 2 solution was put on the specimen. The specimen was set in the chamber with a relative humidity of 33％ in order to make the droplet dry into the layer. The CCD camera system was employed to observe the change in the shape of the droplet and in the specimen surface during the drying process. In addition, the surface potential measurement equipment was applied for monitoring the surface potential of the specimen with the layer. When the droplet of dilute solution became thin and saturated, pitting corrosion occurred and the surface potential rapidly lowered. By contrast, thick and saturated layer did not induce pitting corrosion and the surface potential indicated the relatively low and steady. Therefore, it was revealed that the atmospheric corrosion occurred on the steel under saturated MgCl 2 solution layer whose thickness less than 0.2 mm. ［doi:10.2320/jinstmet.JAW201607］

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