Effect of deformation on the electrochemical behavior of hot-dip galvanized steel sheets

Vagge, S.T.; Raja, V.S.; Narayanan, R. Ganesh

doi:10.1016/j.apsusc.2007.04.045

Cited by 36 publications

(17 citation statements)

References 12 publications

(19 reference statements)

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“…Zn and Zn-Mn DEPOSITION FROM IONIC LIQUID 1229 active coating dissolution, typical for zinc corrosion in NaCl solution. 25 The Tafel slope is ≈40 mV dec -1 , as usually reported for zinc dissolution. 26 Given this behaviour and diffusion-controlled cathodic reaction, the corrosion current densities were evaluated by extrapolation of the anodic Tafel lines to the corrosion potential, E corr , and the results are given in Table II.…”

Section: Corrosion Studysupporting

confidence: 52%

The importance of using hydrogen evolution inhibitor during the Zn and Zn-Mn electrodeposition from ethaline

Bučko¹,

Tomić

Maksimović

et al. 2019

JSCS

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Cyclic voltammetry was used for the characterization of zinc electrodeposition on steel from ethaline deep eutectic solution (1:2 choline chloride:ethylene glycol). The influence of 4-hydroxy-benzaldehyde (HBA) as an additive was analyzed. It was shown that hydrogen evolution is inhibited in the presence of HBA and further significantly retarded upon addition of Zn 2+ to the solution containing HBA. The cathodic peak for Zn 2+ reduction in this type of ionic liquid (ethaline+HBA+Zn 2+) resembles the zinc reduction in aqueous solution. The corrosion resistance of Zn coatings deposited at different current densities was evaluated by electrochemical methods, i.e., polarization measurements and electrochemical impedance spectroscopy in 3 % NaCl solution. The possibility of Zn-Mn alloy deposition from ethaline deep eutectic solvent was investigated for the first time. In addition, the corrosion stability of these alloy coatings was analyzed and compared to the stability of bare Zn coatings. It was shown that the optimum deposition current density for both Zn and Zn-Mn coatings with increased corrosion stability from ethaline + HBA electrolyte is 5 mA cm ˗2 .

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Section: Corrosion Studysupporting

confidence: 52%

The importance of using hydrogen evolution inhibitor during the Zn and Zn-Mn electrodeposition from ethaline

Bučko¹,

Tomić

Maksimović

et al. 2019

JSCS

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show abstract

“…The possible explanation for processing the electrochemical reaction is that the aggressive ion moves in the corrosive liquid through the pores and gaps within the coating and then electric reactions occur . Another reason is stress and microdeformation, which accelerates corrosion in general . In comparison with the results above, i g of aluminum alloy–Ti6Al4V couple increases rapidly from the beginning of the test after about 7 h. i g decreases suddenly, then increases slightly again.…”

Section: Resultsmentioning

confidence: 71%

Galvanic corrosion behaviour of hot-dipped zinc-aluminum alloy coated titanium-aluminum couples

Wang

Zhang

Wang

et al. 2013

Materials and Corrosion

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The hot-dipped zinc-aluminum alloy coating was used to avoid galvanic corrosion problems of titanium-aluminum alloy. The microstructure and corrosion properties of the coating were investigated by scanning electron microscopy, electrochemical measurement, and immersion test. The microstructure indicated that the coating consisted of outermost layer and middle interdiffusion layer, which metallurgically combined with the substrate. The electrochemical properties indicated that the coating on the titanium alloy decreased the electrochemical potential difference of galvanic couple. The corrosion current density showed that aluminum alloy contact with the coating changed the electrode, in other words, aluminum alloy specimen turned out to be the cathode in the galvanic couple. Immersion test was carried out to evaluate the performance of coating for galvanic corrosion, results confirmed that aluminum alloy contacted with coating on titanium-aluminum alloy exhibited less surface corrosion.

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“…Furthermore, the pre-electrodeposition of Cu afforded a typical anodic polarization behavior of galvanized coatings, i.e. a highly depolarized anodic reaction, 36 whereas a passive state emerged at −1.1-1.0 V SCE for the conventional galvanized coating. These phenomena can be explained in base of a rapid precipitation of corrosion products such as Zn(OH) 2 over the galvanized coating during the first 1 h of immersion, which results from the high corrosion rate observed for this material.…”

Section: Resultsmentioning

confidence: 99%

Improvement in Coating Quality and Corrosion Characteristics of Galvanized Steels by Pre-Electrodeposition of Cu

Choi¹,

Paik²,

Okido³

et al. 2012

J. Electrochem. Soc.

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A dual-phase steel was electrodeposited with Cu prior to reduction annealing in order to improve coating quality and resultant corrosion characteristics of the galvanized material. This pre-eletrodeposition process allowed a tenfold reduction in coating defects (typically found in uncoated areas and empty pores), thereby yielding a 8.4% coating weight gain and a noticeable decrease (24%) in the average spangle diameter. However, the Cu pre-electrodeposition layer acted as an inter-diffusion barrier, thereby limiting Fe-Al interactions during galvanization, and resulted in the formation of imperfect Fe-Al compounds. Nevertheless, this Cu layer could extend the incubation time of the Fe-Zn phases. Consequently, the presence of this Cu electrodeposition layer could effectively prevent concentration polarization, thereby decreasing corrosion current density even after 4 days of immersion in 3.5% NaCl solution.

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Effect of deformation on the electrochemical behavior of hot-dip galvanized steel sheets

Cited by 36 publications

References 12 publications

The importance of using hydrogen evolution inhibitor during the Zn and Zn-Mn electrodeposition from ethaline

The importance of using hydrogen evolution inhibitor during the Zn and Zn-Mn electrodeposition from ethaline

Galvanic corrosion behaviour of hot-dipped zinc-aluminum alloy coated titanium-aluminum couples

Improvement in Coating Quality and Corrosion Characteristics of Galvanized Steels by Pre-Electrodeposition of Cu

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