Galvanic corrosion associated with SM 80SS steel and Ni-based alloy G3 couples in NaCl solution

Yin, Z. F.; Yan, Maocheng; Bai, Zhen Quan; Zhao, Wanhua; Zhou, Wentao

doi:10.1016/j.electacta.2008.04.029

Cited by 61 publications

(21 citation statements)

References 6 publications

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“…In Figure 13 a the galvanic current density of the Ti-Ci bimetal in 3.5% wt NaCl solution is plotted for three replicates. Based on these galvanic current curves, negative galvanic current values (below the zero dashed line in the inset) indicate the net flow of electrons from Ti (as anode) to Cu (as cathode) [ 52 , 53 ] in the galvanic couple. Similarly, positive galvanic current values (above the zero dashed line in the inset) reflect the net flow of electrons from Cu (as anode) to Ti (as cathode).…”

Section: Resultsmentioning

confidence: 99%

Insights into Galvanic Corrosion Behavior of Ti-Cu Dissimilar Joint: Effect of Microstructure and Volta Potential

et al. 2018

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The effect of microstructure on corrosion behavior of a solid-state explosion welded Ti-Cu bimetal is investigated by means of alternating current-direct current (AC-DC) electrochemical measurements, optical microscopy, scanning electron microscopy, and scanning Kelvin probe force microscopy (SKPFM). The results indicate that the titanium regions in the welding interface, local melted zone (LMZ), and LMZ-Cu interface are potential sites for initiation of corrosion attacks. SKPFM mapping clearly shows that before exposure of the sample to a 3.5% NaCl corrosive solution and at the beginning of the exposure, the Cu side of the bimetal has a higher Volta potential in comparison to that of the Ti region, and thus acts as a cathode. Electrochemical measurements also confirm that titanium acts as an anode and copper as a cathode, in the first moments of immersion, in accordance with macroscopic observations and SKPFM results. However, by growing a passive layer of titanium oxide and titanium hydroxide on the Ti side after about 1 h exposure to the corrosive medium, the titanium side becomes nobler and the polarity arrangement in the galvanic couple reverses.

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Section: Resultsmentioning

confidence: 99%

Insights into Galvanic Corrosion Behavior of Ti-Cu Dissimilar Joint: Effect of Microstructure and Volta Potential

et al. 2018

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“…These uncoated contact structures may cause severe galvanic corrosion while they are exposed to corrosive atmospheres . Galvanic corrosion is affected by multiple factors, including the area ratio of the cathode/anode, the coupled distance, temperature, electrolyte concentration, and the flow rate of the medium . These influential factors do not exist in isolation, rather they interact and have a broad impact on corrosion characteristics; any change in the above‐mentioned factors may cause the corrosion characteristics to alter profoundly.…”

Section: Introductionmentioning

confidence: 99%

Anode characteristics of Al/Ti galvanic couple in a salt spray environment

Zou

Zhou

et al. 2019

Materials & Corrosion

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The galvanic corrosion behavior of a 2A12 aluminum alloy and a Ti-15-3 titanium alloy in a salt spray environment was investigated. The results indicated that the galvanic effect accelerated the dissolution rate of the anodes significantly; however, the corrosion of the anode was not uniform. The region adjacent to the coupled joint experienced the most significant corrosion, with galvanic corrosive action emerging as dominant. The corrosion of the region distant from the joint was slight and was dominated by the self-corrosion process. A new model for the current difference distribution of the galvanic couple was established to illuminate the nonuniform corrosion phenomenon of the anode. K E Y W O R D S aluminum alloy, anode characteristics, galvanic corrosion, salt spray environment

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“…Galvanic corrosion is an enhanced corrosion between two or more kinds of electrically connected metals [ 10 ] in which the more active metal acts as the anode, and the less active metal is the cathode [ 11 ]. Galvanic corrosion is common in municipal infrastructure and industry [ 12 ] and is a common research topic.…”

Section: Introductionmentioning

confidence: 99%

Mapping the Galvanic Corrosion of Three Metals Coupled with a Wire Beam Electrode: The Influence of Temperature and Relative Geometrical Position

et al. 2018

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The local electrochemical properties of galvanic corrosion for three coupled metals in a desalination plant were investigated with three wire-beam electrodes as wire sensors: aluminum brass (HAl77-2), titanium (TA2), and 316L stainless steel (316L SS). These electrodes were used with artificial seawater at different temperatures. The potential and current–density distributions of the three-metal coupled system are inhomogeneous. The HAl77-2 wire anodes were corroded in the three-metal coupled system. The TA2 wires acted as cathodes and were protected; the 316L SS wires acted as secondary cathodes. The temperature and electrode arrangement have important effects on the galvanic corrosion of the three-metal coupled system. The corrosion current of the HAl77-2 increased with temperature indicating enhanced anode corrosion at higher temperature. In addition, the corrosion of HAl77-2 was more significant when the HAl77-2 wires were located in the middle of the coupled system than with the other two metal arrangement styles.

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Galvanic corrosion associated with SM 80SS steel and Ni-based alloy G3 couples in NaCl solution

Cited by 61 publications

References 6 publications

Insights into Galvanic Corrosion Behavior of Ti-Cu Dissimilar Joint: Effect of Microstructure and Volta Potential

Insights into Galvanic Corrosion Behavior of Ti-Cu Dissimilar Joint: Effect of Microstructure and Volta Potential

Anode characteristics of Al/Ti galvanic couple in a salt spray environment

Mapping the Galvanic Corrosion of Three Metals Coupled with a Wire Beam Electrode: The Influence of Temperature and Relative Geometrical Position

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