Corrosion Behavior of Welded Joint of Q690 with CMT Twin

Liu, Peng; Han, Shanguo; Yi, Yaoyong; Yan, Cuixia

doi:10.1155/2018/2368717

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…The weld metal (WM) is mainly composed of non-uniform bainite and ferrite with coarse grains. There are signi cant differences in the grain size and microstructure in the different regions of the welded joint, which would result in the difference in the electrochemical activity between the different regions, and then initiating the galvanic effect between different regions [24,25] .…”

Section: Materials Preparationmentioning

confidence: 99%

Galvanic corrosion behavior of bainite weathering steel welded joint in simulated marine atmosphere environment based on capillary microcell

Huang,

Wang,

et al. 2023

Preprint

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The kinetical behavior and mechanism of micro-galvanic corrosion of Q690 bainitic weathering steel welded joint in marine atmosphere were investigated. The results showed that a micro-galvanic corrosion cell formed among different regions of the Q690 welded joint. The kinetical behavior of micro-galvanic corrosion could be divided into four stages: the initiation and development of micro-galvanic corrosion, the decreasing of galvanic corrosion rate, the polarity reversal of galvanic couple, and the disappearance of galvanic effect. The difference of corrosion rate between Q690 steel and its welded joint is closely related to the micro-galvanic corrosion kinetic behavior.

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Section: Materials Preparationmentioning

confidence: 99%

Galvanic corrosion behavior of bainite weathering steel welded joint in simulated marine atmosphere environment based on capillary microcell

Huang,

Wang,

et al. 2023

Preprint

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“…Most studies have shown that the inhomogeneity of the microstructure and chemical composition of welded joints are the primary reasons for a deteriorated corrosion resistance [6][7][8], which may cause localised corrosion, such as galvanic corrosion, stress corrosion and others [9][10][11][12]. The characteristics of localised corrosion include a high local corrosion rate, small structural loss rate and strong concealment, which can lead to the early catastrophic failure of engineered structures and generate huge economic losses.…”

Section: Introductionmentioning

confidence: 99%

The galvanic effect of high-strength weathering steel welded joints and its influence on corrosion resistance

Huang

Liu

et al. 2019

Corrosion Engineering, Science and Technology

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The influence of the galvanic effects on the welded joints of A710 high-strength weathering steel with two different weld metals (80Ni1-H4 and WER70) under a simulated marine atmospheric environment was investigated by employing Scanning Kelvin Probe (SKP), galvanic current measurements, cyclic wet/dry accelerated corrosion testing, Field-Emission Scanning Electron Microscopy (FE-SEM) and other approaches. The results indicate that the average galvanic currents for the HAZ-BM and HAZ-WM couples of the two welded joints initially decreased and then gradually stabilised, which is related to the formation of a stable rust layer. In addition, the WER70 welded joints presented a higher average corrosion rate than for the 80Ni1-H4 welded joints. The significant galvanic effect of the WER70 welded joints and the formation of a compact rust layer are the dominant effects during the initial and later corrosion stages, respectively.

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Role of Ni Content on Microstructure, Mechanical Property, and In‐Site Local Corrosion Behavior of Welded Joints Produced by Laser Welding of Dual‐Phase Steel

Zhai,

Liu,

et al. 2023

steel research int.

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In this study, the effects of Ni content on the microstructure, microhardness, and in‐site local corrosion behavior of laser‐welded joints in dual‐phase steel were investigated. The experimental results indicated that the microstructure of the fusion zone changed from martensite to austenite as the Ni content increased. The fusion zone (FZ) hardnesses of the 0Ni (no Ni foil addition) and 50Ni (50 μm Ni foil) welded joints were higher than that of the 100Ni (100 μm Ni foil) welded joints because of the austenite in the 100Ni welded joint. The welded joint without Ni showed severe pitting corrosion (more than 15 pitting sites in each zone of the welded joint) at the tested corrosion time. However, when immersed in the corrosion solution, the welded joints with added Ni exhibited slight pitting corrosion (less than 5 pitting sites). The Ni addition inhibited the pitting corrosion of the welded joints of high‐strength dual‐phase steel.This article is protected by copyright. All rights reserved.

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Corrosion Behavior of Welded Joint of Q690 with CMT Twin

Cited by 5 publications

References 23 publications

Galvanic corrosion behavior of bainite weathering steel welded joint in simulated marine atmosphere environment based on capillary microcell

Galvanic corrosion behavior of bainite weathering steel welded joint in simulated marine atmosphere environment based on capillary microcell

The galvanic effect of high-strength weathering steel welded joints and its influence on corrosion resistance

Role of Ni Content on Microstructure, Mechanical Property, and In‐Site Local Corrosion Behavior of Welded Joints Produced by Laser Welding of Dual‐Phase Steel

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