Galvanic corrosion of metal/ceramic coupling

Schneider, Michael; Kremmer, K.; Lämmel, C.; Sempf, Kerstin; Herrmann, Matthias

doi:10.1016/j.corsci.2013.11.024

Cited by 76 publications

(29 citation statements)

References 30 publications

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“…This result suggests that the Al matrix and B 4 C particles in the composite can form galvanic couples in NaCl solution, and the Al matrix acts as an anode and dissolves. A similar result was obtained by Schneider et al [37], when they studied the galvanic corrosion between pure Nickel and sintered SiC in 3.5 wt.% NaCl solution, i.e. , SiC ceramic particles are cathodic sites of the coupling.…”

Section: Resultssupporting

confidence: 85%

Electrochemical Behavior of Al-B4C Metal Matrix Composites in NaCl Solution

Han

Chen

2015

Materials

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Aluminum based metal matrix composites (MMCs) have received considerable attention in the automotive, aerospace and nuclear industries. One of the main challenges using Al-based MMCs is the influence of the reinforcement particles on the corrosion resistance. In the present study, the corrosion behavior of Al-B4C MMCs in a 3.5 wt.% NaCl solution were investigated using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques. Results indicated that the corrosion resistance of the composites decreased when increasing the B4C volume fraction. Al-B4C composite was susceptible to pitting corrosion and two types of pits were observed on the composite surface. The corrosion mechanism of the composite in the NaCl solution was primarily controlled by oxygen diffusion in the solution. In addition, the galvanic couples that formed between Al matrix and B4C particles could also be responsible for the lower corrosion resistance of the composites.

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Section: Resultssupporting

confidence: 85%

Electrochemical Behavior of Al-B4C Metal Matrix Composites in NaCl Solution

Han

Chen

2015

Materials

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“…CFRP has the highest self‐corrosion potential (−0.15 V), and 5083P‐O Al has a lower self‐corrosion potential (−0.8 V). According to Schneider et al, if the potential difference between two materials is higher than 0.05 V, the effect of galvanic corrosion should not be neglected. In this study, the potential difference between CFRP and 5083P‐O Al can reach 0.65 V, which means that when the CFRP is in contact with the Al the galvanic corrosion effect will be very serious.…”

Section: Resultsmentioning

confidence: 99%

Effect of anodizing on galvanic corrosion behavior of T300 CFRP/5083P‐O Al bolted joints

Shan

Guo

Gou

et al. 2019

Materials & Corrosion

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T300 carbon fiber reinforced polymer (CFRP) and 5083P‐O aluminum (5083P‐O Al) alloy bolted joints have been used in high‐speed trains due to the advantages of light weight and high strength. However, high potential difference between the CFRP and 5083P‐O Al will induce galvanic corrosion and result in accelerating corrosion rate of 5083P‐O Al, which is a potential risk for its engineering applications. In this work, combination with the electrochemical analysis, surface and cross‐section corrosive morphologies analysis, the galvanic corrosion behavior between CFRP/5083P‐O Al bolted joints with and without anodizing in 3.5 wt.% NaCl spray was investigated. Results indicated that severe corrosion occurred on unanodized 5083P‐O Al in the coupled regions of the CFRP/5083P‐O Al bolted joint due to galvanic corrosion. With the content of sulfuric acid increasing, the thickness of each Al2O3 layer and atomic oxygen content increases significantly. 5083P‐O Al anodized by the 135 g/L H2SO4 + 8 g/L H3BO3 mixed solution had the favorable Al2O3 film, which increased the resistance of 5083P‐O Al by roughly three orders of magnitude, effectively improving the corrosion resistance of 5083P‐O Al.

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“…On the other hand, it was reported that the round pits with a diameter of 90 µm were concentrated on the RS of the FSP250. This is because there was more Cr tied up in the undissolved carbides at the RS where it was more anodic and selectively attacked [42]. The typical pit morphology of the multi-pass specimens was quite different from that of FSP250, as shown in Figure 11.…”

Section: Specimenmentioning

confidence: 94%

Effect of Multiple-Pass Friction Stir Processing on Hardness and Corrosion Resistance of Martensitic Stainless Steel

Pan¹,

Kwok²,

Lo³

2019

Coatings

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In the present study, the influence of multi-pass friction stir processing (FSP) of AISI 420 martensitic stainless steel on the microstructure, hardness, and corrosion behavior was investigated. Similar to single-pass FSPed 420, the multi-pass FSPed specimens with different overlapping ratios incurred microstructural change at the center and retreating side of the second track with martensite, retained austenite, and chromium carbides. Overlapping of the two successive tracks in the multi-pass FSPed 420 led to back-tempering and a local drop in hardness at the advancing side of the second track. The precipitation of chromium carbides in the tempered regions of the multi-pass FSPed specimens became the active sites for preferential corrosion attack in the 3.5 wt.% NaCl solution at 25 °C.

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Galvanic corrosion of metal/ceramic coupling

Cited by 76 publications

References 30 publications

Electrochemical Behavior of Al-B4C Metal Matrix Composites in NaCl Solution

Electrochemical Behavior of Al-B4C Metal Matrix Composites in NaCl Solution

Effect of anodizing on galvanic corrosion behavior of T300 CFRP/5083P‐O Al bolted joints

Effect of Multiple-Pass Friction Stir Processing on Hardness and Corrosion Resistance of Martensitic Stainless Steel

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