Electrochemical investigation on the hydrogen permeation behavior of 7075-T6 Al alloy and its influence on stress corrosion cracking

Zheng, Chuanbo; Yan, Bing-hao; Zhang, Ke; Guo, Yi

doi:10.1007/s12613-015-1128-5

Cited by 23 publications

(10 citation statements)

References 32 publications

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“…They are widely used in the manufacturing fields of medical devices, as well as the aerospace and automobile industries, among others. However, the poor corrosion resistance of aluminum alloy, especially the inter-granular corrosion and pitting caused by intermetallic compound particles, greatly limits its further application [5,6]. Therefore, it is necessary to improve corrosion resistance and surface properties of aluminum alloys by surface modification.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Self-Cleaning Superhydrophobic Surfaces with Improved Corrosion Resistance on 6061 Aluminum Alloys

Dong

Meng

et al. 2020

Micromachines

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Aluminum alloys are widely used, but they are prone to contamination or damage under harsh working environments. In this paper, a self-cleaning superhydrophobic aluminum alloy surface with good corrosion resistance was successfully fabricated via the combination of sand peening and electrochemical oxidation, and it was subsequently covered with a fluoroalkylsilane (FAS) film. The surface morphology, surface wettability, and corrosion resistance were investigated using a scanning electron microscope (SEM), an optical contact angle measurement, and an electrochemical workstation. The results show that binary rough structures and an FAS film with a low surface energy on the Al alloy surfaces confer good superhydrophobicity with a water contact angle of 167.5 ± 1.1 • and a sliding angle of 2.5 ± 0.7 • . Meanwhile, the potentiodynamic polarization curve shows that the corrosion potential has a positively shifted trend, and the corrosion current density decreases by three orders of magnitude compared with that of the original aluminum alloy sample. In addition, the chemical stability of the as-prepared superhydrophobic surface was evaluated by dripping test using solutions with different pH values for different immersion time. It indicates that the superhydrophobic surface could provide long-term corrosion protection for aluminum alloys. Consequently, the as-prepared superhydrophobic surface has excellent contamination resistance and self-cleaning efficacy, which are important for practical applications.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Self-Cleaning Superhydrophobic Surfaces with Improved Corrosion Resistance on 6061 Aluminum Alloys

Dong

Meng

et al. 2020

Micromachines

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“…27 The adsorption area decreases after the additions of molybdate, due to the adsorption of molybdate onto the metal surface. Moreover, hydrogen atoms are consumed through reactions (1), (2) and (3). Hydrogen atoms adsorbed on the metal surface decrease.…”

Section: Discussionmentioning

confidence: 99%

“…The role of molybdate as an inhibitor that improves the pitting-corrosion resistance has been studied for several decades. [1][2][3][4][5] S. A. M. Refaey et al 1,2 found that inorganic molybdate prevented pitting corrosion in both sodium chloride and an acidified solution by increasing the pitting potential. The inhibition of the pit nucleation and growth on the passive surface of pure iron was studied by E. Fujioka.…”

Section: Introductionmentioning

confidence: 99%

“…5 In summary, there are reports on the effects of molybdates on the pitting and SCC behaviour of steels in chloride solutions. [1][2][3][4][5][6][7][8][9][10][11][12] The majority of these reports suggested the use of the inhibiting effects of molybdates on stainless-steel pitting. However, all these studies ignore the effect of molybdates on hydrogen permeation.…”

Section: Introductionmentioning

confidence: 99%

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Effect of molybdate on the stress corrosion cracking of 2205 duplex stainless steel in sulfuric acid solution

Yi¹,

Xing²,

Qi³

et al. 2019

Mater. Tehnol.

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The inhibition effect of molybdate on stress corrosion cracking (SCC) was investigated by many researchers, but few considered the molybdate effect on hydrogen permeation and the relationship between SCC and hydrogen permeation. This paper presents the effect of molybdate on SCC susceptibility and hydrogen permeation through the 2205 super duplex stainless steel in a sulfuric acid solution. An addition of molybdate has an interesting influence. It decreases the SCC susceptibility. With its increasing concentration, the inhibition effect on the hydrogen permeation remains steady. Attempts were made to understand this behaviour based on the role of molybdate in hydrogen permeation and pitting characteristics of the 2205 stainless steel in a sulfuric acid solution.

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“…The effect of the plasma treatment on the failure process of alkyd-varnish coatings (AVCs) with defects under deep-ocean conditions was investigated. EIS [16][17][18][19] and SKP [20][21][22][23][24] were used as electrochemical macroscopic and microscopic characterization methods, respectively. The depth-from-defocus method was also applied as an intuitive approach to observing the changes in the defects and the coating.…”

Section: Introductionmentioning

confidence: 99%

EIS and SKP study on improvement of the protection performance of an alkyd-varnish coating modified with air-plasma treatment on Q235 steel

Zheng¹,

Qu²,

Wang³

2017

Mater. Tehnol.

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Electrochemical impedance spectroscopy (EIS) and scanning Kelvin probe (SKP) were used to study the failure of the coating modified with air-plasma treatment in 3.5 % mass fraction of NaCl. The results show that the failure process can be divided into three stages including water penetration, accumulation of corrosion products at the location of a defect, water penetration of the entire coating and coating failure. The EIS results show that the plasma-treated samples exhibit an additional electrical double-layer capacitor that delays the coating failure during the second stage. The potential of the non-plasma-treated samples decrease faster than that of the plasma-treated samples according to the SKP study. As the transition layer, air plasma delays the coating failure due to the chemical bond between the metal substrate and the coating. Keywords: air-plasma treatment, electrochemical impedance spectroscopy, scanning Kelvin probe, coating failure, hydrostatic pressure Elektrokemijsko impedan~no spektroskopijo (angl. EIS) in vrsti~no Kelvinovo sondo (SKP) smo uporabili za preu~evanje po{kodb na prevleki, modificirani s plazmo, v 3,5 mas. % raztopini NaCl. Rezultati ka`ejo, da se nastajanje po{kodb lahko razdeli na tri faze, vklju~no s penetracijo vode: na akumulacijo korozijskih produktov na mestu napake, na prodiranje vode v dele celotne prevleke in na odpoved prevleke. Rezultati EIS ka`ejo, da imajo vzorci, obdelani v plazmi, dodaten elektri~ni dvoslojni kondenzator, ki v drugi fazi upo~asni po{kodbo prevleke (premaza). SKP-analize so pokazale, da se potencial plazemsko neobdelanih vzorcev zmanj{uje hitreje kot tistih vzorcev, ki so bili obdelani s plazmo. Kot prehodna plast, obdelava z zra~no plazmo upo~asni po{kodbo premaza zaradi kemijske vezi med kovinskim substratom in prevleko. Klju~ne besede: obdelava s plazmo, elektrokemijska impedan~na spektroskopija, skeniranje s sondo Kelvin, odpoved prevleke, hidrostati~ni tlak

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Electrochemical investigation on the hydrogen permeation behavior of 7075-T6 Al alloy and its influence on stress corrosion cracking

Cited by 23 publications

References 32 publications

Fabrication of Self-Cleaning Superhydrophobic Surfaces with Improved Corrosion Resistance on 6061 Aluminum Alloys

Fabrication of Self-Cleaning Superhydrophobic Surfaces with Improved Corrosion Resistance on 6061 Aluminum Alloys

Effect of molybdate on the stress corrosion cracking of 2205 duplex stainless steel in sulfuric acid solution

EIS and SKP study on improvement of the protection performance of an alkyd-varnish coating modified with air-plasma treatment on Q235 steel

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