The mechanisms of corrosion inhibition of hot-dip galvanized steel by vanadyl oxalate: A galvanic corrosion investigation supported by XPS

Gao, Zhiqiang; Zhang, Dawei; Qiu, Xiaopan; Jiang, Sheming; Wu, Yucheng; Zhang, Qifu; Liu, Xiaogang

doi:10.1016/j.corsci.2018.07.024

Cited by 12 publications

(3 citation statements)

References 56 publications

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“…Meanwhile, vanadate conversion coatings have been widely applied on the surface of Zn or HGD steel for the sake of corrosion protection [ [56] , [57] , [58] ]. It is claimed that the corrosion inhibitory effect is possibly attributed to the existence of the +4/+5 mixed oxidation state of the conversion coatings [ 59 ]. Zou et al [ 16 ] constructed vanadium conversion coating, which is mainly composed of closely packed particles of V 2 O 5 , VO 2 and their hydrates on the surface of electrogalvanized steel.…”

Section: Brief Review On Industrial Zn Alloys and Their Surface Modification Methodsmentioning

confidence: 99%

A review on current research status of the surface modification of Zn-based biodegradable metals

Yuan

Xia

et al. 2022

Bioactive Materials

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Recently, zinc and its alloys have been proposed as promising candidates for biodegradable metals (BMs), owning to their preferable corrosion behavior and acceptable biocompatibility in cardiovascular, bone and gastrointestinal environments, together with Mg-based and Fe-based BMs. However, there is the desire for surface treatment for Zn-based BMs to better control their biodegradation behavior. Firstly, the implantation of some Zn-based BMs in cardiovascular environment exhibited intimal activation with mild inflammation. Secondly, for orthopedic applications, the biodegradation rates of Zn-based BMs are relatively slow, resulting in a long-term retention after fulfilling their mission. Meanwhile, excessive Zn 2+ release during degradation will cause in vitro cytotoxicity and in vivo delayed osseointegration. In this review, we firstly summarized the current surface modification methods of Zn-based alloys for the industrial applications. Then we comprehensively summarized the recent progress of biomedical bulk Zn-based BMs as well as the corresponding surface modification strategies. Last but not least, the future perspectives towards the design of surface bio-functionalized coatings on Zn-based BMs for orthopedic and cardiovascular applications were also briefly proposed.

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Section: Brief Review On Industrial Zn Alloys and Their Surface Modification Methodsmentioning

confidence: 99%

A review on current research status of the surface modification of Zn-based biodegradable metals

Yuan

Xia

et al. 2022

Bioactive Materials

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“…The aging of the coating is usually characterized by a loss of gloss, discoloration, pulverization, embrittlement, and cracking [11][12][13]. Three important material-related factors that determine the failure of the coating are water, oxygen, and corrosive ions [14][15][16]. From the point of view of the coating itself, it includes the corrosion resistance of the substrate in the coating,…”

Section: Introductionmentioning

confidence: 99%

Long-Term Atmospheric Aging and Corrosion of Epoxy Primer-Coated Aluminum Alloy in Coastal Environments

Zhang

et al. 2021

Coatings

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Aircraft are subjected to extreme weather conditions in coastal areas. This study reports long-term atmospheric exposure tests carried out on an epoxy primer-coated aluminum alloy in a coastal environment for 7, 12, and 20 years. The micromorphology and characteristics of the section and surface, the products of corrosion, electrochemical impedance, and molecular structure of the coated specimens were examined through a spectrophotometer, scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS), and X-ray photoelectron spectrometer (XPS). The results showed that the angles of contact of the specimens with different numbers of years of atmospheric exposure satisfied the normal distribution. Their fractal dimensions increased with an increase in the duration of exposure. Intergranular corrosion and exfoliation corrosion appeared in the specimens after 20 years, where the product of corrosion was Al(OH)3. The impedances and thermal properties of the epoxy coatings were influenced by the synergistic effects of aging and post-curing. The impedances of the coatings decreased greatly after long-term atmospheric exposure. After 20 years of corrosion, the specimen showed the characteristics of the substrate being corroded. The mechanism of corrosion and the electrochemical equivalent circuit were also analyzed.

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“…in order to homogenize the alloy surface and remove the loose oxide/hydroxide layer, the magnesium alloy was immersed in Cro 3 +hNo 3 solution before the electroless plating [8,9]. however, toxicity of the chromium compounds has persuaded the researchers to suggest several environmentally-friendly conversion coatings [10][11][12]. Despite the desirable results, the main drawback of these pretreatment layers is that the obtained nickel coating should be pore-free.…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

2021

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ElEctrolEss NickEl PlatiNg oN aM60B MagNEsiuM alloy via ti-Zr/sol-gEl coMPositE layEr as PrEtrEatMENtThe Ti-Zr and Ti-Zr/sol-gel were used as pretreatment layers before the electroless nickel coating on aM60b magnesium alloy. Scanning electron Microscopy was employed to investigate the surface morphology of the pretreated layers and applied electroless coatings. Chemical analysis of the Ti-Zr layer, and nickel coatings was done using the energy-Dispersive X-ray Spectroscopy. Moreover, the X-ray Diffraction and atomic force Microscopy methods were utilized to evaluate the microstructure and surface roughness of the electroless coatings, respectively. electrochemical impedance Spectroscopy was employed to study the corrosion behavior of Ni-P coatings. The results show that Ti-Zr layer has structural cracks, and the sol-gel film was covered all cracks entirely. The cauliflower-like electroless nickel coating was applied on both mentioned pretreated layers. The cross-sectional images revealed the higher thickness for the electroless coating on Ti-Zr/sol-gel layer, probably due to a large number of Ni nucleation centers. The eiS results demonstrate that the electroless coating on Ti-Zr/sol-gel has high corrosion protection and microhardness value.

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The mechanisms of corrosion inhibition of hot-dip galvanized steel by vanadyl oxalate: A galvanic corrosion investigation supported by XPS

Cited by 12 publications

References 56 publications

A review on current research status of the surface modification of Zn-based biodegradable metals

A review on current research status of the surface modification of Zn-based biodegradable metals

Long-Term Atmospheric Aging and Corrosion of Epoxy Primer-Coated Aluminum Alloy in Coastal Environments

Archives of Metallurgy and Materials

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