Influence of 8-hydroxyquinoline on properties of anodic coatings obtained by micro arc oxidation on AZ91 magnesium alloys

Zhang, R.F.; Zhang, S.F.; Yang, Nan; Yao, Lei; He, Fang; Zhou, Yu; Xu, Xiang; Chang, Linrong; Bai, Shoujun

doi:10.1016/j.jallcom.2012.04.120

Cited by 49 publications

(17 citation statements)

References 36 publications

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“…In situ addition of organic/inorganic substances into the PEO bath has been carried out in many scientific works, but their impact on corrosion behavior can be primarily due to their influence on PEO coatings morphology rather than their inhibitive characteristics themselves [ 234 , 235 , 236 , 237 , 238 ]. For instance, the addition of 2 g/L of 8HQ in a PEO bath, containing NaOH and Na 2 SO 4 , results in better uniformity of pores, with a lower number of pores per area in the PEO coating on AZ91 ( Figure 20 a,b).…”

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

“…Some leaf-like particles also appears (indicated with arrows in Figure 20 b) with the addition of 8HQ. However, a further increase in 8HQ concentration results in more heterogeneous morphology, with some regions porous and others compact ( Figure 20 c,d) [ 234 ]. A comprehensive review of the effects of organic/inorganic additives to the PEO electrolytes for Mg alloys has been provided in PART II of this review [ 9 ].…”

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

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Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

et al. 2022

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Owing to the unique active corrosion protection characteristic of hexavalent chromium-based systems, they have been projected to be highly effective solutions against the corrosion of many engineering metals. However, hexavalent chromium, rendered a highly toxic and carcinogenic substance, is being phased out of industrial applications. Thus, over the past few years, extensive and concerted efforts have been made to develop environmentally friendly alternative technologies with comparable or better corrosion protection performance to that of hexavalent chromium-based technologies. The introduction of corrosion inhibitors to a coating system on magnesium surface is a cost-effective approach not only for improving the overall corrosion protection performance, but also for imparting active inhibition during the service life of the magnesium part. Therefore, in an attempt to resemble the unique active corrosion protection characteristic of the hexavalent chromium-based systems, the incorporation of inhibitors to barrier coatings on magnesium alloys has been extensively investigated. In Part III of the Review, several types of corrosion inhibitors for magnesium and its alloys are reviewed. A discussion of the state-of-the-art inhibitor systems, such as iron-binding inhibitors and inhibitor mixtures, is presented, and perspective directions of research are outlined, including in silico or computational screening of corrosion inhibitors. Finally, the combination of corrosion inhibitors with other corrosion protection strategies is reviewed. Several reported highly protective coatings with active inhibition capabilities stemming from the on-demand activation of incorporated inhibitors can be considered a promising replacement for hexavalent chromium-based technologies, as long as their deployment is adequately addressed.

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Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

et al. 2022

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“…The ability of 8-HQ to form a stable complex of Mg(HQ) 2 with Mg 2+ ions was exploited by several research groups to design a new electrolyte system for PEO coatings. According to Zhang et al [104], a series of PEO coatings was prepared on AZ91 Mg alloy by utilizing an alkaline-silicate electrolyte without and with the addition of various concentrations 8-HQ, such as 2, 5, and 8 g/L. The current density, frequency, duty cycle, and coating time during PEO treatments were adjusted to be 40 mA/cm 2 , 2000 Hz, 20%, and 3 min, respectively.…”

Section: Aromatic Compoundsmentioning

confidence: 99%

“…The current density, frequency, duty cycle, and coating time during PEO treatments were adjusted to be 40 mA/cm 2 , 2000 Hz, 20%, and 3 min, respectively. The addition of 8HQ into silicate solution during PEO decreased the electrolyte conductivity and promoted coating formation [104]. The addition of this additive to the PEO electrolyte led to the formation of insoluble Mg(HQ) 2 and a decrease in pore size.…”

Section: Aromatic Compoundsmentioning

confidence: 99%

Optimization of Surface Properties of Plasma Electrolytic Oxidation Coating by Organic Additives: A Review

Kaseem

Dikici

2021

Coatings

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Plasma electrolytic oxidation (PEO) is an effective surface modification method for producing ceramic oxide layers on metals and their alloys. Although inorganic electrolytes are widely used in PEO, the organic additives have received considerable interest in the last decade due to their roles in improving the final voltage and controlling spark discharging, which lead to significant improvements in the performance of the obtained coatings. Therefore, this review summarized recent progress in the impacts of organic additives on the electrical response and the plasma discharges behavior during the PEO process. The detailed influence of organic additives, namely alcohols, organic acids, organic amines, organic acid salts, carbohydrate compounds, and surfactants on the corrosion behavior of PEO coatings is outlined. Finally, the future aspects and challenges that limit the industrial applications of PEO coating made in organic electrolytes are also highlighted.

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“…It is frequently used in synthesis of a variety of compounds, which are useful for chemical, biological, and industrial purposes. Oxine derivatives have been reported as a corrosion inhibitor, in manufacturing dyes and to detect metals . Its 8‐hydroxyquinolinato‐bis‐salicylato yttrium (III) complexes inhibits growth of Schizosaccharomyces pombe , whereas lanthanide (III) complexes of 8‐quinolinol Schiff bases are antioxidant and have the ability to bind DNA .…”

Section: Introductionmentioning

confidence: 99%

NMR study of O and N, O‐substituted 8‐quinolinol derivatives

Mastoor

Faizi

Saleem

et al. 2013

Magnetic Reson in Chemistry

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The (1)H and (13)C NMR spectral study of several biologically active derivatives of 8-quinolinol have been made through extensive NMR studies including homodecoupling and 2D-NMR experiments such as COSY-45°, NOESY, and HeteroCOSY. Electron donating resonance and electron withdrawing inductive effect of several groups showed marked changes in chemical shifts of nuclei at the seventh positions of O-substituted quinolinols (2-15). Although in N-alkyl, 8-alkoxyquinolinium halides (16-21), ring A rightly showed low frequency chemical shift values.

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Influence of 8-hydroxyquinoline on properties of anodic coatings obtained by micro arc oxidation on AZ91 magnesium alloys

Cited by 49 publications

References 36 publications

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

Optimization of Surface Properties of Plasma Electrolytic Oxidation Coating by Organic Additives: A Review

NMR study of O and N, O‐substituted 8‐quinolinol derivatives

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