Corrosion studies on tailored Zn·Co aluminate/kaolin core–shell pigments in alkyd based paints

Ahmed, Nivin M.; Abdel-Fatah, Hesham T. M.; Youssef, E.A.M.

doi:10.1016/j.porgcoat.2011.09.003

Cited by 41 publications

(25 citation statements)

References 13 publications

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“…Especially, the hybrid pigments derived from the 1:1 style aluminosilicate clay minerals presented high CIE parameters. Due to the higher affinity of CoO to Al 2 O 3 than SiO 2 , and the CoO was easily arrived to the interphase of α-Al 2 O 3 originating from aluminosilicate clay mineral to generate CoAl 2 O 4 (Ahmed et al, 2012). For 2:1 style aluminosilicate clay minerals, the aluminosilicate clay minerals transformed into amorphous SiO 2 and α-Al 2 O 3 at high temperature, and the content of SiO 2 is much higher than that of α-Al 2 O 3 .…”

Section: Resultsmentioning

confidence: 99%

Formation and Coloring Mechanism of Typical Aluminosilicate Clay Minerals for CoAl2O4 Hybrid Pigment Preparation

Zhang

Wang

et al. 2018

Front. Chem.

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Different kinds of aluminosilicate minerals were employed to fabricate CoAl2O4 hybrid pigment for studying its formation and coloring mechanism. It revealed that the color of the obtained hybrid pigments was determined by the content of Al2O3 and lightness of clay minerals. The higher the Al2O3 content and the lightness of clay minerals, the better the color parameters of hybrid pigments. During the preparation of hybrid pigments, CoAl2O4 nanoparticles were confined to be loaded on the surface of the aluminosilicate minerals, which effectively prevented from the aggregation and the size increase of CoAl2O4 nanoparticles. What's more, aluminosilicate mineral might be an ideal natural aluminum source to compensate the aluminum loss due to the dissolution of Al(OH)3 at alkaline medium during precursor preparation, keeping an optimum molar ratio of Co2+/Al3+ for formation of spinel CoAl2O4 pigments in the process of high-temperature crystallization.

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Section: Resultsmentioning

confidence: 99%

Formation and Coloring Mechanism of Typical Aluminosilicate Clay Minerals for CoAl2O4 Hybrid Pigment Preparation

Zhang

Wang

et al. 2018

Front. Chem.

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“…However, the relevant application of some commercial available inorganic pigments is limited due to their disadvantages, such as poor adhesive force and optical transparency, weak abrasion and scratch resistance performance (Zhou et al, 2002; Cayton and Sawitowski, 2005; El-Wahab et al, 2009). Therefore, many attempts have been carried out to prepare high-performance pigments with good anticorrosion properties by designing lamellar-based nano-materials preventing water, oxygen, or ions from penetrating film (Kalendová et al, 2008; Ahmed et al, 2012; Ammar et al, 2016; Zhang et al, 2016). …”

Section: Introductionmentioning

confidence: 99%

“…Kaoline (Kaol) is a 1:1 type layered silicate mineral with one tetrahedral sheet of silica (SiO 4 ) linked through oxygen atoms to one octahedral sheet of alumina (AlO 6 ) octahedral (Liu et al, 2016; Kloprogge, 2017; Zhang S. L. et al, 2017). Owing to the advantages of excellent mechanical properties, thermal stability, high whiteness and unique flake-like morphology (Vesely et al, 2010; Ahmed et al, 2012; Qu et al, 2017), it is a promising candidate for preparation of cobalt blue hybrid pigment to design the color high-performance anticorrosion coating (Zhang et al, 2018a,b). However, the preparation process of co-precipitation usually involves in the discharge of the wastewater and lengthy steps including washing, solid-liquid separation and drying.…”

Section: Introductionmentioning

confidence: 99%

CoAl2O4/Kaoline Hybrid Pigment Prepared via Solid-Phase Method for Anticorrosion Application

Zhang

Wang

et al. 2018

Front. Chem.

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In this study, kaoline is incorporated to prepare CoAl2O4/kaoline hybrid pigments via traditional solid-state reaction, and the introduction of kaoline decreases the preparation temperature for formation of spinel CoAl2O4, and reduces the production cost of cobalt blue as well. More importantly, kaoline may participate in the crystallization of spinel CoAl2O4 during calcining process, and the hybrid pigments prepared using 8.1% Co3O4 and 81.5% kaoline features bright blue and good chemical resistance. Due to the synergistic effect between the sheet-like kaoline and the loaded CoAl2O4, the as-prepared CoAl2O4/kaoline hybrid pigments can be incorporated into epoxy paint system to obtain the high-performance blue anticorrosion coating, especially for acetic acid-salt fog corrosion.

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“…Typically, the core is formed by an inert filler (limestone, kaolin) or aluminum or glass flakes. The core functions as the support carrying the chemically active layers, e.g., oxides, which proactively prevent corrosion of the paint substrate (Ahmed, Abdel-Fatah, & Youssef, 2012;Ahmed & El-Nashar, 2013;El-Sabbagh, Ahmed, & Ward, 2012).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Me2 TiO4 and MeFe2 O4 spinels and their use in organic alkyd resin-based anticorrosion coatings

2014

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The anticorrosion properties of paints containing mixed metal oxide-based pigments were examined. Spinels with the cation combinations Ti-Zn-Mg or Fe-ZnMg were synthesized. Core-shell pigments with zinc oxide and magnesium oxide layers were also prepared. The pigments were synthesized from the oxides or carbonates by the high-temperature solid-phase process. The anticorrosion and physico-mechanical properties of film of paints based on an alkyd resin modified with soy oil and containing the pigments at a volume concentration of 10% were investigated. The highest anticorrosion efficiency was observed with the ferrite-based pigments. The anticorrosion efficiency was found to increase with increasing Zn contents of the pigments.

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Corrosion studies on tailored Zn·Co aluminate/kaolin core–shell pigments in alkyd based paints

Cited by 41 publications

References 13 publications

Formation and Coloring Mechanism of Typical Aluminosilicate Clay Minerals for CoAl2O4 Hybrid Pigment Preparation

Formation and Coloring Mechanism of Typical Aluminosilicate Clay Minerals for CoAl2O4 Hybrid Pigment Preparation

CoAl2O4/Kaoline Hybrid Pigment Prepared via Solid-Phase Method for Anticorrosion Application

Synthesis of Me2 TiO4 and MeFe2 O4 spinels and their use in organic alkyd resin-based anticorrosion coatings

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