Performance of phosphate–alumina pigments in waterborne paints for protection of cold-rolled steel

Ahmed, Nivin M.; Mohamed, Heba A.

doi:10.1007/s11998-010-9288-8

Cited by 7 publications

(6 citation statements)

References 25 publications

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“…Generally, electrochemical studies were in high accordance with accelerated laboratory test results which revealed that group IV was the best and paint films containing TiO 2 /SiO 2 (3) showed the best corrosion inhibition behaviour among all paint films of the groups.…”

Section: Groupsupporting

confidence: 70%

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Study on the Anticorrosive Behavior of New Hygiene Structured Pigment Based on Waste Core and Nano Shell in Alkyd Paints

Ahmed¹,

Abdel-Fatah²

2014

Developments in Corrosion Protection

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All the employed pigments, extenders, resins, solvents, additives and chemicals were products of different local and international companies. Silica fume waste was obtained from ferrosilicon factories in Aswan, Egypt. Its chemical composition is represented in Table (1), the waste was collected from the chimneys of the factory and this may be the cause of its gray color as it contains a very high percentage of carbon resulting from the smelting of this alloy preparation. Concentration of main constituents Wt., % SiO 2 97.98 Al 2 O 3 0.39 Fe 2 O 3 Total 1.04 MnO 0.08 CuO 0.02 MgO 0.83 CaO 0.32 SrO 0.003 Na 2 O 0.53 K 2 O 0.75 P 2 O 5 0.07 SO 3 0.005 L.O.I 4.93 Table 1. Chemical composition of silica fume Study on the Anticorrosive Behavior of New Hygiene Structured Pigment Based on... 3

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Section: Groupsupporting

confidence: 70%

“…The presence of shell can alter some properties of core like surface charge, functionality and reactivity. These new core-shell particles are widely applied in different applications [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Study on the Anticorrosive Behavior of New Hygiene Structured Pigment Based on Waste Core and Nano Shell in Alkyd Paints

Ahmed¹,

Abdel-Fatah²

2014

Developments in Corrosion Protection

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“…These modifications have led to better water solubility, good corrosion protection in addition to being eco-friendly (Naderi et al , 2014). Core-shell method is introduced for the preparation of new advanced materials (Ahmed, 2009; Ahmed and Mohamed, 2011). Core-shell materials were promoted with the idea of gathering two components in one compound to help in overcoming the defects of the individual components by gaining new properties and gathering the properties of both components, so that they can offer different new possibilities and innumerable combinations.…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection performance of silica fume waste-phosphates core-shell pigments

Ahmed

Mohamed

El-Gawad

2018

PRT

Self Cite

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Purpose New types of phosphate pigments which are appropriate alternatives for hazardous chromate pigments have been prepared and evaluated. These new pigments were prepared via a new technique named core-shell. The core-shell materials consist of at least two separate phases with different chemical compositions. Recently, these materials have become more significant because they have the advantage of gathering the properties of both cores and shells that help to overcome the defects that they might possess individually. The purpose of this research is to develop a modified silica fume-phosphate core-shell pigment that contains 80-90 per cent of waste material (silica fume) and at the same time can offer promoted mechanical and anticorrosive properties than silica fume and they can also be compared with phosphates. The pigments have shells of Zn, Mn, Zn.Mn phosphates comprising about 10-20 per cent. Design/methodology/approach The prepared core-shell pigments have been characterized using several methods, which have then been integrated in alkyd paint formulations. The physical and mechanical properties of dry films and their corrosion prevention using accelerated laboratory test in 3.5 per cent NaCl for 28 days are estimated. Findings This study showed that the performance of these new pigments is highly efficient in corrosion protection, and it can be a suitable alternative to phosphate pigments despite containing phosphates which does not exceed 20 per cent of the composition. Practical implications Waste materials were reused in paints and only simple modification was used; their effectiveness was high and can be compared with well-known pigments. Originality/value Silica-phosphate core-shell pigments are environmentally friendly pigments that can replace other hazardous pigments (e.g. chromates and phosphates) with almost the same quality in their performance.

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“…The core-shell theory is a new way of obtaining high performance, and eco-friendly extender pigments that are cost-effective. In this theory, a cheap extender being the core is covered by a surface layer of very efficient and expensive pigment-the shell [2]. Core-shell particles are examples of nanostructured materials with functional properties such as composite materials where the morphology, microstructure and chemical composition are controlled to achieve various functional properties [3].…”

Section: Introductionmentioning

confidence: 99%

“…Most of these methods are difficult to replicate in commercial quantity because of the multiple steps, pH control, ingredients like surfactant polyelectrolytes and cutting-edge technologies required [3]. Many literature sources have revealed excellent report on the preparation of core-shell extender pigments [2] [18].…”

Section: Introductionmentioning

confidence: 99%

Performance of Local Clay-Titanium Dioxide Core-Shell Extender Pigments in Alkyd Paints

Ewulonu

Igwe

Onyeagoro

2016

ANP

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The performance of local clay-titanium dioxide core-shell extender pigments in alkyd paints has been studied. The physico-mechanical properties of the prepared alkyd paints were evaluated according to ASTM measurements. The effects of various environmental and corrosive factors on the paints were also studied. The study showed that the alkyd paint samples formulated using the core-shell pigments generally had low specific gravity (1.30 -1.38), an indication that more of the core-shell pigments can be incorporated into the alkyd paints with considerable cost savings. The dry film thicknesses of the paint samples falls within 0.24 -0.39 mm, suggesting that the samples will perform well as anticorrosive coatings and their adhesion properties are generally good, showing that they can withstand abrasive and corrosive agents. The core-shell extender pigments formulated paint samples were observed to exhibit the best dust-free, tack-free, and through dry times compared to TiO2 paint formulation. The formulated paint samples generally performed well on exposure to rain and sunlight as well as in distilled water, 2% Na 2 CO 3 , and 2% H 2 SO 4 with only TiO 2 paint formulation exhibiting rust. The good paint performance characteristics obtainable with the core-shell extender pigments are enough evidence to justify their utilization in the surface coatings industry. The performances of these core-shell extender pigments in alkyd paints have shown that they combine the properties of both the clays and titanium dioxide, and have the potential to overcome their disadvantages.

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Performance of phosphate–alumina pigments in waterborne paints for protection of cold-rolled steel

Cited by 7 publications

References 25 publications

Study on the Anticorrosive Behavior of New Hygiene Structured Pigment Based on Waste Core and Nano Shell in Alkyd Paints

Study on the Anticorrosive Behavior of New Hygiene Structured Pigment Based on Waste Core and Nano Shell in Alkyd Paints

Corrosion protection performance of silica fume waste-phosphates core-shell pigments

Performance of Local Clay-Titanium Dioxide Core-Shell Extender Pigments in Alkyd Paints

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