نتایج جستجو برای: clay and calcite coating

تعداد نتایج: 16841731  

2016
Brandon Chase Brandon Franklin

With a shift to exploiting unconventional petroleum plays in the United States to support energy consumption, understanding the nanopore systems in those unconventional resources becomes important for future exploitation. The goal of this study is to characterize the pore systems of the Cretaceous Lincoln Limestone found in the Denver-Julesburg (DJ) Basin in order to test the hypothesis that li...

2006
R. N. Guillemette

Accretionary carbonate spherules of small size are a common component of distal Chicxulub impact ejecta deposits and are documented at Brazos River, Texas, and Bass River, New Jersey, located about 1000 km and 2500 km respectively from the crater. This spherule type is also present in northeast Mexico and is related to accretionary carbonate lapilli present in proximal Chicxulub ejecta deposits...

2010
Roman E. Popil

Modified fillers consisting of kaolin particles encapsulated by starch have recently been demonstrated in mill trials to achieve significant filler loading levels without accompanying strength losses. In this work, laboratory experiments were conducted to explore the potential advantages of using starch-treated pigment for strength increases by application of surface coating. It is found that a...

The corrosion protection of mild steel by a newly developed epoxy-based coating system containing inherently conducting nanopolyaniline-clay as a nanoadditive has been studied. Polyaniline-clay anticorrosion nanoadditive (PCNA) was obtained by the direct mixing method of nanopolyaniline (0.03 wt.%) and organo-modified clay (3 wt.%) at atmospheric pressure, and XRD technique was used to study d-...

Journal: :international journal of nanoscience and nanotechnology 2010
d. zaarei a. a. sarabi* f. sharif s. m. kassiriha m. moazzami gudarzi

polymer-clay nanocomposite coatings have attracted much attention because of impressive enhancements of coating properties. in this research, both commercially available and isophoronediamine-modified montmorillonite clays were used to obtain epoxy-clay nanocomposite coatings. these nanocomposite materials with different clay loadings in the form of coatings were applied to cold-rolled steel (c...

2007
P. J. Bouza H. del Valle M. Rostagno

Recent studies of soil–landscape relationships in northeastern Patagonia identified fibrous-clay minerals in calcic and petrocalcic horizons developed on old fluvio-glacial plains called “Rodados Patagónicos” (RP). The objectives of this study were: i) to evaluate the occurrence of fibrous-clay minerals in the arid soil environment, and ii) to establish the relationship between the soil propert...

2016
Elena L. Nikonova ELENA L. NIKONOVA Elena L Nikonova Daniel M. Deocampo Robert B. Simmons

The purpose of this study is to understand mineral diagenesis authigenic mineral and the effect of climate on mineral of Pleistocene-Holocene sediment deposits in the Southern Kenya Rift. Lake Magadi unique geologic settings are characterized by extreme alkalinity and high silica activities. The mineralogical analysis was achieved by X-Ray diffraction (XRD) and Scanning Electron Microscopy (SEM...

Journal: :iranian journal of oil & gas science and technology 2015
hamid reza zamanizadeh mohammad reza shishesaz iman danaee davood zaarei

in this study, the corrosion resistance of a bituminous coating reinforced with different ratios ofnanoclay pigment was studied. to make nanocomposite coatings, 2, 3, and 4 wt.% of clay (cloisitena+) were incorporated into water emulsified bitumen. the coatings were applied to steel 37. opticalmicroscopy and x-ray diffraction (xrd) were used to characterize the nanocomposite structure. inorder ...

The stones used in Pasargadae world heritage site are different in texture and color as well as chemical characters. Despite equal environment condition, they have been damaged in different forms. The aim of this study is Identification of stones compositions and decays through XRD and XRF analysis. Also, some surface investigations have been done by Digital Macroscopic and Scanning Electr...

2004
Parfait Miakatsindila

This study investigates the removal of tungsten from simulated water using biopolymer coated particles (i.e. chitosan coated clay) and natural clay. The effects of initial tungsten concentration (from 20 to 500 ppm) and water pH (4, 5.5 and 6.4) on zeta potential and tungsten removal were studied for both chitosan coated clay and natural clay. It was found that the net surface charge of natural...

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