Iron micaceous

Glauconite. Glauconite [1317-57-3] (123—126) is a green, dioctahedral, micaceous clay rich in ferric iron and potassium. The generally accepted formula for glauconite is (Na,K)Q yg(Fe " oi o 45 o 65 35) io( )2 Glauconite has many characteristics common to iUite, but much... 

Celadonite [71606-04-7] is an iron-rich dioctahedral micaceous mineral that is similar to glauconite. Celadonite has a composition of (Na,K)Q... 

A frequently cited example of protection from atmospheric corrosion is the Eiffel Tower. The narrow and, for that age, thin sections required a good priming of red lead for protection against corrosion. The top coat was linseed oil with white lead, and later coatings of ochre, iron oxide, and micaceous iron oxide were added. Since its constmction the coating has been renewed several times [29]. Modern atmospheric corrosion protection uses quick-drying nitrocellulose, synthetic resins, and reaction resins (two-component mixes). The chemist Leo Baekeland discovered the synthetic material named after him, Bakelite, in 1907. Three years later the first synthetic resin (phenol formaldehyde) proved itself in a protective paint. A new materials era had dawned. 

Most pigments can be used in any type of binder therefore, paints cannot be identified by pigment type alone. For example, micaceous iron oxide pigment is traditionally in an oil-based binder but is being increasingly used in epoxies, etc. In the paint coating film, the pigment content may vary from 15 to 60 per cent. In the special case of zinc rich primers, it is over 90 per cent. 

Modified pretreatment primer plus zinc chromate primer plus two coats of micaceous iron oxide/polyurethane. 

Pretreatment primer plus micaceous iron oxide/long oil tung phenolic. 

Pigments for finishes are selected on the basis of their colour, but special attention must be paid to inertness in the chosen binder and stability and light fastness under the conditions of application and exposure. Flake pigments such as aluminium and micaceous iron oxide give finishes of lower moisture-vapour permeability than conventional pigments, and consequently contribute to better protection. 

Micaceous iron oxides are produced in a process which involves heating FeCl3 and iron at 500-1000 °C to form molten Fe complexes which are then oxidized to micaceous hematite the diameter of the plates can be varied from 5 to 75 pm depending on whether the oxide is intended for use in a primer paint or a topcoat (Carter, 1988). 

Uchida, S Sato,T. Okuwaki, A. (1993) Synthesis of monodispersed micaceous iron oxide by the oxidation of iron with oxygen under hydrothermal conditions. J. Chem. Techn. Biotechn. 57 221-227 Ugwuegbu, B.J. Prasher, S.O. Ahmad, D. Dutilleul, P. (2001) Bioremediation of residual fertilizer nitrate II. Soil redox potential and soluble iron as indicators of soil health during treatment. J. Environ. Qual. 30 Ills... 

In the following year Hatchett was made a Fellow of the Royal Society. In 1798 he analyzed an earthy substance, sydneia, which Josiah Wedgwood had found in New South Wales and another specimen of it provided by Sir Joseph Banks (5). This, according to Wedgwood, was composed of a fine white sand, a soft white earth, some colourless micaceous particles, and some which were black. Hatchett found it to consist of siliceous earth, alumine, oxide of iron, and black lead or graphite and concluded that the Sydneian genus, in future, must be omitted in the mineral system. ... 

This same oxide exists in a variety of other forms, such os a fibrous mass, with the fibres radiating from a centre, in which state it is termed the red hematite or fibrous iron ore. When the ore is an amorphous mass, it is termed compact iron, ore when mixed with clay and other earthy matters, red ochre when hard, and combined with silica, jaspery ore / whon in scales of a black metallic lustra, it is known as micaceous iron ore or iron glance. 

Hematite is found in large quantities in the vicinity of Malaga in Spain (Spanish red) and near the Persian Gulf (Persian red). The Spanish reds have a brown undertone. Their water-soluble salt content is very low and their Fe203 content often exceeds 90 %. The Persian reds have a pure hue, but their water-soluble salt content is disadvantageous for some applications. Other natural hematite deposits are of only local importance. A special variety occurs in the form of platelets and is extracted in large quantities in Karnten (Austria). This micaceous iron oxide, is mainly used in corrosion protection coatings. 

In a new process, micaceous iron oxide is obtained in high yield by reacting iron(III) chloride and iron at 500-1000 °C in an oxidizing atmosphere in a tubular reactor [3.11],... 

Pigments with a physical protective action are chemically inert and are termed inactive or passive. An example is micaceous iron oxide [5.54], [5.55]. These lamellar pigments are packed in layers they lengthen the pathways and obstruct the penetration of ions. They improve adhesion between the substrate and the coating, absorb UV radiation, and protect the underlying binder (Fig. 68), [5.56]—[5.60]. 

In principle, all lamellar minerals may be used as barrier pigments, e.g., micaceous iron oxide [5.167]-[5.169], layer silicates (mica), linear polymeric silicates (wollas-tonite), and talc [5.170], However, untreated mica and talc are not very suitable because they are highly permeable to water [5.57]. The surface can be modified with, for example, silanes or titanates, to reduce water permeability and improve adhesion... 

Micaceous iron oxide [1317-60-8] Fe203 (specular hematite) 4.6-48 dark gray... 

New Developments Based on Non-Micaceous Systems. The class of single crystal lustrous pigments is not limited to the non-absorbing types like bismuth oxychloride and basic lead carbonate. Recent developments are absorbing pigments such as platelet-like graphite, laminar phthalocyanines and flaky iron oxides. These flakes... 

C eladonitc is an iron-rich dioctahedral micaceous mineral that is similar lo glauconite. Celadonite has a composition of (Na, Kla.s.tlFc. Alj M6i)(,vFc o.2o)r.ns(Si.i siAln,io)Oui(OH)i (39) and. like glauconile. has well crystalline, poorly crystalline, and inlerslratilied varieties. 

Pigments used in barrier coatings should also be hydrophobic in nature, and possess good adhesion across pigment-binder interfaces. Some typical pigments used are flat platey aluminum flakes, glass flakes, stailness steel flakes and micaceous iron oxide. 

Micaceous iron oxide epoxy primer High-build epoxy lining... 

Micaceous iron ore is the name given to crystalline ferric oxide exhibiting a foliated structure of dark grey scales that glisten like mica. No mica, however, is present in the ore. It is found in the Lake Superior district, U.S.A., but the finest crystals come from Elba. Prior to the European war of 1914 micaceous ore was raised in Devonshire 3 and sent to Germany under the name of shining ore. Hardness 6 density 5-2. 

Micaceous iron ore Fe203 52 6 Fohated variety of specular iron. 

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