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Iron oxide pigments in jars: yellow, red, brown. Iron oxide red is a generic name of a ferric oxide pigment of reddish colors. Multiple shades based on both anhydrous Fe 2 O 3 and its hydrates were known to painters since prehistory. The pigments were originally obtained from natural sources, since the 20th century they are mostly synthetic.
Iron(III) oxide in a vial. Iron(III) oxide or ferric oxide is the inorganic compound with the formula Fe 2 O 3. It occurs in nature as the mineral hematite, which serves as the primary source of iron for the steel industry. It is also known as red iron oxide, especially when used in pigments.
A water-based primer, used primarily on wood. A primer (/ ˈ p r aɪ m ər /) or undercoat is a preparatory coating put on materials before painting.Priming ensures better adhesion of paint to the surface, increases paint durability, and provides additional protection for the material being painted.
Hematite (/ ˈ h iː m ə ˌ t aɪ t, ˈ h ɛ m ə-/), also spelled as haematite, is a common iron oxide compound with the formula, Fe 2 O 3 and is widely found in rocks and soils. [6] Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of Fe
A standard black oxide is magnetite (Fe 3 O 4), which is more mechanically stable on the surface and provides better corrosion protection than red oxide Fe 2 O 3. Modern industrial approaches to forming black oxide include the hot and mid-temperature processes described below. Traditional methods are described in the article on bluing. They are ...
The nitric acid process produces nitric acid for use in making ammonium nitrate fertiliser. Using the Ostwald process, ammonia is vaporised and then oxidised over a 95% platinum and 5% rhodium catalyst at 930 °C (1,710 °F) and 6.5 bar (650 kPa) to form nitric oxide and superheated steam. The reaction gases are cooled to 38 °C (100 °F ...
Although not the first English-language newspaper in South Africa, the Cape Argus was the first locally to use the telegraph for news gathering. As of 2012, the Argus had a daily readership of 294000, according to the South African Advertising Research Foundation's All Media Products Survey (Amps) Newspaper Readership and Trends.
General elections were held in South Africa on 29 May 2024 to elect a new National Assembly as well as the provincial legislature in each of the nine provinces. [1] [2] This was the 7th general election held under the conditions of universal adult suffrage since the end of the apartheid era in 1994.