Stainless Steels: must have at least 10% chromium A. Ferritic Stainless Steels: Iron‚ chromium + low carbon a. Magnetic b. Lowest cost c. Non-hardenable i. Can be annealed d. BCC structure e. Low carbon ii. Less than .2% f. Chromium content iii. 16-20% g. B. Martensitic Stainless Steel: iron‚ chromium + higher carbon h. Magnetic i. Martensitic Structure j. Hardenable k. High Carbon
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Rusting of iron couplingCertification : It has been certified that Akash Sharma having CBSE Roll No. Studying in XII-A (Science)‚ during the academic year 2010-11 has completed a project on the Study of the Affect of Metal Coupling on the Rusting of Iron and has given satisfactory account of this in his project report Shri D.K Gupta External Examiner PGT Chemistry Signature Signature Declaration : I ‚ Akash Sharma of Class XII A (Science)
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industrial metals‚ generally iron. In a blast furnace‚ fuel‚ ore‚ and flux (limestone) are continuously supplied through the top of the furnace‚ while air (sometimes with oxygen enrichment) is blown into the lower section of the furnace‚ so that the chemical reactions take place throughout the furnace as the material moves downward. In the blast furnace‚ it is so hot that carbon monoxide can be used to reduce the iron oxide in place of carbon: iron oxide + carbon monoxide → iron + carbon dioxide Fe2O3
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percent of iron in an unknown sample will be determined by using a redox titration and then compared to a different method. A primary standard which in this case is ferrous ammonium sulfate will be used to standardize potassium dichromate. The standardized potassium dichromate will then be used to titrate the unknown iron sample using the indicator p-diphenylamine sulfonate. The standardized potassium dichromate which has a concentration around 0.017 M is then titrated into the unknown iron sample
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colour because of the sulphuric acid but during the leaching process‚ the copper was dissolved into the sulphuric acid giving it its blue colour. During the cementation process‚ the copper was replaces with the iron as it was more reactive‚ therefore the copper swapped places with the iron‚ as shown by the brown colour and then the solution became clear
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ALLOYS Unit – 7 Ferrous: Iron based alloys Non-ferrous: other than ferrous alloys with no iron content FERROUS METALS AND ALLOYS What is a ‘ferrous metal’ or ‘ferrous alloy’? It is simply a metal or alloy that contains Iron (the element ferrous) as the base (starting) metal. 26th element Iron or Ferrous 55.85 Atomic Mass GENERAL CATEGORIES OF FERROUS METALS AND ALLOYS Carbon and alloy steels Stainless steel Tool and Die steel Cast Irons Cast Steels **Ferrous tools
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structure‚ and a reasonable leverage ratio with no risk of liquidity. With a strong financial position‚ the firm considers reducing its dependence on precious metals by diversifying into base metals and other minerals. An investment opportunity for mining iron ore in South Africa looks promising but still carries substantial risk. A high risk of civil war in neighboring countries along with strong fears that the South African government will nationalize mining operations combine to create an unstable political
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Resources‚ Conservation and Recycling 21 (1997) 145–173 Metals recycling: economic and environmental implications Robert U. Ayres * INSEAD‚ Boule6ard de Constance‚ F-77305‚ Fontainebleau‚ France Received 17 July 1997; accepted 27 July 1997 Abstract We are in a period of economic transition. The ‘cowboy economy’ of the past is obsolescent‚ if not obsolete. Environmental services are no longer free goods‚ and this fact is driving major changes. Recycling is the wave of the (immediate) future
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especially of protective metal coatings‚ and of the influence of manganese in the rusting of steel. Alford‚ H. Carroll: Corrosion of iron and its prevention. 2‚200 w. 1901. (In Proceedings of the St. Louis Railway Club‚ v. 5‚ April 12‚ p. 9.) Theory of rust formation and preventive measures. American Society for Testing Materials: 1‚800 w. 1906. (In Iron age‚ v. 77‚ p. 2057.) Abstracts of papers at ninth annual meeting of the society; corrosion of tube steel‚ corrosion of wire fencing‚ electrolysis
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Metals Physical Properties of Metals versus Non-metals Properties | Electrical conductivity | Heat conductivity | Melting and Boiling points | Malleability & ductility | Lustre | Metals | Good | Good | High | High | Shiny | Non-metals | Poor | Poor | Low | Low (Brittle) | Dull | Chemical Properties of Metals versus Non-Metals Properties | Metals | Non- metals | Reaction with oxygen | Form basic or amphoteric oxides | Form acidic or neutral oxides | Ionisation | Lose electrons
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