Page 1 of 24 - About 238 Essays
  • Stainless Steel Case Study

    form the passive layer (described in further detail in the corrosion resistant part). The higher the content used the greater the protection of stainless steel from rust will be achieved. Nickel → steadies the result of austenitic structure formation which enhances strength, ductility and toughness. It also increases the high temperature strength and cryogenic temperatures. It also makes the material non-magnetic. Manganese → also acts as an austenite stabilizer but it also assists in removing oxidation during melting temperature and prevents the formation of iron sulphide which cause hot cracking. Silicon → acts as a de-oxidant and acts as a ferrite stabilizer Molybdenum → adds resistance to localized pitting attack and chlorides attacks Aluminium → lowers hardenability and increases toughness and ductility Columbium → acts as a grain refines in which reduces intergranular corrosion and raises the formation of ferritic stage when combined with carbon Copper → increases their resistance to corrosion in particular stress corrosion cracking. It also provides age hardening effect. Titanium → very similar to columbium it acts as a grain refines in which reduces intergranular corrosion and raises the formation of ferritic stage when combined with carbon Sulphur → is used to improve machinability but with consequence of reducing resistance of pitting corrosion and may form unwanted sulphide inclusions. 5 Main groups of stainless steel [8] Figure 3: Graphical representation of…

    Words: 1639 - Pages: 7
  • Al, Alloy 1 And Elece

    Fig. 2 and Table 1 present the open circuit potential versus time curves and self-corrosion rate of Al, Alloy 1 and Alloy 2 electrodes in 2 M NaCl electrolyte, respectively. Corrosion rates were obtained by weight loss measurements in 2 M NaCl solution after 60 min. As seen in Table 1, the corrosion rate increases in the following order: Al <Alloy 1 < Alloy 2. Fig. 2 indicates that open circuit potential of Alloy 1, 2 (especially Alloy2) is more negative than that of Al. It can be seen that the…

    Words: 1504 - Pages: 7
  • Magnesium Research Paper

    \par Magnesium: As aluminum has been established as a leading role in automotive industry, the use of magnesium in automobile applications is yet limited. Magnesium exhibits a poor formability whereas aluminum has superior formability at room temperature. The main features of ductile magnesium alloys are that they have homogeneous microstructure which is free of brittle inter-metallic particles and having uniform plastic deformation promoted by its grain size as well as its crystallographic…

    Words: 996 - Pages: 4
  • Chemistry Of Waxing Essay

    Chemistry is a world many of us forget exist in our daily lives. We go about our routines, forgetting that chemistry plays a key role in our lives. As a skier, I noticed the unseen world of chemistry when I am preparing for ski races, waxing my skis. Preparing my skis for a race weekend requires applying multiple layers of wax to my skis. The wax we use is commonly a fluorocarbon mixture. In order for the wax to be saturated into the ski, the block must be melted with an iron. Once the…

    Words: 442 - Pages: 2
  • Pros And Cons Of Metal Roofing

    Making The Case For Metal Roofing: The Pros Outweigh The Cons By A Long Shot What your roof is made of makes a big difference in how your home takes care of you and your family. For the following reasons, metal is, more often than not, the best choice for the job. The Pros Of Metal Roofing Longevity A metal roof is likely to remain functional and intact for as long as the home it covers does, resisting weather, rot, infestations and water all the while. According to one industry study, your…

    Words: 640 - Pages: 3
  • The Hall-Heroult Process

    This paper will discuss about "the Hall-Heroult Process" history, process, and the two scientists that created this process. The Hall-Heroult process came to be in 1886 in the race of commercially viable route to aluminum by two men working independently, who are Paul Heroult and Charles M. Hall who was assisted by his sister Julia Brainerd Hall. The Hall-Heroult process is the process for smelting aluminum that involves dissolving the aluminum oxide in molten cryolite and electrolysis the…

    Words: 873 - Pages: 4
  • Tungsten Carbide Case Study

    Koutsomichalis et al (2008) discussed that having high hardness and good adhesion with the substrate the sprayed coating exhibited satisfactory wear resistance. Tungsten carbide is an advanced ceramic material combining a unique set of properties such as high hardness, high melting point, wear resistance, good thermal shock resistance, thermal conductivity and good resistance against oxidation. They can be applied as coatings by thermal spraying processes such as plasma-spraying, high-velocity…

    Words: 1201 - Pages: 5
  • Executive Summary: Trane Company

    In the 70’s a few companies tried their hand at making outdoor coils using all aluminum, environmental corrosion turned out to be a conquering opponent. Only one company had success, which was Trane Company, due to a very cleaver design, where the condensing tube is covered with glue an additional piece of aluminum. This additional piece is sacrificed to the environment, allowing the primary tube to stay in tack. Trane patented the process in details making it extremely hard to duplicate. In a…

    Words: 764 - Pages: 4
  • The Pros And Cons Of Ingot Casting

    All metal manufacturing includes a solidification process. The metal is either atomised to a powder, or it is cast. There is several casting methods used today. Many of the methods use the mould only once, for example sand mould casting, the lost-wax method and precision casting. For larger quantities of liquid metal, there are basically two methods: ingot casting and continuous casting. Ingot casting normally uses a permanent mould made by cast iron isolated by ceramic material. There are…

    Words: 387 - Pages: 2
  • Titanium Research Paper

    Titanium is a low-density element (has 60% density of steel), that be able to be highly modified by alloying and distortion processing. Titanium is non magnetic, non toxic and has good heat transfer properties. Titanium and its alloys have melting points advanced those of steels, but maximum useful temperatures for structural applications usually range from 425-540C°. Titanium has good resistance to attack by most mineral acids and chlorides [ASM]. The combination of high strength, stiffness,…

    Words: 745 - Pages: 3
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