Failure Due to Aging 2. The main causes for the structural failure of an aircraft due to aging are briefly discussed as following. (a) Metallic Corrosion. The deterioration of the surface of a metal due to a chemical reaction is called metallic corrosion. This occurs because metals come in contact with electrolyte mostly contaminated water. As it arises‚ it may go undetected and result in loss of integrity of metallic structures. Since metallic corrosion is directly related to structural
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with the phase or phases that are in equilibrium there. b) How many eutectic points are there in the Cu-P phase diagram? ______ How many eutectoid points? ______ How many peritectics? ______ How many peritectoids? ______ How many pure metal phase transitions? ______ How many congruent melting points??______ Q.2 a) A 90 wt% Ag-10 wt% Cu alloy is heated to a temperature within the b + liquid phase region. If the Composition of the liquid phase is 85 wt% Ag‚ determine: (a) The temperature of the
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compound solution. Two Real World Applications for the Technique One real world use for recrystallization is in the creation of aspirin‚ making the substance pure and safe to be ingested. Another use of recrystallization is in metal‚ where old‚ stressed metal can be purified into a new‚ stress-free surface. References http://chemistry.about.com/od/chemistryhowtoguide/ss/recrystallize.htm http://designerdrugs.com/pte/12.162.180.114/dcd/chemistry/equipment/recrystallization.html http://www
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this element I thought it was some type of gas but it can turn it to a liquid at a certain type of liquid. But is actually a very shiny type of metal. Rubidium was discovered by Kirchoff and Bunsen in 1861 through the use of a spectroscope. Rubidium metal can be made by minimizing rubidium chloride with calcium with other substances. The cost of this metal in small quantities is approximately 25 U.S. dollars a gram. This element is obtained in the earths crust which is very useful to people. It is
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Purpose: The purpose of this experiment is to observe the colours produced when the solutions of metal ions are heated to high temperatures‚ then to explain the results in terms of the energy levels of the metal ions. Lastly‚ to use the flame colours to identify a series of unknowns. Hypothesis: Substance being tested Predicted flame colour NaCl(s) Yellow NaCl Red-Orange NaNO3 Dark Orange LiNO3 Red Sr(NO3)2 Dark Red KNO3 Blue-Indigo Ba(NO3)2 Yellow-Green Cu(NO3)2 Green Ca(NO3)2
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Flint became the backbone of economy. He began digging the earth‚ taking out new treasures and burning them. Thus was produced‚ some 6000 years ago‚ a new mineral‚ and from that a new material to which‚ much later‚ we have given the name copper metal. And that day began the Copper Age. In fact‚ this was the beginning of both mining and metallurgy. Not satisfied with copper any longer than a few hundred years‚ he began experiments with other metallic ores like tin‚ zinc and lead‚ and with a stroke
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Date: 20/03/13 Flame Test – Investigating Compounds Aims To identify the presence of a relatively small amount (ie low concentration) of a metal ion in a compound. Method 1. Clean a platinum or nichrome wire by dipping it into concentrated hydrochloric acid. 2. Hold the platinum or nichrome wire at the hottest or blue part of a non-luminous Bunsen flame. 3. Repeat until the wire does not produce any colour in the flame (note: do not touch the wire‚ as salt in sweat will produce
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Aim • To calculate the SHC of water • To see how accurately I can measure a known quantity Research Question • Will the experiment carried out give us a good approximation of the SHC of water? Hypothesis • The result we will get as the SHC of water will not be exactly the same as the literature value‚ but will be a very close figure to the literature value of the SHC of water as there will be some limitations to our experiment. Variables Independent: temperature of water Dependent:
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improper BP cleaning‚ reverse etching or activation. Possible causes of poor adhesion include: • Improper activation. Proper activation of the base metal is important for deposit adhesion. Different base metals and hardness require different reverse etching times or activation steps. It’s therefore important to know the base metal being plated. • Improper cleaning. Parts need to be properly cleaned BP to remove all traces of oils‚ organics and surface debris. Refer to both the Process
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Discussion The reactivity series is a list of metals arranged in order of their reactivity based on displacement reactions‚ reduction of their oxides by hydrogen or carbon‚ the relative ease of decomposition of their compounds and reactions with oxygen‚ dilute acids and water. The higher up a metal is in the reactivity series‚ the more reactive it is. In the experiment conducted‚ the three metals‚ magnesium‚ zinc and copper each had to undergo displacement reactions and reactions with water‚ oxygen
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