During the process of TIG welding, an arc is formed between a pointed tungsten electrode and the area to be welded. As a result of the gas shield, a clean weld is formed. This prevents oxidization from occurring. The arc is started with a tungsten electrode shielded by inert gas and filler rod is fed into the weld puddle separately. A slower process than MIG, it produces a more precise weld and can be used at lower amperages for thinner metal and can be used on exotic metals.
In the 1950’s, some welders started to use carbon dioxide as a shielding gas as an alternative to the more expensive argon and helium. It proved to be ineffective for welding aluminum and magnesium because it reduced the weld quality, so it is rarely used today. The use of any shielding gas containing oxygen will quickly contaminate the tungsten electrode and should not be used in GTAW. GTAW is a widely used process for welding metal. Its arc is established between the tip of a non-consumable tungsten electrode and the work piece with a shielding gas applied to protect the arc and the weld pool area.
Oxy Fuel cutting (OFC) uses two gases (always oxygen, and usually acetylene) that combine and burn in a high temperature reaction to rapidly oxidize and "burn" the metal away. This process is good for cutting low carbon steels. Unfortunately aluminum and most stainless steel cannot be cut with the cutting process. Even small systems are good for cutting up to two inch thick plate steel. The cut is fairly smooth, but the kerf can be quite large and much metal can be wasted.
The mechanical power is converted into electricity to power homes and businesses. Wind plants produce electricity that emits zero pollutants. The environmental concern from the wind power plants is minimal; the problems that arise are the noise created from the rotator blades and the killing of birds by flying into the blades. With some technological advances, that issue was drastically reduced. Another major challenge is that the wind does not blow all the time, therefore, the turbines do not spin and no power is created during these
Reactivity of Metals Background Information When a metal (such as magnesium, aluminium, zinc and copper) is mixed with hydrochloric acid, a hydrogen gas is produced. If hydrogen gas is produced, a pop sound should be heard when a flame is held over the substance. On the periodic table the most highly reactive elements are in the first group and the least reactive are in the last group. All metals have the same properties, they are shiny, they conduct heat and electricity, they are malleable which means able to change shape permanently without breaking or cracking, and they are also ductile which means they are able to be deformed without losing their strength. Aim To compare the reactivity of various metals by observing their reaction with hydrochloric acid Hypothesis That the all the metals will produce foam and a pop.
All stones exposed to water did not loose any mass. Since Vinegar is a simulator of acid rain we can predict that Granite and Sandstone should be used. I could have gotten better data if I used a more precise scale. My scale only measured to the half of a gram so it was hard to find a change in mass. Also I could have used the same shape of stone because surface area could have been a
isolate for 100meters in all directions. does not burn but will support combustion, can react explosively with fuels, and containers may explode when heated. first aide move to fresh air administer 02, and keep the victim warm and quiet. 1075- butane, propane, liquefied petroleum, and propylene; extremely flammable and will cause explosive gases when mixed with air. DO NOT try to extinguish a fire unless the leak can be stopped.
Adam Ward Composition 1 Analysis Essay 1 Polishing Aluminum No one likes to see a nice clean car or truck with dirty rims. Today what I am going to tell how to fix this dilemma with just a few materials and a bit of effort. These days, most rims on all motor vehicles including ATV’s and UTV’s are made out of aluminum. Aluminum is a very light, but durable, metal along with a good looking style. To get your old anodized aluminum looking brand new with a mirror finish you will need some different grits of sandpaper—150, 320, 600, 1000, and 2000.
- signs of chemical change = changes the shape and color, creates a gas, distributes heat, Etc. - Chemical Change= Substance is formed into a completely new substance 2. Hypothesis: If the copper is being tested in these metals ( Copper, Magnesium and cupric chloride) then it would be the least reactive out of magnesium and zinc because it is the lowest among the three on the activity series. 3. Experimental Design: - Independent Variable: different types of metals: magnesium, zinc and Copper - Dependent Variable: amount of reactants observed for each metal - Control : The Air -Constants: The amount of chemical solutions, the time the metals were in the chemical solutions and size of each metal during the experiment 4.
Biochar is made by slow cooking plant wastes until it becomes a carbon-rich char that is mixed with soil and buried underground. This process keeps the carbon created by the plant waste in the soil instead of being released into the atmosphere. Charcoal has positive effects on plant life. It adds a source of carbon to plants, speeds water drainage, allows good air flow in the soil and stops the growth of bacteria and fungi. The company Carbon Gold who will help to create the product, states that it is an effective way of removing carbon dioxide from the atmosphere.