Chromium

Feces, acid, and cancer are jeopardizing the lives of the human and marine species around the world quite possible destroying the entire planet. Maybe it is many years away, but why just sit around and wait for it to happen? Sewage facilities and manufacturing industries are the primary culprits behind disease repleted water, acidic oceans, and cancer causing agents in tap water, either follow proper regulations or getting around them. There are many means to limit the costly effects that sewage…

steel alloy which features 10.5% of chromium. Stainless steel does not rust or stain like normal steel would and even though it is called stainless steel, it is not entirely stainless, because in low-oxygen, high salinity environments it is able to be stained. The main difference between stainless steel and general carbon steel is the amount of chromium present. Due to the amount of chromium that stainless steel contains, the stainless steel will form a chromium oxide film which will help…

is a medical device used for partial hip replacement surgery. The Birmingham Hip Resurfacing device is used to provide stability and mobility for patients with hip pain and joint deterioration. The implant contains two parts, both made of Cobalt-Chromium alloy. The top portion of the implant is spherical, which looks like half of a ball, with a thin cylindrical stem that branches out of the spherical piece. The parts are the acetabular cup and the femoral head. Discussion Acetabular Cup The…

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environment the material originated from. However, the bovine pericardium is not nearly as durable as the pyrolytic carbon and can cause the valve to fail more easily due to calcification of the tissue or damage caused by continuous wear. Cobalt-chromium is used for the stent because it is a durable but still somewhat flexible material that allows the artificial valve to function more closely to that of the original tissue. A disadvantage to this alloy is the material will start to corrode over…

In order to complete this lab in a proper manner, the concept of the beer-lambert law must be understood to ensure success in the experiment. the Beer Lambert Law compares the property of light with material through which the light is travelling.4 So, if all the light passes through a solution without any absorption, then absorbance is zero, and the percent transmitted is 100%. If all the light is absorbed, then percent transmittance is zero, and absorption is infinite.3-4 There are many forms…

using Chromium-6 in their water supply where a small town became exposed. Chromium 6 is a heavy metal known to be a carcinogen to humans as well as causing defects in infants. Brockovich went to numerous families in the area that were exposed to the contaminated water and all were affected in one way or another; brain cancer, tumours, miscarriages etc. PG&E went as far as to pay doctors to tell these families that the abnormalities occurring were caused by different factors and that Chromium-6…

other chronic health problems. Lung cancer being one. Other metals are present in smoking but aren’t as pertinent. Mercury is not very commonly inhaled in dangerous amounts but still can be found naturally. It can be dangerous when released from rocks, volcanoes and forest fires. It is then released naturally throughout the atmosphere. However, airborne mercury contamination results mainly from human activities. The main activities include: Burning of coal, oil, wood that contain mercury, if not…

3. Results and discussion 3.1 Microstructural characterization The Roman spectrum of Cr-DLC coating was shown in Fig.1. The overlapped D peak and G peaks located at 1363cm-1 and 1564cm-1 were obtained after fitted with Gaussian curves, respectively. It’s well known that the content of the graphite crystal was closely related to the value of ID/IG [22]. And the ratio of intensity between D peak and G peak (ID/IG) of Cr-DLC coating could be calculated by the fitted curve. The value of ID/IG was…

it occurs when oxygen reacts with iron to form rust. Stainless steal is not like the normal steels, they are more less likely to stain or rust and is anti-corrosive. It contains the elements of nickel, and must have more than 10% of chromium since it forms a chromium oxide(Cr2O3) that gives a surface (passive film) onto the metal layers and prevent the metal from rusting, corroding and staining. A thin layer will be coating the stainless steel vessel, as it is much stickier and doesn’t dissolve…