where can i find info about the potential health risks of cutting galvanized sheet metal with a flame?
98448
Occupational exposure to any fumes and/or chemicals can create inflammatory responses within your lung tissue. When this inflammation occurs on a daily basis over a several year period, your lung tissue, specifically the parenchyma will become damaged similiar to that of a chronic smoker. The parenchyma is the distal portion of your lungs that partake in gas exchange (Co2 and 02), when this layer of blood vessels and tissue become destroyed, there is no way to repair the damage. Just think of a coal miner's lung
789930
The process of galvanizing consists of coating metals, such as iron and steel, with a thin protective layer of zinc.  The layer of zinc provides protection to the metal from corrosion.  The result of galvanizing is a corrosion resistant product to be used for  many outdoor applications, where the weather is a factor in the life expectancy of the material.  The protective layer of zinc prevents the ferrous material from coming in contact with the oxygen causing oxidation.  Oxidation is the combination of a substance with oxygen, in iron and steel the main combination result is rust. Without this contact the ferrous material does not corrode.  An example of how this works is when iron reacts with oxygen it forms iron oxide (the main component in corrosion), however if the iron is galvanized the zinc reacts with oxygen causing zinc oxide prior to reaching the iron.  There are two types of oxide caused by iron, ferric oxide and ferrous oxide.\n\nThere are several ways to galvanize steel products, such as hot dip galvanize, electroplating galvanize, mechanical coating, zinc spraying, and zinc dust painting. In hot dip galvanize there are two different processes that are used.  One is the process of continuos hot dip galvanizing which consists of a start point and a finish point.  In between these two points the material never stops going from a raw material (iron/steel) to a finished good ready to be shipped. The other is stationary hot dip galvanizing in which an individual item is dipped into a pot of molten metal and removed. \n\n\n    The following steps are taken in hot dip galvanizing in both hot dip and continuous operations; cleaning, pickling, pre fluxing, galvanizing, cooling, finishing, inspected, and throughout the process the product is rinsed and air blown.  The main difference between the two (continuos hot dip and stationary) is that the material on a continuos operation is finished when the cycle is complete versus just dipping the material in most cases is hand finished to remove excess burs, runs, and bumps that are result of no external wipe (air knife, coal, etc.).\n\n\n=)
28398
I'm not sure about the cancer, though I may ahve heard the notion before... I think the skepticism came from the discovery that over time and excessive use the lining of teflon cookwear can - through high temperatures - begin to change into gases and thus can be inhaled. I'm not sure how much holds true but that's what I've heard.
554085
http://www.corrosion-doctors.org/Biographies/GalvaniBio.htm
360182
Heavy Metal! Just joking. http://www.scienceproject.com/projects/intro/elementary/EX057.asp Go here, they have a lot of information.\n\nhttp://www.science.ca/askascientist/viewquestion.php?qID=1216 And this one. It is clear that aluminum conducts the best heat.
974021
Metals burn with different colors..... check out this web site for more details on exact information.  \n\nhttp://www.science-education.org/classroom_activities/chlorine_compound/metal_chloride.html
453187
If you are really interested in this topic, I recommend reading "The Plutonium Files," a recently published book. It reports on the negative health effects of uranium and plutonium, specifically the results of secret tests performed on civilian citizens and members of the military, by our government. (Almost all of whom were unaware they had unwittingly become guinea pigs.) Very interesting and informative.
381050
My son and I worked on the papertowel comparison test. I am no longer allowed to buy anything but Viva papertowels, LOL! The most interesting project was the Coke test. The test shows how Coke eats away at metal (coins and nails). I have included a web page that is a very good site to go to learn more.\nhttp://www.howstuffworks.com/index.htm
86077
You should get the MSDS sheets for the chemicals that you use, try invitrogen.com this is the best advice without more details on the techniques you're using.\nThere are two techniques I've used, one is detachment using trypsin/EDTA and the other is scraping the cells off the side of the flask. In both methods there is little danger from the tools you use, more danger is posed by the cells themself. If you're using an established cell line, get the details on it from www.atcc.org if not, be extra careful!
691119
Follow the same safety rules for welding stainless as for welding anything else.  You don't say if you are arc-welding, gas-welding or MIG- or TIG-welding, but you shouldn't be breathing the fumes whatever method you are using. The most toxic gases are likely to come from impurities in the metals you are welding rather than the welding gases themselves.\n\nShame on your new employer for assuming you had the appropriate safety training, or shame on you for giving the impression you did!
392073
This may not come out in the paste - if not,try the link below.  \n\nNFPA RATING DEFINITIONS\n\nHEALTH (Blue)  \n4 Materials that on very short exposure could cause death or major residual injury even though prompt medical treatment was given. \n3 Materials that on short exposure could cause serious temporary or residual injury even though prompt medical treatment was given. \n2 Materials that on intense or continued exposure could cause temporary incapacitation or possible residual injury unless prompt medical treatment was given. \n1 Materials that on exposure would cause irritation but only minor residual injury even if no treatment was given. \n0 Materials that on exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. \nFLAMMABILITY (Red)  \n4 Materials that: (a) rapidly or completely vaporize at atmospheric pressure and normal ambient temperatures and burn readily, or (b) are readily dispersed in air and burn readily. \n3 Liquids and solids that can be ignited under almost all ambient temperature conditions. \n2 Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. \n1 Materials that must be preheated before ignition can occur. \n0 Materials that will not burn. \nREACTIVITY (Yellow)  \n4 Materials that in themselves are readily capable of detonation or of explosive decomposition or reaction at normal temperatures and pressures. \n3 Materials that: (a) in themselves are capable of detonation or explosive reaction but require a strong initiating source, or (b) must be heated under confinement before initiation, or (c) react explosively with water. \n2 Materials that: (a) in themselves are normally unstable and readily undergo violent chemical change but do not detonate, or (b) may react violently with water, or (c) may form potentially explosive mixtures with water. \n1 Materials that in themselves are normally stable but which can: (a) become unstable at elevated temperatures, or (b) react with water with some release of energy, but not violently. \n0 Materials that in themselves are normally stable, even when exposed to fire, and that do not react with water. \nSPECIAL Notice Key (White) \nThis field designates special information about the material.  \nW Denotes materials that are water reactive. These compounds undergo rapid energy releases on contact with water. \nOX Denotes materials that are oxidizing agents. These chemicals give up oxygen easily, remove hydrogen from other compounds, or attract negative electrons.
161252
Welders use plasma arcs all the time to cut metal\nyou could probably go see this in action at \na body shop, exhaust repair, or steel fab plant\nor even at your school possibly
548563
try Zinc.....sacrficial protection (galvanizing)\n\nyou can also use aluminium, it will react at first but then it will form a tough protective layer of aluminium oxide, which prevents further reaction....it really works
324394
Goodman and Gilmans.\nToxicology Handbook.\n\nMost librarys have these and more in the reference section.\nI am unfamiliar with a 'list' per se, but if there is such a thing I would ask poison control for information, either their national hotline or your local hospital's pharmacy dept.
667604
Magnesium. Very dangerous around extreme heat as once it is ignited you can not put it out. The military use to cast it for their brakes for their fighter jets because magnesium is so light. However, high speed landings and hot brakes could cause ignition.
847442
Since there are no metallic ions like sodium or copper to produce intense visible light wavelength emissions, I would suspect that the flame would be colorless or the kind of yellow flame you see at natural gas flaring.  I've not done this experiment (it's pretty hazardous).
709868
http://www.welding.com/technical_welding_tips.shtml