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Does the normal rusting process of iron depend on bacterial action If bacteria are not present will iron rust extremely slowly By Steve Elias Mr Taylor Period 3 Hypothesis In my experiment I will try to prove that bacteria does have an effect on the process of rusting I believe that the bacteria will have a positive effect on the process of rusting I think this because I have read that they have found huge clumps of rust on the Titanic and inside these clumps were thousands of bacteria This leads me to believe that the bacteria promoted the process of rusting and that in order for there to be massive amounts of rust there has to be bacteria If they found bacteria in these clumps of rust in the Titanic then the rust was formed over the bacteria while they were on the ship and the bacteria actually helped the process of rusting Background information The chemical deterioration of a material usually a metal or metal alloy is called corrosion The most common causes of corrosion are contact with water and oxygen The material with the greatest economic importance that is most affected by corrosion is iron The corrosion of iron is called rusting It consists mainly of hydrated iron III oxide Fe2O3H2O and iron III hydroxide Fe OH 3 The corrosion of metals such as aluminum tin copper and zinc generally stops after a thin layer of metal oxide forms on the exposed surface of the metal This layer serves as a barrier to further contact with oxygen Even when iron combines with oxygen a thin almost invisible coating of iron oxide forms that prevents further rusting when no water molecules are present When water is present however the oxide that forms is bulky and porous allowing oxygen continued access to the iron below Corrosion takes place at a much faster rate
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