The following have all been scratched to expose the iron.1. An iron strip coated in plastic2.An iron strip coated in zinc3. An iron strip coated in tin4. An iron strip coated in paintAll are in a salt solution - which would rust quickly?
iron strip coated in tin, because the iron sacrificially corrodes to protect the tin because it is more reactive than tin. (much like zinc corroding to protect ion). If you want the order from fastest to slowest, i would probably say: 3. iron strip coated in tin (due to sacrificial corrosion 2. iron strip coated with zinc (this time the zinc sacrificially corrodes for the iron, but then eventually the iron will corrode too) 1 and 4 should be similar, but i would go with 4 then 1, as paint is easier to get off than the plastic (evidence is chipped paint on walls, compared to plastic coated paperclip) Rish :)
thomas is wrong. iron + tin will rust quickly. it is due to the reason that iron is more reactive than tin and when tin react with salt,it also gets displaced by iron as iron is more reactive. and plastic is a stable compound,so it will not react.same is for paint.and zinc is more reactive than iron.so zinc will displace iron form its compound made by reaction of salt and ironso it will not rust, thus,,,,most reactive is iron +tin any other problem dude?
you upload weight while it rusts by way of fact which you upload O2. once you scrape off rust you do away with each and all the O2 and multiple of the Fe additionally. So now the scraped iron weighs decrease than it did initially. To get a numerical answer you may desire to be attentive to precisely what sort of iron oxide you receive.
