Corrosion of Steel Lab Report Sample

Corrosion of Steel Lab Report Paper The products of these reactions can be identified by using complex ion indicators that assume a certain color depending upon the type Of action present At electrode 1, it was observed that bubbles were being formed. The reaction occurring at this electrode is a catholic reaction and as such the bubbles can be deduced to be H2O gas from the reactants involved. 21-4*4- e- -? H2O(gas) No disconsolation of the indicator means that no corrosion was occurring at this electrode. Electrodes 2 through till 5 showed no visible reaction. From inspection of a Portrait diagram it can be seen that for a pH of 2, Fee is in the catholic immunity region where no oxidation occurs, which is why no reaction is observed. Electrode 6 was seen to turn a distinct blue color due to the presence f F-e+ ions, This is because the potential involved in this oxidation reaction is in the active region. Fee , Fee++ e- The potential at electrode 6 is not high enough to form a protective Crack layer, as the Cry does not have sufficient energy to oxides to Cry(all), therefore it corrodes. There was no visible reaction observed between electrodes through till 22 This is because the potentials involved in these reactions are in the passive region. The Cry in the electrodes creates a protective layer of Crack which slows down the corrosion of the electrodes to the extent that it is unnoticeable to the eked eye. A pink disconsolation was observed at electrodes 23 and 24, which indicates the presence of Fee+ ions. Fee -? Fee+ + e- This is because at a certain potential the Cry(all) turns into Cry(VI). We will write a custom essay sample on Corrosion of Steel Lab Report specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Corrosion of Steel Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Corrosion of Steel Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer This in turn breaks down the protective barrier layer, and exposes Fee* ions on the electrode underneath Which make the pink color. We dont see this pink color at any other points because in order for the Fee in the electrodes to noise energy needs to be absorbed before the reaction may continue, and this is supplied by the higher potential of the more anodic electrodes of higher numbers. This region is now as the trans. Passive region. 2. Results Part 2: Away (Fee) = 55,egg/mol -0. ASK, p = 7. G/com From Graph: 0913. 333=papa/com Emmy: Pep IP Core 3. Discussion: apt is used as the counter electrode because it is inert, and because it has a high capability to catalyst the reaction of proton reduction. The working electrode is mounted in an epoxy resin so that it is easy to control the surface area exposed to corrosion. It is important to abrade the working electrode before starting the experiment to polish the surface and remove any contaminants that may alter the results of the expe riment.