Because the reactant particles collide less frequently, and are less likely to react when they do collide. In addition, when they do collide they are less likely to have energy greater than the Activation Energy, so each collision is less likely to be successful. As a result, the reaction happens at a slower rate.

The rate is proportional to the concentration of a reactant. When you double the concentration the rate doubles. The rate is not affected by the concentration of a reactant. When you double the concentration the rate stays exactly the same.

Reactant Concentrations Raising the concentrations of reactants makes the reaction happen at a faster rate. For a chemical reaction to occur, there must be a certain number of molecules with energies equal to or greater than the activation energy.

There are different ways to determine the rate of a reaction. The method chosen usually depends on the reactants and products involved, and how easy it is to measure changes in them. Rusting is a slow reaction. Give four examples of a very fast reaction.

Oxidation of Iron – a chemical change: This is a chemical property. If iron does rust, this is a slow chemical change since rust is an iron oxide with different properties than iron metal. These atoms and molecules are rearranged so that two iron atoms combine with three atoms of oxygen to form a new compound.

Zinc has lower reduction potential than iron . Therefore , zinc coating acts as anode and the exposed iron portions act as cathode . If zinc coating is broken , zinc still undergoes oxidation , protecting iron from rusting . No attack occurs on iron till all the zinc is corroded.

Steel corrodes quickly in acidic environments and slowly or not at all as alkalinity is increased. The corrosion rate of steel in soil can range from less than 0.2 microns per year in favorable conditions to 20 microns per year or more in very aggressive soils.

4-5 days

This because the corrosion of carbon steel in seawater is oxygen absorb corrosion, which controlled by oxygen distribution, and the anodic polarization energy is very small. The metal corrosion in these areas is quite different, and the most serious corrosion appears in splash zone.

Alright, we all know that steel rusts, and it rusts faster in wet environments. Throw some salt in the mix and you can almost watch it happen. Most everything around water these days is galvanized or aluminum. Steel needs oxygen to oxidize.