1) (3) rubber bands
2) (3) aluminum strips with crevices
3) 18 g of Sodium Chloride
4) 41 g of Ferric Chloride
5) (3) 600 ml beakers
6) (1) incubator
7) (1) storage bin
8) (1) aquarium heater
9) (1) aquarium circulator
10) (3) sheets of plastic wrap
11) duck tape
12) felt pen
13) scale
14) ruler
I first collected all the materials. I then took the three rubber bands and stretched them tightly around each of the three aluminum strips with crevices. Then I took each of the three beakers and filled them up with 400ml of water. I then added the sodium chloride solution and the ferric chloride solution in each beaker. The ratio of ferric chloride to sodium chloride was 2:1. I added 6g of sodium chloride and 12g of ferric chloride in each beaker. Each of the aluminum strips with crevices was placed in the three beakers. The beakers were covered with plastic wrap and the elastic was stretched around each beaker to hold the plastic wrap in place. Each beaker was labeled 1, 2 and 3 for easy identification. Beaker number 1 was placed in an incubator and the temperature was maintained at a constant 61˚C. Beaker number 2 was placed in a storage bin filled with water. An aquarium heater was added to the bin that will heat the water to a constant temperature of 32˚C. I also added an aquarium circulator in the bin to keep the temperature constant around the entire beaker. The bin was then covered with a lid to keep the heat inside. Beaker number 3 was left at room temperature at 20˚C. The amount of crevice corrosion was measured on a regular basis. The weight of each aluminum strip was measured at the end of the experiment. The results were recorded.