Stress corrosion cracking differs from the other types of corrosion in that the surface of the material is virtually unaffected. 2.1.1. list the main factors that affect the stress corrosion cracking. 2.1.2. name the methods that can be used to prevent stress corrosion cracking from happening (5) 2.2. you are a chemical engineer, you have been given 3 chemicals to store in different tanks. the chemicals are benzene, chloroacetic acid and gasoline. the tanks are made of different materials: polytetrafluoroethylene (ptfe), stainless steel (ss), conventional polyethylene (pe#1), rigid polyethylene (pe#2), polypropylene (pp) and nolyvinylchloride (pvc). choose the best 4 tanks for each chemical so that corrosion can be minimised. (12) 2.3. a piece of corroded metal rod was found submerged in the ocean. it was estimated that the original rod had 5 cm diameter, 0.5 m length and approximately 18 kg weight. the rod was corroded a way due to the submersion. assuming a corrosion penetration rate of 0.25 cm/yr for this rod in seawater, estimate the time of submersion in years. the density of alloy is 7850 kg/m3