1- Please marked the correct answer as a cincular in each step (each one 10 p) i. Crevice corrosion can be seen only if the passive film exists on-the metal surface whereas pitting corrosion is not. ii. Contact between metal and nonmetal surfaces can cause pitting corrosion as in the case of gasket. True. False iii. A crevice must be wide enough to permit liquid entry sufficiently narrow to maintain a stagnant zone. True. False iv. Crevice corrosion resistance will be achieved with an active passive metal possessing a small critical current density True. False v. Increasing crevice width causes an increase in crevice corrosion resistance. True. False