Passive film stability is very important for the reliable use of many alloys in a given environment. Passive film should also be able to repair or regrow upon damage to provide a reliable protection to alloys. Breakdown and repassivation behavior of passive film plays an important role in localized corrosion of engineering alloys. This paper aims to give a general review of the electrochemical methods used to study the repassivation behavior of alloys and to present two different film removal methods used for repassivation study—namely the scratch test and the electrochemical film-reduction methods. The film reduction method was conducted using carbon steel A569 in borate buffer solution (pH = 8.4) to study the effects of retained plastic strain on the repassivation kinetics of carbon steels. Plastic strain was found to improve the initial repassivation kinetics of carbon steel. The scratch tests were performed on a duplex stainless steel UNS S32003 in both chloride (Cl⁻) and thiosulfate plus chloride (S₂O₃ ²⁻+ Cl⁻) solutions. Addition of S₂O₃ ²⁻ slows down the repassivation of UNS S32003. Repassivation kinetics of the separated single ferrite phase of UNS S32003 were slower than those of the bulk material.