Keywords: نظرسنجی ویژوال; S/S; silane and siloxane; AACI; Amino Alcohol Corrosion Inhibitor; UPV; Ultrasonic Pulse Velocity; Corrosion; Carbonation; Repair coatings; Silane and siloxane; Corrosion inhibitor; Acrylic sealant; Re-alkalisation; Non-destructive tests; Visual survey;