Just want to clarify what you are seeing. All salt calls will everyday build up with mineral scaling that needs to be cleaned off. If however that's more frequently than once every 6-12 weeks, that's usually an indication of an abnormally high "saturation index", which can get balanced and fixed. If by corrosion you happen to mean you *erosion*, and you're seeing damaged or eaten-away areas of your cell, that's usually a low saturation index, which can also be balanced and prevented. Do a web search of "pool saturation index" for more information.