Not likely. The amount of calcium/magnesium, velocity of drain water etc. has very little scaling ability. The sodium chloride has almost no scaling ability. All of this is rinsed with clear water afterwards. White scale buildup can be caused by many things, but in a residential application it is hard to say. Hard hot water that intersects with a cold water source commonly scales the drain, is this a possibility here? Are you on municipal or well? Commercially, tempering lines from steam boiler blow downs can scale an 8" drain closed in a month. We usually design these applications with sections of pipe that are cheaply and easily replaced or cleaned.