Method for descaling hot-rolled stainless steel strip

Abstract From the Canadian patent

A descaling method for removing oxide scale from a hot-rolled stainless steel comprising the steps of: applying a solution of an alkaline earth metal chloride to the surface of the oxide scale layer formed on the hot-rolled stainless steel strip, and allowing the solution to penetrate into the oxide scale layer. In a subsequent annealing the solution is heated, and dehydrated to become solid matter and the dehydrated matter is melted and diffused into the oxide scale layer to soften the oxide scale layer. The oxide scale layer is then removed by a simple mechanical descaling by, for example grinding brushes, with or without a subsequent chemical descaling by a weak acid solution.