A dishwashing detergent composition is provided for consumer use for in cleaning of alkaline sensitive metals such as aluminum or aluminum containing alloys. The compositions include alternatives to sodium tripolyphosphate and/or other phosphorus containing raw materials, while retaining cleaning performance and corrosion prevention. According to the invention, a phosphinosuccinic acid oligomer or mixture thereof is used as a corrosion inhibitor and can be included for aluminum protection in a number of different detergent compositions.