Modeling and optimization of the molten salt cleaning process

Molten salt cleaning is a very efficient and effective cleaning method for removing paints, oils and greases, ceramics, and oxide scales from the surface of metal substrates. Although this cleaning method has been used for decades, very limited research work can be found in literature to help remanufacturers in process modeling and parameter optimization. In order to fill the gap, the effects of molten salt on different types of metal substrates are investigated. The impact on the hardness and tensile strength of the substrates is studied. The relationship between the cleaning performances and processing parameters including salt ingredients and temperature, are explored. Finally, mathematical models are suggested to provide remanufacturers directions in selection of the optimal parameters for the molten salt cleaning process. •The potential damage effects of molten salt on metals are investigated.•The impacts of process parameters are analyzed with designed experiments.•Mathematical models are created for modeling the molten salt cleaning process.•The optimum parameter settings of the cleaning process are provided.