Aluminium Adhered to Stainless Steel Die: Smart Removal Tip

Summary for aluminium adhered to stainless steel die Discussion

Aluminium adhered to stainless steel die is the issue raised by Sudhir, who says thin aluminium layers build up on pins and curved surfaces during aluminium pressure die casting and that dry ice blasting did not work well. He asks for a way to remove this metal-to-metal adhesion and wonders whether preheating before dry ice blasting would help. The only answer in the thread comes from Dave, who suggests dissolving the aluminium with sodium hydroxide solution. No other methods or cautions are discussed in the excerpt, so the practical takeaway is limited to that chemical-removal suggestion rather than a proven process comparison.