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ALUMINIUM DISSOLUTION

thread338-22050

ALUMINIUM DISSOLUTION

ALUMINIUM DISSOLUTION

(OP)

What is the concentration of NaOH required in a caustic/water solution to cause maximum dissolution rate of aluminium?

We currently use 25% NaOH to dissolve aluminium from extrusion dies.

RE: ALUMINIUM DISSOLUTION

Aluminium dissolution will increase with increasing pH, so a concentrated NaOH solution should provide maximum dissolution.  However, you may not want to handle concentrated NaOH, so use the maximum concentration you are comfortable with.

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