Reactions are:

$$\ce{2NaOH + SiO2 -> Na2SiO3 + H2O}$$ $$\ce{4NaOH + SiO2 -> Na4SiO4 + 2H2O}$$ At room temperature it is quite slow, but happens. The real solution is to store alkali hydroxides as solids, not as aqueous solutions. As dry solids, the can be stored in glass virtually forever.

However, if you need to store aqueous $\ce{NaOH}$ like that, the best bet are plastic jugs that chlorine bleach comes in. They are exactly purposed for storing corrosive alkaline solutions.

Reactions are:

$$\ce{2NaOH + SiO2 -> Na2SiO3 + H2O}$$ $$\ce{4NaOH + SiO2 -> Na4SiO4 + 2H2O}$$ At room temperature, these reactions are quite slow but happen. The real solution is to store alkali hydroxides as solids, not as aqueous solutions. As dry solids, they can be stored in glass virtually forever.

However, if you need to store aqueous $\ce{NaOH}$ like that, the best bet is plastic jugs that chlorine bleach comes in. They are exactly purposed for storing corrosive alkaline solutions.

Reaction are:

$$\ce{2NaOH + SiO2 -> Na2SiO3 + H2O}$$ $$\ce{4NaOH + SiO2 -> Na4SiO4 + 2H2O}$$ At room temperature it is quite slow, but happens. The real solution is to store alkali hydroxides as solids, not as aqueous solutions. As dry solids, the can be stored in glass virtually forever.

However, if you need to store aqueous $\ce{NaOH}$ like that, the best bet are plastic jugs that chlorine bleach comes in. They are exactly purposed for storing corrosive alkaline solutions.

Reactions are:

$$\ce{2NaOH + SiO2 -> Na2SiO3 + H2O}$$ $$\ce{4NaOH + SiO2 -> Na4SiO4 + 2H2O}$$ At room temperature it is quite slow, but happens. The real solution is to store alkali hydroxides as solids, not as aqueous solutions. As dry solids, the can be stored in glass virtually forever.

However, if you need to store aqueous $\ce{NaOH}$ like that, the best bet are plastic jugs that chlorine bleach comes in. They are exactly purposed for storing corrosive alkaline solutions.