Abstract
1. An increase in concentration of sodium hydroxide solutions from 0.5 to 10 N affects the degree of corrosion of silicate glasses variously: glasses rich in silica are attacked proportionally to the alkali concentration, the destructive action on glasses rich in lead, zinc, cadmium, or magnesium is at first increased and then retarded as a result of the accumulation in the solution of anion-inhibitors and the formation of protective layers of magnesium hydroxide, and glasses rich in calcium, strontium, or bariumare attacked to the same extent by all solutions in the concentration range investigated. 2. An increase in the concentration of strontium or barium hydroxide solutions leads to a decrease in the corrosion of silicate glasses as a result of the formation on the surface of the glass of alkali-stable compounds.
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