Which chemical risk increases when hydrofluoric acid is used during the 'pietra dura' process?

💡 Explanation

The acid's 'acid etching' mechanism can weaken the structural integrity of the marble/stone during cleaning, because HF dissolves silicates. Therefore, the long-term structural stone is less robust, rather than other degradation issues of dyes/grout.

• Which consequence results when Vikings attempting coastal navigation experience unfavorable 'head' winds?
• Which outcome increased the lifespan of geared sakia waterwheels, developed and used in Ancient Egypt, that were constructed with bronze components?
• Which structural failure results when Roman concrete in a marine pier experiences prolonged sulfate attack?
• Which outcome occurred when storing surplus maize improperly within pre-Columbian Mesoamerican urban centers?
• Which mechanical change would improve Greek fire's projection?
• Which outcome was mitigated as bronze metallurgy advanced during the Bronze Age?