Resistance to Acids : Generally, enamel has a good resistance to acids whatever their concentration up to relatively high temperatures.
H2SO4 30% : 128°C abrasion 0.1mm/year
H2SO4 60% : 180°C abrasion 0.1mm/year
Resistance to Alkalis : Here the permissible temperature limits are lower than for acids.
NaOH 1N : Max. Temp. 55°C
Resistance to boiling water : Resistance to demineralized water is excellent.(under 100℃)