Assertion: nitric acid's concentration | /r/Desires | passivation process duration
Facets:
value: to several hours
type: TEMPORAL
Source sentences:
text: Lower overall cost to use: lower maintenance, safety and waste disposal costs, lower concentration of chemicals required Passivation Process Duration 20 minutes to several hours 5-20 minutes typical Process Temperature Elevated temperature required for many grades, nitric acid very dangerous at elevated temperatures Room temperature use for many grades, elevated temperature expedites the process and is safe without ventilation Chemical Process Maintenance Regular solution monitoring required (titration)