Assertion: seawater's concentration | /r/HasProperty | maintained in cooling systems
Facets:
value: to keep heat exchange surfaces
type: PURPOSE
Source sentences:
text: Concentrations of polyphosphates or phosphonates with zinc and chromates or similar compounds have been maintained in cooling systems to keep heat exchange surfaces clean so a film of gamma iron oxide and zinc phosphate may inhibit corrosion by passivating anodic and cathodic reaction points.