METHOD OF DETERMINING THE WEIGHT OF CONVERSION LAYERS PER UNIT OF AREA

METHOD OF DETERMINING THE WEIGHT OF CONVERSION LAYERS PER UNIT OF AREA

A method of determining the weight per unit of area of conversion layers, particularly of phosphate layers, on metals, in which the heat radiated from the dry surface which is covered with the conversion layer and is at the temperature T and the heat radiated from a reference surface or a reference...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HAUFFE, DIETER
Format: Patent
Sprache:eng
Schlagworte:
COLORIMETRY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
WEIGHING
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Beschreibung
Zusammenfassung:A method of determining the weight per unit of area of conversion layers, particularly of phosphate layers, on metals, in which the heat radiated from the dry surface which is covered with the conversion layer and is at the temperature T and the heat radiated from a reference surface or a reference cavity which is at the temperature T+t are periodically measured at a temperature between 15 DEG and 50 DEG C. by a wavelength-insensitive electic infrared detector. t is preferably selected in the range from +15 DEG to +3 DEG C. from -15 DEG to -3 DEG C. above or below T. The weight of the conversion layer per unit of area is determined from the amplitude of the resulting electric alternating signal. The radiant heat is suitable measured by an infrared detector having a sensor which consists of a pyroelectric sheet of polyvinylidene fluoride.