"Thermal sprayed layers can be metallic or ceramic. Their quality control is only possible to a limited extent using non-destructive testing methods. However, with metallographic examinations, the characteristic features of a sprayed layer such as thickness, microstructure (structure, porosity), bond to the base material and hardness can be reliably assessed. These Mainly microscopic tests, including hardness measurements, are carried out using reflected light microscopes on samples that have been specially ground, polished and, if necessary, etched for structure development
DVS 2310-1-1999 Referenced Document
DIN EN 582:1994 Thermal spraying; determination of tensile adhesive strength; German version EN 582:1993
DIN EN ISO 9220:1995 Metallic coatings - Measurement of coating thickness - Scanning electron microscope method (ISO 9220:1988); German version EN ISO 9220:1994
DVS 2301-1987 Thermal spraying processes for metallic and non-metallic materials