Gravelometer
Stone impact test - Chip resistance test
Stone impact test is used to assess the resistance of automotive paints and similar coatings against the bombardment with a chilled granulate or manufactured according to standard stones as a simulated rock impact.
The stone chip resistance of the coating is tested by many small sharp-edged striking bodies or stones, which hit in rapid succession and largely independently of each other. The bombardment material is a defined chilled granulate or stones, which is shot with compressed air at a fixed angle to the coating. The extent of the damage also depends on the working pressure, the mass of the bombardment material, the firing time and the design of the tester. Loosely attached coating material is removed with an adhesive tape. The degree of damage is assessed by comparison with images.
Standard: SAE J200 and DIN DIN EN ISO 20567-1:2007-01
Standards:
SAE J400
DIN EN ISO 20567-1
BMW AA-0079
FORD FLTM BI 157-06
RENAULT D24 1702
PSA D24 1312
DAIMLER DBL 5416
ASTM D 3170
