1、 FORD LABORATORY TEST METHOD EU-BI 057-02 Date Action Revisions 2001 03 13 Revised Editorial no technical change A. Cockman 1994 02 28 Printed copies are uncontrolled Page 1 of 2 Copyright 2001, Ford Global Technologies, Inc. STONE CHIP RESISTANCE TEST Application This test method is used to determi
2、ne the resistance of painted finishes on metal and plastic parts to stone chipping. Apparatus and Materials Required Stone Chip Resistance Tester According to VDA Mod. 508 Source: Erichsen GmbH & Co. KG Supplier: Pearson-Panke Equipment Ltd. D-5870 Hemer Sundwig 1-3 Halegrove Gardens Germany London
3、NW7 3LR Chilled Iron Grit “Diamant“ Angular, 4 - 5 mm in size, rust free. Source: Eisenwerke Wurth GmbH 7101 Bad Friedrichshall/Jagstfeld Copper Sulphate Solution 5 % Containing 2 - 3 % concentrated sulfuric acid. Test Panels Plane surface, prepared and painted in accordance with the relevant materi
4、al specification, dimensions minimum 100 x 100 mm, coating thickness determined according to BI 117-01 or as otherwise specified. Evaluation Standards 4 colour photographs. Source: Central Laboratory Ford Werke AG Koln-Niehl West Germany FORD LABORATORY TEST METHOD EU-BI 057-02 Page 2 of 2 Copyright
5、 2001, Ford Global Technologies, Inc. Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless othe
6、rwise specified. Procedure Method A - For all materials except plastics as the substrate material. 1. Age test panels according to the relevant material specification. 2. Shot blast the test panels for a maximum of 10 seconds with 750 g of the shot using an air pressure of 0.1 MN/m2 (setting) at 23
7、+/- 3 C. 3. Expose test panels to salt spray test according to BI 103-01 for 72 h or as otherwise specified. 4. Rinse with water, dry with dry compressed air and condition for a maximum of 1 h at 23 +/- 2 C. 5. Repeat Stage 2 and dry with dry compressed air. Method B - For plastic substrates. As for
8、 Method A, except item 3 where test panels should be exposed for 72 h to water immersion test according to FLTM BI 104-01. Evaluation Only removal of coating down to substrate (steel or plastic panels) is to be noted. To help in the evaluation, when the test panels are steel, immerse panel in the co
9、pper sulphate solution for 10 minutes at 23 +/- 2 C and note copper covered areas. Note: 1. For special tests (e.g. Initial Sample) perform the test in triplicate and average the results. This is to minimize variations in test results. 2. The stone chip resistance tester must be checked periodically
10、 for effectiveness. If necessary the air pressure should be adjusted to bring in line with the results found with the equipment held by the Materials Laboratory of Product Engineering. 3. To avoid aerodynamic resistance ensure that the end of the flexible outlet has a ground clearness of at least 50 mm. 4. Discard shot and replace by new unused shot after using 100 times. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities.
