DAIMLERCHRYSLER CORPORATION No: LP-463PB-31-01 Laboratory Procedure Date Published: 2005-02-22 Category Code: J-1 Change: H RESTRICTED: NoRESISTANCE OF PAINT FILMS TO VARIOUS FLUIDS 漆膜对各种液体的抵抗力1.0 GENERAL1.1 Purpose 目的This procedure describes the method for determining resistance of paint films and substrates to an array of vehicle and commercial fluids. 此过程描述了测定漆膜和底材对一批汽车和商品液体抵抗力的方法。2.0 SPECIAL TEST EQUIPMENT pressing tape in place, then remove with rapid vertical movement from the panelC. Immerse the test pieces in the water bath in accordance with ASTM D870 for the length of time specified in the Material or Performance Standard.D. After completion of the test period remove panel and blow off or wipe dry with a clean soft cloth.E. Examine the panel, indicating spots or areas of corrosion, creep age (under cutting) from scribed lines, or blistering.F. Apply masking tape over scribed lines then remove the tape with a rapid, vertical pull.G. Record results.Method H Acid Spot Test 方法H 酸点实验TABLE 4: ACID AND DURATIONS FOR METHOD H 表4： 方法H酸度和持续时间 Acid Solution 酸溶液Strength 密度Duration 持续时间Hydrochloric Acid Solution 盐酸溶液10.0% by weight 按重量计算为 10.0% 90 minutes 90分钟Nitric Acid Solution 硝酸溶液10.0% by weight 按重量计算为 10.0% 30 minutes 30分钟Sulfuric Acid Solution 硫酸溶液1.0 Normal 1.0 正常16 hours covered with 50 mm diameter watch glass 用50毫米直径手表玻璃覆盖16小时Sodium Hydroxide Solution 氢氧化钠溶液1.0% by weight 按重量计算为 10.0%60 minutes 60分钟A. Apply acid to panels and expose for times listed above.在板子上使用酸液并且暴露上面列出的时间B. At completion of each test, wipe off any residue from spots with a damp cloth.在每个测试完成时，用潮湿的布擦去液滴的残留物。C. Examine panel for softening, color change or darkening of the paint film. Record results.检查测试板漆膜的软化，颜色改变或暗色化情况。记录结果。Method I - Acid Spot Test - Hydrochloric Acid Solution in Sunlamp Cabinet 方法 I 酸点实验 太阳灯实验箱内盐酸溶液 A. Preheat the sunlamp cabinet by operating it for a minimum of 5 minutes before starting the test.在开始实验时至少让太阳灯实验箱提前预热5分钟。B. Panels shall be approximately 450 mm (18 in) from surface of sunlamps. The exact distance shall be determined by using a black base/clear enamel panel adjusted from the bulb until the surface temperature of the panel is maintained at 80 90 C (180 190F).测试板应该离太阳灯表面大约450毫米（18英寸）。精确的距离应该用一个黑色底部/透明指甲 油板调节灯泡直到测试板表面的温度保持在80-90摄氏度（180-190华氏度）C. Place 0.15 cc (approximately 3 drops) of each of the test solutions (0.5%, 1.0%, 2.0%, and 4.0% Hydrochloric acid) onto 4 separate areas of the test panel.把每个实验溶液（0.5%, 1.0%, 2.0%, 和4.0%盐酸）的0.15立方厘米放在测试板4个不同相离的 区域。D. Place the panels in a horizontal position in the sunlamp cabinet for 30 minutes.把测试板放在太阳灯实验箱水平位置30分钟。E. Remove the test panels, cool the panels to room temperature, wipe off any residue from the spot locations with a damp cloth, then examine the test areas of panel for softening, color change, or darkening of the paint film.移出测试板，冷却到室温，用湿布擦去液滴位置的残留物。然后检查测试板测试区域漆膜的软 化，颜色变化或暗色化。NOTE: New sunlamps must be run for 24 hours before being used with the acid spot test. Sunlamp bulbs shall be replaced after 176 hours of use (200 hours total). 注意：新的太阳灯必须在用于酸点实验前使用24小时。太阳灯灯泡应该在使用176小时后进行更换。 （总共200小时）Method J Solvent Wipe Resistance 方法J -溶剂擦拭抵抗力A. Wet out a cheesecloth (150 mm or 6 in square) pad with the reagent grade of solvent specified in the applicable Material or Performance Standard.用适用材料或性能标准中指定的试剂等级的溶剂浸湿一个cheesecloth（一种粗棉布）的小垫B. Rub the pad on the painted surface (approximately ten double strokes) while exerting moderate pressure. Note any appreciable resistance to rubbing or wiping.用垫子加适度的压力摩擦喷图表面（大约10个来回）。注意摩擦或擦拭适当的抵抗力。C. Examine the rubbed area to determine if the painted surface has been softened.检查摩擦的区域来测定喷图表面是否软化。D. Allow the film to dry for 30 minutes and note any deviation from original color, gloss or appearance. For in-plant QC testing of baked on coatings, this procedure can be performed as soon as the test panel is cooled to room temperature.让漆膜干燥30分钟并注意和原来颜色，光泽或外观的差异。对于在涂层烤焙厂内质量控制测试， 在测试板冷却到室温时就可以进行这个步骤。