ANSI BHMA A156.18:2000 pdf free download – AMERICAN NATIONAL STANDARD FOR MATERIALS & FINISHES
3.7 Ultraviolet Light and Condensation Test. This test shall be conducted in accordance with ASTM G 53-96 Standard Recommended Practice for Operating Light and Water Exposure Apparatus (Fluorescent UV-Condensation Type) for Exposure of Nonmallic Materials except as follows. For products having only interior exposure, use UVA-351 lamps. For all other products, use UVA-340 lamps. The test cycles and duration shall be specified in the applicable ANSIBHMA A156 Series Standards. Three test specimens shall be tested for each finish and one additional specimen shall be retained for comparison at the end of the test. For coatings used on multiple base materials, testing of only one material is required. The retained specimen shall be stored in a controlled environment and protected from UV exposure. Start the test at the beginning of a UV cycle and end it at the conclusion of a condensation cycle. Test specimens shall be the actual product or component. Refer to 3.1.2 when finished product or component cannot be adopted to the UV test equipment. The test specimen shall be mounted as specified in ASTM G 53. Any of the cut edges of the panels are permitted to be sealed with silicone sealant or vinyl electrical tape. At the conclusion of the test, the retained panel and the tested panels shall be viewed in accordance with 4.3.3 and shall appear the same. Visual failure modes shall be any chipping, flaking, cracking, color loss, or change (from clear to white, yellow or brownish). At the completion of the UItra Violet Light and Condensation Test, the panel shall pass F pencil hardness when tested in accordance with 3.4.
3.8 Taber Abrasion Test. This Test shall be conducted in accordance with ASTM D4060-95 Test Method for Abrasion Resistance of Organic Coatings by the Taber Abraser. A uniform thickness of the coating to be tested shall be applied to a .060 in. (1.5 mm) minimum thick coupon using the manufacturer’s normal coating materials and processes. The coating thickness of specimen shall reflect the average coating thickness of the manufacturer’s products. The wheel shall be a CS-10 calabrase with a 1000 gram load. Reface the wheel every 500 cycles. Failure constitutes wearing through the coating to the coupon prior to completing the number of cycles specified in the applicable ANSI/BHMA A156 Series Standard. Detection shall be by a BHMA Holiday Detector (see Figure 2) or by visual inspection when the conductivity test is not applicable with non-conducting substrates nor with conductive coatings.
3.9 CASS Salt Spray Test. This test shall be conducted in accordance with ASTM B368-85(Reaffirmed 1990) Standard Method for Copper-Accelerated Acetic Acid-Salt Spray (for) Testing. Parts shall withstand exposure for the time specified in the applicable ANSI/BHMA A156 Series Standard without base material or substrate corrosion exceeding one spot visible to the unaided eye per one square inch (645 square mm) of significant surface and without any spot larger than 1/16 in. (1.6 mm) in diameter. Staining shall not exceed 5% of the significant surface area of the component under test and without any spot larger than 1/4 in. (6.4 mm) in diameter.