Summary & Conclusion:
Test samples of all color offerings show no visible deteriortion per ASTM D1654 and ASTM D714 after 3,000 hours of exposure to ASTM B117 test method with only slight discoloration of test coupon #5, silver metallic.
Eight powder coated aluminum coupons were tested per ASTM B117 Salt Spray Fog Test. Each test sample was coated with standard NLS color offerings; white, dark gray, light gray, dark green, metallic, bronze, black, and green. All 8 test coupons were exposed for 3000 hours. Coupons were inspected at 1000, 2000, and 3000 hours with specific inspection criteria of creepage at scribe, blister frequency, and blister size. Slight discoloration was noticed on test coupon #5, silver metallic; no creepage or blisters were present. Results of testing are for powder coated aluminum typically used in the construction of NLS fixtures.