steel corrosion test panel for MIL-PRF-3420 Long Term Protection Test front view
  • MIL-PRF-3420 §4.5.2 Corrosion Test Panels

    Steel test panels used in testing by MIL-PRF-3420 §4.5.2 (Long Term Protection Test). These test panels are 2" x 4" x 1/8", with rounded edges and 1/8" holes drilled at opposite corners on one long edge. Each panel is surface ground and polished 240 grit. This test procedure uses four panels for each test.