After 500 hours in the Seawater Spray (Fog) Chamber, the remaining four test panels were subjected to the Seawater Immersion Resistance test, ASTM D870. A plastic tank was filled with seawater and the panels were suspended from a line with plastic shims between the panel suspension holes. The panels were soaked in seawater for 336 hours (2 weeks), and then removed for final inspection.

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Results:

The Wasser® Brand System panel (number 6) and the POR-15® System panel (number 8) undercut by more than ¼ of an inch, and were considered failures. The Rust Bullet® panel (number 2) and the Rust-oleum® Cold Galvanizing Compound panel (number 5) still exhibited good film integrity and were considered as passing this phase of testing.

Printed from National Testing Standards, Inc., Report:
“Test No. 4:

Method: After 500 hours of salt fog/spray the remaining four test panels were submerged in sea water (ASTM D-870) for 336 hours (2 weeks).
Results: Panel numbers 6 and 8 undercut by more than ¼ of an inch were considered failures. Panel numbers 2 and 5 still exhibited good film integrity and were considered as passing this phase of testing.”

(Report No.27935R2 National Testing Standards, Inc.)