The microbiologically induced corrosion (MIC) behavior of open-cell aluminum foams (UNS A96101) was
evaluated in sodium chloride solutions. Cast and heat treated UNS A96101 foams of relative densities in
the 6-8% range and pore densities of 10, 20, and 40 pores per inch (PPI) were subjected to immersion
tests under three different conditions. In one set of tests, coupons were subjected to immersion in
simulated seawater (3.5 wt.% NaCl) under laboratory conditions in accordance with the ASTM G31-12a
standard. Another set of experiments was performed by immersing foam test coupons in natural seawater
off Terminal Island, Long Beach, California, for 7 and 14 days. An additional series of tests was conducted
by immersing coupons in natural seawater aged in the laboratory. The surface of the foam coupons
following each of the immersion tests was cleaned using an acid cleaning procedure that was developed
expressly for quantifying foam corrosion. The microstructure and surface morphology were then
characterized using scanning electron microscopy, coupled