Figure 4. Surface macrographs of uncoated and coated ASTM-SA213-T-11 boiler steel subjected to salt-fog testing (5% NaCl) for 48 hrs: (a) Uncoated ASTM-SA213-T-11 boiler steel (b) Nanostructured TiAlN coating (c) Nanostructured AlCrN coating

From

Corrosion Behavior of Nanostructured Tialn and Alcrn Thin Coatings on ASTM-SA213-T-11 Boiler Steel in Simulated Salt Fog Conditions

Vikas Chawla

Materials Science and Metallurgy Engineering. 2013, 1(2), 31-36 doi:10.12691/msme-1-2-4