Studies On Salt Fog Corrosion Behaviour of Ferrous and Non-Ferrous Alloys

Abstract

The salt spray (or salt fog) test is a standardized and popular test technique for measuring how effectively materials and surface coatings resist corrosion. Coated samples are tested with salt spray, which speeds up corrosion, to see if they are appropriate for use as a protective finish. The presence of rust (iron or even other oxides) is evaluated after a set period of time. The length of the test depends on how well the coating resists corrosion. In the current study, an effort has been made to look at how different ferrous and non-ferrous alloys react to salt fog corrosion over the course of varied exposure intervals. Borated stainless steel, mild steel, aluminum, and aluminum composite material were the materials chosen for this investigation (Made by powder metallurgy), Microstructures were photographed using an optical microscope both before and after the test. Additionally, compared and analyzed are the microstructures of specimens tested with salt-fog spraying during intervals of 5 hours, 10 hours, and 24 hours. Also, the specimens' weight in miles per year is computed, and the rates of corrosion of ferrous and non-ferrous materials are contrasted for various exposure durations.