Turning a native or corroded Mg alloy surface into an anti-corrosion coating in excited CO₂.

ABSTRACT: Despite their energy-efficient merits as promising light-weight structural materials, magnesium (Mg) based alloys suffer from inadequate corrosion resistance. One primary reason is that the native surface film on Mg formed in air mainly consists of Mg(OH)₂ and MgO, which is porous and unprotective, especially in humid environments. Here, we demonstrate an environmentally benign method to grow a protective film on the surface of Mg/Mg alloy samples at room temperature, via a direct reaction of already-existing surface film with excited CO_2. Moreover, for samples that have been corroded obviously on surface, the corrosion products can be converted directly to create a new protective surface. Mechanical tests show that compared with untreated samples, the protective laye

SUBMITTER: Wang Y 

PROVIDER: S-EPMC6170486 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature