Volga | Technology & innovation | Industry, manufacturing
New technology comes to take on corrosion
5 Apr '21
Researchers at Togliatti State University in Russia’s Lower Volga region are working on technologies that would enable control of materials’ composition and properties to boost their strength, durability, and rust resistance, the Scientific Russia portal reported.
In one effort, the scientists are dealing with a key problem associated with magnesium alloys which thwarts their widespread use. It’s about the alloys’ low resistance to stress corrosion cracking (SCC). One of the solutions the team has come up with may be modification of their microstructure or surface.
In addition, the researchers are suggesting that the surfaces of aluminum and magnesium alloys be modified using plasma-electrolytic (microarc) oxidation (PEO) into solid wear- and rust-resistant ceramic layers to protect the base against mechanical and/or corrosive impact.
“By using a range of nanodimensional modifiers and, most importantly, their combinations that bring together two or more substances, we add to a material that forms a number of supplementary substances that alter the properties of new oxide layers the way we need, and a required blend of protective properties comes about as a result,” said Anton Polunin, a senior research fellow at the university.
The PEO technology is expected to protect and strengthen alloys for large body parts, including those of internal combustion engines, an array of control system components, including levers, traction elements, etc., and many more. Magnesium alloys that have shown promise when used in medicine for seamlessly healing bone fractures and cracks would also benefit from such strengthening and protective measures.