About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Advanced Materials for Harsh Environments
|
| Presentation Title |
Alloyed Diffusion Coatings on Brass for Enhanced Corrosion Resistance in Harsh Environments |
| Author(s) |
Borys Sereda, Kruglyak Irina, Dmytro Sereda, Ivan Suslov, Dmytro Smirnov |
| On-Site Speaker (Planned) |
Kruglyak Irina |
| Abstract Scope |
Corrosion behavior of CuZn40Mn2Fe1 brass and the effectiveness of alloyed protective coatings obtained under non-steady-state temperature conditions in concentrated acidic media (HCl, HNO₃, H₂SO₄) were investigated. Si and Ti alloying was found to promote the formation of stable passivating oxide films (SiO₂, TiO₂), which significantly reduce the corrosion rate. In 30% HCl, the minimum mass losses are 12.6 and 15.8 g/m² respectively, whereas in 30% HNO₃ they are 31–36 g/m². Sulfuric acid acts on brass much more slowly, but in the presence of oxidizing agents {K₂Cr₂O₇, Fe₂(SO₄)₃}, the corrosion rate increases by two orders of magnitude; all coatings demonstrate high resistance (10.4–11.8 g/m²). Increased corrosion resistance is associated with the formation of dense oxide layers and an increase in residual compressive stresses, which prevent the destruction of the passive film. Results confirm the potential of the developed coatings for use in aggressive environments. |